50278 + Interview Questions in Physics

1.	A particle moves along the x-axis. Its velocity time-graph is given below.The particle changes its direction of acceleration, when
Answer» A particle moves along the x-axis. Its velocity time-graph is given below. The particle changes its direction of acceleration, when

Discussion

2.	18.Position time graph for a particle of mass 6kg moving along x axis is shown In the figure then impulse on the particle at t=2sec is
Answer» 18.Position time graph for a particle of mass 6kg moving along x axis is shown In the figure then impulse on the particle at t=2sec is

Discussion

3.	let C be the capaci†an ce of a capacitor discharging through a resis†an ce R. if t1 is the time taken for the charge to reduce to its 1/4th of the original valure and t2 be the time taken to reduce capaci†an ce to 1/2 of its value. then the ratio of t2/t1 is
Answer» let C be the capaci†an ce of a capacitor discharging through a resis†an ce R. if t1 is the time taken for the charge to reduce to its 1/4th of the original valure and t2 be the time taken to reduce capaci†an ce to 1/2 of its value. then the ratio of t2/t1 is

Discussion

4.	A pendulum bob has a speed of 3 m/s at its lowest position. The pendulum is 50 cm long. The speed of the bob, when the length makes an angle of 60∘ with the vertical, will be (g=10 m/s2)
Answer» A pendulum bob has a speed of $3 m/s$ at its lowest position. The pendulum is $50 cm$ long. The speed of the bob, when the length makes an angle of $60^{\circ}$ with the vertical, will be $(g = 10 {m/s}^{2})$

Discussion

5.	Find the value of x and y so that the vectors 2^i+3^j and x^i+y^j are equal.
Answer» Find the value of x and y so that the vectors $2^i + 3^j$ and $x^i + y^j$ are equal.

Discussion

6.	36. A bob weighing 50 grams hangs vertically at the end of string 50 cm long. If 20 gram force is applied horizontally, by how much distance the Bob is pulled aside from its initial position when it reaches in equilibrium position?
Answer» 36. A bob weighing 50 grams hangs vertically at the end of string 50 cm long. If 20 gram force is applied horizontally, by how much distance the Bob is pulled aside from its initial position when it reaches in equilibrium position?

Discussion

7.	The resistance of of the resistor R is connected to 25 volt supply the heat produced in it was 125 j/s find the value R
Answer» The resistance of of the resistor R is connected to 25 volt supply the heat produced in it was 125 j/s find the value R

Discussion

8.	A proton and an electron are accelerated by the same potential difference. Letλe and λp denote the de Broglie wavelengths of the electron and the proton respectively.
Answer» A proton and an electron are accelerated by the same potential difference. Let $λ_{e}$ and $λ_{p}$ denote the de Broglie wavelengths of the electron and the proton respectively.

Discussion

9.	In a Young's double slit experiment, the path difference, at a certain point on the screen, between two interfering waves is 18th of wavelength. The ratio of the intensity at this point to that at the centre of a bright fringe is close to:
Answer» In a Young's double slit experiment, the path difference, at a certain point on the screen, between two interfering waves is ${\frac{1}{8}}^{t h}$ of wavelength. The ratio of the intensity at this point to that at the centre of a bright fringe is close to:

Discussion

10.	In a region , uniform electric field is present as →E=E0^j and a uniform magnetic field is present as →B=−B0^k. An electron is released from rest at origin. Which of the following best represents the path followed by electron after release.
Answer» In a region , uniform electric field is present as $\to E = E_{0}^j$ and a uniform magnetic field is present as $\to B = - B_{0}^k$ . An electron is released from rest at origin. Which of the following best represents the path followed by electron after release.

Discussion

11.	Mutual inductance of between coaxial coils of same radius a and number of turns N1 & N2 if there centers are seperated by a distance l with l>>a is
Answer» Mutual inductance of between coaxial coils of same radius a and number of turns $N_{1} & N_{2}$ if there centers are seperated by a distance $l$ with $l >> a$ is

Discussion

12.	The relation between time t and distance x is t=αx2+βx where α and β are constants. The retardation is
Answer» The relation between time $t$ and distance $x$ is $t = α x^{2} + β x$ where $α$ and $β$ are constants. The retardation is

Discussion

13.	A mass m is hung on an ideal massless spring. Another equal mass is connected to the other end of the spring. The whole system is at rest. At t=0, m is released and the system falls freely under gravity. Assume that natural length of the spring is L0, its initial stretched length is L and the acceleration due to gravity is g. What is distance between masses as a function of time ?
Answer» A mass $m$ is hung on an ideal massless spring. Another equal mass is connected to the other end of the spring. The whole system is at rest. At $t = 0$ , $m$ is released and the system falls freely under gravity. Assume that natural length of the spring is $L_{0}$ , its initial stretched length is $L$ and the acceleration due to gravity is $g$ . What is distance between masses as a function of time ?

Discussion

14.	A tap fills one half of a bottle in 1 minute. Three fourth of the remaining in next 1 minute. If the remaining volume is 7m3, then find the volume of the bottle. [4 MARKS]
Answer» A tap fills one half of a bottle in 1 minute. Three fourth of the remaining in next 1 minute. If the remaining volume is 7 $m^{3}$ , then find the volume of the bottle. [4 MARKS]

Discussion

15.	The intensity of central fringe in the interference pattern produced by two identical slits is I. When one of the slits is closed then the intensity at the same point is I0. The relation between I and I0 is
Answer» The intensity of central fringe in the interference pattern produced by two identical slits is I. When one of the slits is closed then the intensity at the same point is $I_{0}$ . The relation between I and $I_{0}$ is

Discussion

16.	What is the dependence of resistivity on temperature for the following 1. Metals2. Conductors3. Semiconductors 4. Alloys5. Non metals
Answer» What is the dependence of resistivity on temperature for the following 1. Metals 2. Conductors 3. Semiconductors 4. Alloys 5. Non metals

Discussion

17.	At what absolute temperature T is the root mean square speed of a hydrogen molecule equal to its escape velocity from the surface of the moon? The radius of moon is R, g is the acceleration due to gravity on moon's surface, m is the mass of a hydrogen molecule and k is the Boltzmann constant
Answer» At what absolