50278 + Interview Questions in Physics

1.	A boy standing on a long railroad car throws a ball straight upwards with a speed of 10 m/s at t=0 when the car starts moving on a horizontal road with an acceleration of 1 m/s2. How far behind the boy will the ball fall on the car? (Take g=10 m/s2).
Answer» A boy standing on a long railroad car throws a ball straight upwards with a speed of $10 m/s$ at $t = 0$ when the car starts moving on a horizontal road with an acceleration of $1 {m/s}^{2}$ . How far behind the boy will the ball fall on the car? (Take $g = 10 {m/s}^{2}$ ).

Discussion

2.	In the figure shown for gives of R1 and R2 the balance point for jockey is at 40 cm from A when R2 is shunted by a resistance of 10 Ω, balance point shifts to 50 cm from A,. Then R1,R2 are
Answer» In the figure shown for gives of $R_{1}$ and $R_{2}$ the balance point for jockey is at $40 cm$ from $A$ when $R_{2}$ is shunted by a resistance of $10 Ω$ , balance point shifts to $50 cm from A,$ . Then $R_{1}, R_{2}$ are

Discussion

3.	A set of 'n' identical cubical blocks lies at rest parallel to each other along a line on a smooth horizontal surface. The separation between the near surfaces of any two adjacent blocks is L. The block at one end is given a speed 'v' towards the next one at time, t = 0. All collisions are completely inelastic, then
Answer» A set of 'n' identical cubical blocks lies at rest parallel to each other along a line on a smooth horizontal surface. The separation between the near surfaces of any two adjacent blocks is L. The block at one end is given a speed 'v' towards the next one at time, t = 0. All collisions are completely inelastic, then

Discussion

4.	A particle of mass m tied to a string is moving in a vertical circular path such that the speed is just sufficient to complete the circle . String is light then find the acceleration of particle when it reaches at point A.
Answer» A particle of mass m tied to a string is moving in a vertical circular path such that the speed is just sufficient to complete the circle . String is light then find the acceleration of particle when it reaches at point A.

Discussion

5.	A coil having N turns is wound tightly in the form of a spiral with inner and outer radii a and b respectively. When a current I passes through the coil, the magnetic field at the centre is
Answer» A coil having N turns is wound tightly in the form of a spiral with inner and outer radii a and b respectively. When a current I passes through the coil, the magnetic field at the centre is

Discussion

6.	How would you justify the presence of 18 elements in the 5th Period of the periodic table?
Answer» How would you justify the presence of 18 elements in the 5th Period of the periodic table?

Discussion

7.	ntThe casing of a rocket in flight burns up due to friction .At whose expense is the heat energy required for burning obtained?The rocket or the atmosphere?n
Answer» ntThe casing of a rocket in flight burns up due to friction .At whose expense is the heat energy required for burning obtained?The rocket or the atmosphere?n

Discussion

8.	A galvanometer of 50 ohm has 25 divisions.A current of 4*10-4 A gives a deflection of one division.to convert this to a galvanometer having a range of 25 V it should be connected with a resistance of
Answer» A galvanometer of 50 ohm has 25 divisions.A current of 4*10-4 A gives a deflection of one division.to convert this to a galvanometer having a range of 25 V it should be connected with a resistance of

Discussion

9.	What happens to the value of capacitance of a parallel plate capacitor when the distance between the two plates increases?
Answer» What happens to the value of capacitance of a parallel plate capacitor when the distance between the two plates increases?

Discussion

10.	23What should be the anguiar speed with which the earth have to rotate on its axis so that a person ornthe equator would weigh 3/5 th as much as present?
Answer» 23What should be the anguiar speed with which the earth have to rotate on its axis so that a person ornthe equator would weigh 3/5 th as much as present?

Discussion

11.	A block of mass 2 kg is connected to one end of a system of springs as shown in figure. The springs are massless, having spring constants k1=100 N/m,k2=200 N/m, and natural lengths of 0.5 m each. The other end of the system is fixed at the centre of a frictionless horizontal table. Initially, spring mass system is at rest. If the springs remain horizontal and the mass is made to rotate at an angular speed of half rev/s, then the value of spring force F1 and F2 (in newton) are.
Answer» A block of mass $2 k g$ is connected to one end of a system of springs as shown in figure. The springs are massless, having spring constants $k_{1} = 100 N / m, k_{2} = 200 N / m$ , and natural lengths of $0.5 m$ each. The other end of the system is fixed at the centre of a frictionless horizontal table. Initially, spring mass system is at rest. If the springs remain horizontal and the mass is made to rotate at an angular speed of half $r e v / s$ , then the value of spring force $F_{1}$ and $F_{2}$ (in newton) are.

Discussion

12.	A plate of area 4 m2 is made to move horizontally with a speed of 4 m/s by applying a horizontal tangential force over the free surface of a liquid. If the depth of the liquid is 2 m and the liquid is in contact with the bed which is stationary. Co-efficient of viscosity of liquid is 0.01 poise. The tangential force needed to move the plate is (in 10−3 N)
Answer» A plate of area $4 m^{2}$ is made to move horizontally with a speed of $4 m/s$ by applying a horizontal tangential force over the free surface of a liquid. If the depth of the liquid is $2 m$ and the liquid is in contact with the bed which is stationary. Co-efficient of viscosity of liquid is $0.01 poise$ . The tangential force needed to move the plate is (in $10^{- 3} N)$

Discussion

13.	A particle is suspended from a fixed point by a string of length 3 m. It is projected from equilibrium position with such a velocity that the string slackens after the particle has reached a height of 5 m above the lowest point. Find the velocity of the particle, just before the string slackens. Take g=9.81 m/s2.
Answer» A particle is suspended from a fixed point by a string of length $3 m$ . It is projected from equilibrium position with such a velocity that the string slackens after the particle has reached a height of $5 m$ above the lowest point. Find the velocity of the particle, just before the string slackens. Take $g = 9.81 {m/s}^{2}$ .

Discussion

14.	A closely wound solenoid of 2000 turns and area of cross-section1.6 × 10–4 m2, carrying a current of 4.0 A, is suspended through itscentre allowing it to turn in a horizontal plane. (a) What is the magnetic moment associated with the solenoid? (b) What is the force and torque on the solenoid if a uniformhorizontal magnetic field of 7.5 × 10–2 T is set up at an angle of30° with the axis of the solenoid?
Answer» A closely wound solenoid of 2000 turns and area of cross-section1.6 × 10–4 m2, carrying a current of 4.0 A, is suspended through itscentre allowing it to turn in a horizontal plane. (a) What is the magnetic moment associated with the solenoid? (b) What is the force and torque on the solenoid if a uniformhorizontal magnetic field of 7.5 × 10–2 T is set up at an angle of30° with the axis of the solenoid?

Discussion

15.	What are wave equations,how to represent wave equation in a circle
Answer» What are wave equations,how to represent wave equation in a circle

Discussion

16.	The potentiometer wire AB shown in figure (32 - E27) is 50 cm long. When AD = 30 cm, no deflection occurs in the galvanometer. Find R
Answer» The potentiometer wire AB shown in figure (32 - E27) is 50 cm long. When AD = 30 cm, no deflection occurs in the galvanometer. Find R

16.

The potentiometer wire AB shown in figure (32 - E27) is 50 cm long. When AD = 30 cm, no deflection occurs in the galvanometer. Find R

Answer»

The potentiometer wire AB shown in figure (32 - E27) is 50 cm long. When AD = 30 cm, no deflection occurs in the galvanometer. Find R

Discussion

17.	Focal length of the objective lens and the eyepiece of an astronomical telescope are 100 cm and 2 cm respectively. Find the angular magnification produced in the case of the least strain on the eye.
Answer» Focal length of the objective lens and the eyepiece of an astronomical telescope are $100 cm$ and $2 cm$ respectively. Find the angular magnification produced in the case of the least strain on the eye.

Discussion

18.	When forces F1, F2 and F3 are acting on a particle of mass m such that F2 and F3 are mutually perpendicular, then the particle remains stationary. If the force F1 is now removed then the acceleration of the particle is
Answer» When forces F $_{1}$ , F $_{2}$ and F $_{3}$ are acting on a particle of mass m such that F $_{2}$ and F $_{3}$ are mutually perpendicular, then the particle remains stationary. If the force F $_{1}$ is now removed then the acceleration of the particle is

Discussion

19.	A passenger is travelling inside a train moving at 40 ms−1. His suitcase is kept on the berth. The driver of train applies breaks such that the speed of the train decreases at a constant rate to 20 ms−1 in 4 s. What should be the minimum coefficient of friction between the suitcase and the berth if the suitcase is not to slide during retardation of the train? (Take g=10 m/s2)
Answer» A passenger is travelling inside a train moving at $40 m s^{- 1}$ . His suitcase is kept on the berth. The driver of train applies breaks such that the speed of the train decreases at a constant rate to $20 m s^{- 1}$ in $4 s$ . What should be the minimum coefficient of friction between the suitcase and the berth if the suitcase is not to slide during retardation of the train? (Take $g = 10 m / s^{2}$ )

Discussion

20.	A block of mass 5 kg is dropped on a vertical spring of spring constant 1200 N/m from a height of 10 m. Assuming that all the energy of the block is absorbed by the spring, what is the compression produced in the spring?(Take g=10 m/s2)
Answer» A block of mass $5 kg$ is dropped on a vertical spring of spring constant $1200 N/m$ from a height of $10 m$ . Assuming that all the energy of the block is absorbed by the spring, what is the compression produced in the spring? (Take $g = 10 {m/s}^{2}$ )

Discussion

21.	A jet of water is projected at an angle θ = 45∘ with horizontal from the point A which is situated at a distance x = OA = 12m from a vertical wall. If the speed of projection is v0 = √10 m/s , find the point P of striking of the water jet with the vertical wall.
Answer» A jet of water is projected at an angle $θ$ = $45^{\circ}$ with horizontal from the point A which is situated at a distance $x$ = $O A$ = $\frac{1}{2} m$ from a vertical wall. If the speed of projection is $v_{0} = \sqrt{10} m / s$ , find the point $P$ of striking of the water jet with the vertical wall.

21.

A jet of water is projected at an angle θ = 45∘ with horizontal from the point A which is situated at a distance x = OA = 12m from a vertical wall. If the speed of projection is v0 = √10 m/s , find the point P of striking of the water jet with the vertical wall.

Answer»

A jet of water is projected at an angle $θ$ = $45^{\circ}$ with horizontal from the point A which is situated at a distance $x$ = $O A$ = $\frac{1}{2} m$ from a vertical wall. If the speed of projection is $v_{0} = \sqrt{10} m / s$ , find the point $P$ of striking of the water jet with the vertical wall.

Discussion

22.	A certain charge Q is to be divided into two parts q and Q−q. The relationship between Q and q placed at a certain distance apart to have the maximum Coulomb repulsion is
Answer» A certain charge $Q$ is to be divided into two parts $q$ and $Q - q$ . The relationship between $Q$ and $q$ placed at a certain distance apart to have the maximum Coulomb repulsion is

Discussion

23.	Centripetal force is present in both inertial and non inertial frame of reference then how centrifugal force is only present in non inertial frame of reference, it simply means that it is absent in inertial frame of reference , is it true?
Answer» Centripetal force is present in both inertial and non inertial frame of reference then how centrifugal force is only present in non inertial frame of reference, it simply means that it is absent in inertial frame of reference , is it true?

Discussion

24.	1g H2 gas expand at STP to occupy double of its original volume. The work done during the process is(1) 260 cal(3) 130 cal26.(2) 180 cal(4) 270 cal
Answer» 1g H2 gas expand at STP to occupy double of its original volume. The work done during the process is(1) 260 cal(3) 130 cal26.(2) 180 cal(4) 270 cal

Discussion

25.	(a) In the following diagram 'S' is a semiconductor. Would you increase or decrease the value of R to keep the reading of the ammeter A constant when S is heated ? Give reason for your answer. (b) Draw the circuit of a photodiode and explain its working. Draw its I- V characteristics.
Answer» (a) In the following diagram 'S' is a semiconductor. Would you increase or decrease the value of R to keep the reading of the ammeter A constant when S is heated ? Give reason for your answer. (b) Draw the circuit of a photodiode and explain its working. Draw its I- V characteristics.

Discussion

26.	102.when one metre,one kg and one minute taken as fundamental units,the magnitude of a force is 36 units. What is the value of this force on cgs system?
Answer» 102.when one metre,one kg and one minute taken as fundamental units,the magnitude of a force is 36 units. What is the value of this force on cgs system?

Discussion

27.	Two tuning forks A and B vibrating simul†an eously produce 5 beats per second.Frequency of B is 512 Hz.If one arm of A is filed,the number of beats per seconds increases.Frequncy of A is?
Answer» Two tuning forks A and B vibrating simul†an eously produce 5 beats per second.Frequency of B is 512 Hz.If one arm of A is filed,the number of beats per seconds increases.Frequncy of A is?

Discussion

28.	12.Two satellite of one metric tin and twelve metric ton masses are revolving around the earth . The heights of these two satellites from the earth are 1600 km and 25600 km respectively . What is the ratio of their time period and what is the ratio of the accelerations due to gravity at those heights.
Answer» 12.Two satellite of one metric tin and twelve metric ton masses are revolving around the earth . The heights of these two satellites from the earth are 1600 km and 25600 km respectively . What is the ratio of their time period and what is the ratio of the accelerations due to gravity at those heights.

Discussion

29.	A container has a small hole at its bottom. Area of cross-section of the hole is A1 and that of the container is A2. Liquid is poured into the container at a constant rate of Q m3/s. The maximum level of liquid in the container will be -
Answer» A container has a small hole at its bottom. Area of cross-section of the hole is $A_{1}$ and that of the container is $A_{2} .$ Liquid is poured into the container at a constant rate of $Q m^{3} /s .$ The maximum level of liquid in the container will be -

Discussion

30.	The electric potential at the surface of an atomic nucleus (Z=50) of radius 9×10−15 m is
Answer» The electric potential at the surface of an atomic nucleus $(Z = 50)$ of radius $9 \times 10^{- 15} m$ is

Discussion

31.	Two sitar strings A and B playing the note ‘Ga’ are slightly out of tune and producebeats of frequency 6 Hz. The tension in the string A is slightly reduced and thebeat frequency is found to reduce to 3 Hz. If the original frequency of A is 324 Hz, what is the frequency of B?
Answer» Two sitar strings A and B playing the note ‘Ga’ are slightly out of tune and producebeats of frequency 6 Hz. The tension in the string A is slightly reduced and thebeat frequency is found to reduce to 3 Hz. If the original frequency of A is 324 Hz, what is the frequency of B?

Discussion

32.	The author of the passage develops her points about Johnson primarily by:
Answer» The author of the passage develops her points about Johnson primarily by:

32.

The author of the passage develops her points about Johnson primarily by:

Answer»

The author of the passage develops her points about Johnson primarily by:

Discussion

33.	A rod, of length L at room temperature and uniform area of cross-section A, is made of a metal having coefficient of linear expansion α ∘C−1. It is observed that an external compressive force F, is applied on each of its ends, prevents any change in the length of the rod, when its temperature rises by ΔT K. Young's modulus, Y, for this metal is:
Answer» A rod, of length $L$ at room temperature and uniform area of cross-section $A$ , is made of a metal having coefficient of linear expansion $α^{\circ} C^{- 1}$ . It is observed that an external compressive force $F$ , is applied on each of its ends, prevents any change in the length of the rod, when its temperature rises by $Δ T K$ . Young's modulus, $Y$ , for this metal is:

Discussion

34.	34.A particle is moving in a circle of radius r having centre o with a constant speed v.the magnitude of change in velocity moving from a to b is
Answer» 34.A particle is moving in a circle of radius r having centre o with a constant speed v.the magnitude of change in velocity moving from a to b is

Discussion

35.	An electron in Bohr's hydrogen atom has an energy of −3.4 eV. The angular momentum of the electron is
Answer» An electron in Bohr's hydrogen atom has an energy of $- 3.4 e V$ . The angular momentum of the electron is

Discussion

36.	P→Solid sphere, Q→Solid cube,R→Solid cone, S→Solid cylinder Assuming potential energy ′U′ at the ground level to be zero. All objects are made of the same material. UP=Potential energy of solid sphere UQ=Potential energy of solid cube UR=Potential energy of solid cone US=Potential energy of solid cylinder Identify the correct option(s).
Answer» $P \to Solid sphere, Q \to Solid cube, R \to Solid cone, S \to Solid cylinder$ Assuming potential energy $^{'} U^{'}$ at the ground level to be zero. All objects are made of the same material. $U_{P} = Potential energy of solid sphere$ $U_{Q} = Potential energy of solid cube$ $U_{R} = Potential energy of solid cone$ $U_{S} = Potential energy of solid cylinder$ Identify the correct option(s).

Discussion

37.	Find the velocity of image.
Answer» Find the velocity of image.

Discussion

38.	A gas is initially at a pressure of 100 kPa and its volume is 2 m3. Its pressure is kept constant and the volume is changed from 2 m3to 2.5 m3. Its volume is now kept constant and the pressure is increased from 100 kPa to 200 kPa. The gas is brought back to its initial state, the pressure varying linearly with its volume, (a) Whether the heat is supplied to or extracted from the gas in the complete cycle ? (b) How much heat was supplied or extracted ?
Answer» A gas is initially at a pressure of 100 kPa and its volume is 2 m3. Its pressure is kept constant and the volume is changed from 2 m3to 2.5 m3. Its volume is now kept constant and the pressure is increased from 100 kPa to 200 kPa. The gas is brought back to its initial state, the pressure varying linearly with its volume, (a) Whether the heat is supplied to or extracted from the gas in the complete cycle ? (b) How much heat was supplied or extracted ?

Discussion

39.	(3) 1200-211A person takes T, second to move up a cdistance on the stationary escalator. While mup on a moving escalator, the person takesecond to ccver same distance. The time takcover the same distance if man just stands omoving escalator isAV-RI(4) 150T2-T2T2 T(2) T +T1 2'1T-T211T, TT, +T(3) TT2(4) 1211-"A particle is moving on a straight line such th
Answer» (3) 1200-211A person takes T, second to move up a cdistance on the stationary escalator. While mup on a moving escalator, the person takesecond to ccver same distance. The time takcover the same distance if man just stands omoving escalator isAV-RI(4) 150T2-T2T2 T(2) T +T1 2'1T-T211T, TT, +T(3) TT2(4) 1211-"A particle is moving on a straight line such th

Discussion

40.	a rod of mass m and length is hinged to its one end and held vertical . a point mass m is attached to other end is allowed to rotate about the hinge .the velocity of rod when it becomes horizontal is
Answer» a rod of mass m and length is hinged to its one end and held vertical . a point mass m is attached to other end is allowed to rotate about the hinge .the velocity of rod when it becomes horizontal is

Discussion

41.	In the arrangement as shown, tension T2 is (g=10 m/s2)
Answer» In the arrangement as shown, tension $T_{2}$ is ( $g = 10 {m/s}^{2}$ )

Discussion

42.	A particle is moving in a horizontal circle with constant speed. It has constant
Answer» A particle is moving in a horizontal circle with constant speed. It has constant

Discussion

43.	136.Angular velocity of wheel is 2 radian/second. Calculate the number of rotation of the wheel in 5 second
Answer» 136.Angular velocity of wheel is 2 radian/second. Calculate the number of rotation of the wheel in 5 second

Discussion

44.	An ideal gas is taken from state A to the state B, as shown in the P−V diagram. The work done in the process is
Answer» An ideal gas is taken from state $A$ to the state $B$ , as shown in the $P - V$ diagram. The work done in the process is

Discussion

45.	Note : In stating numerical answers, take care of significant figures. Fill in the blanks (a) The volume of a cube of side 1 cm is equal to .....m³ (b) The surface area of a solid cylinder of radius 2.0 cm and height 10.0 cm is equal to ...(mm)² (c) A vehicle moving with a speed of 18 km h¯¹ covers....m in 1 s (d) The relative density of lead is 11.3. Its density is ....g cm¯³ or ....kg m¯³.
Answer» Note : In stating numerical answers, take care of significant figures. Fill in the blanks (a) The volume of a cube of side 1 cm is equal to .....m³ (b) The surface area of a solid cylinder of radius 2.0 cm and height 10.0 cm is equal to ...(mm)² (c) A vehicle moving with a speed of 18 km h¯¹ covers....m in 1 s (d) The relative density of lead is 11.3. Its density is ....g cm¯³ or ....kg m¯³.

Discussion

46.	The transfer function of a phase lead controller is 1+3Ts1+Ts. The maximum value of phase provided by this controller is
Answer» The transfer function of a phase lead controller is $\frac{1 + 3 T s}{1 + T s} .$ The maximum value of phase provided by this controller is

Discussion

47.	The density of water is 1000kgm^3.the density of water vapor at 100 degree celcius and 1 atm pressure is 0.6 kg per meter cube.the volume of a molecule multiplied by total number gives ,what is called molecular volume.estimate the ratio of the molecular volume to the total volume occupied by the water vapour under the above conditions of temperature and pressure
Answer» The density of water is 1000kgm^3.the density of water vapor at 100 degree celcius and 1 atm pressure is 0.6 kg per meter cube.the volume of a molecule multiplied by total number gives ,what is called molecular volume.estimate the ratio of the molecular volume to the total volume occupied by the water vapour under the above conditions of temperature and pressure

Discussion

48.	Question 1A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why?
Answer» Question 1 A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why?

Discussion

49.	Two sources S1 and S2 emitting light of wavelength 600 nm are placed a distance 1.0×10−2 cm apart. A detector can be moved on the line S1P, which is perpendicular to S1S2. The maximum path difference at the detector as it is moved along the line S1P is
Answer» Two sources $S_{1} and S_{2}$ emitting light of wavelength $600 nm$ are placed a distance $1.0 \times 10^{- 2} cm$ apart. A detector can be moved on the line $S_{1} P$ , which is perpendicular to $S_{1} S_{2}$ . The maximum path difference at the detector as it is moved along the line $S_{1} P$ is

Discussion

50.	Two thin similar convex glass pieces are joined together front to front with its rear portion silvered such that a sharp image is formed 20 cm from themirror. When the air between the glass pieces is replaced by water (U water= 4/3), then the imageformed from the mirror is at a distance of(1) 8 cm(3) 6 cm(2) 10 cm(4) 12 cm
Answer» Two thin similar convex glass pieces are joined together front to front with its rear portion silvered such that a sharp image is formed 20 cm from themirror. When the air between the glass pieces is replaced by water (U water= 4/3), then the imageformed from the mirror is at a distance of(1) 8 cm(3) 6 cm(2) 10 cm(4) 12 cm

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A boy standing on a long railroad car throws a ball straight upwards with a speed of 10 m/s at t=0 when the car starts moving on a horizontal road with an acceleration of 1 m/s2. How far behind the boy will the ball fall on the car? (Take g=10 m/s2).

In the figure shown for gives of R1 and R2 the balance point for jockey is at 40 cm from A when R2 is shunted by a resistance of 10 Ω, balance point shifts to 50 cm from A,. Then R1,R2 are

A particle of mass m tied to a string is moving in a vertical circular path such that the speed is just sufficient to complete the circle . String is light then find the acceleration of particle when it reaches at point A.

A coil having N turns is wound tightly in the form of a spiral with inner and outer radii a and b respectively. When a current I passes through the coil, the magnetic field at the centre is

How would you justify the presence of 18 elements in the 5th Period of the periodic table?

ntThe casing of a rocket in flight burns up due to friction .At whose expense is the heat energy required for burning obtained?The rocket or the atmosphere?n

A galvanometer of 50 ohm has 25 divisions.A current of 4*10-4 A gives a deflection of one division.to convert this to a galvanometer having a range of 25 V it should be connected with a resistance of

What happens to the value of capacitance of a parallel plate capacitor when the distance between the two plates increases?

23What should be the anguiar speed with which the earth have to rotate on its axis so that a person ornthe equator would weigh 3/5 th as much as present?

What are wave equations,how to represent wave equation in a circle

The potentiometer wire AB shown in figure (32 - E27) is 50 cm long. When AD = 30 cm, no deflection occurs in the galvanometer. Find R

Focal length of the objective lens and the eyepiece of an astronomical telescope are 100 cm and 2 cm respectively. Find the angular magnification produced in the case of the least strain on the eye.

When forces F1, F2 and F3 are acting on a particle of mass m such that F2 and F3 are mutually perpendicular, then the particle remains stationary. If the force F1 is now removed then the acceleration of the particle is

A block of mass 5 kg is dropped on a vertical spring of spring constant 1200 N/m from a height of 10 m. Assuming that all the energy of the block is absorbed by the spring, what is the compression produced in the spring?(Take g=10 m/s2)

A jet of water is projected at an angle θ = 45∘ with horizontal from the point A which is situated at a distance x = OA = 12m from a vertical wall. If the speed of projection is v0 = √10 m/s , find the point P of striking of the water jet with the vertical wall.

A certain charge Q is to be divided into two parts q and Q−q. The relationship between Q and q placed at a certain distance apart to have the maximum Coulomb repulsion is

Centripetal force is present in both inertial and non inertial frame of reference then how centrifugal force is only present in non inertial frame of reference, it simply means that it is absent in inertial frame of reference , is it true?

1g H2 gas expand at STP to occupy double of its original volume. The work done during the process is(1) 260 cal(3) 130 cal26.(2) 180 cal(4) 270 cal

(a) In the following diagram 'S' is a semiconductor. Would you increase or decrease the value of R to keep the reading of the ammeter A constant when S is heated ? Give reason for your answer. (b) Draw the circuit of a photodiode and explain its working. Draw its I- V characteristics.

102.when one metre,one kg and one minute taken as fundamental units,the magnitude of a force is 36 units. What is the value of this force on cgs system?

Two tuning forks A and B vibrating simul†an eously produce 5 beats per second.Frequency of B is 512 Hz.If one arm of A is filed,the number of beats per seconds increases.Frequncy of A is?

A container has a small hole at its bottom. Area of cross-section of the hole is A1 and that of the container is A2. Liquid is poured into the container at a constant rate of Q m3/s. The maximum level of liquid in the container will be -

The electric potential at the surface of an atomic nucleus (Z=50) of radius 9×10−15 m is

Two sitar strings A and B playing the note ‘Ga’ are slightly out of tune and producebeats of frequency 6 Hz. The tension in the string A is slightly reduced and thebeat frequency is found to reduce to 3 Hz. If the original frequency of A is 324 Hz, what is the frequency of B?

The author of the passage develops her points about Johnson primarily by:

34.A particle is moving in a circle of radius r having centre o with a constant speed v.the magnitude of change in velocity moving from a to b is

An electron in Bohr's hydrogen atom has an energy of −3.4 eV. The angular momentum of the electron is

Find the velocity of image.

a rod of mass m and length is hinged to its one end and held vertical . a point mass m is attached to other end is allowed to rotate about the hinge .the velocity of rod when it becomes horizontal is

In the arrangement as shown, tension T2 is (g=10 m/s2)

A particle is moving in a horizontal circle with constant speed. It has constant

136.Angular velocity of wheel is 2 radian/second. Calculate the number of rotation of the wheel in 5 second

An ideal gas is taken from state A to the state B, as shown in the P−V diagram. The work done in the process is

The transfer function of a phase lead controller is 1+3Ts1+Ts. The maximum value of phase provided by this controller is

Question 1A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why?

Two sources S1 and S2 emitting light of wavelength 600 nm are placed a distance 1.0×10−2 cm apart. A detector can be moved on the line S1P, which is perpendicular to S1S2. The maximum path difference at the detector as it is moved along the line S1P is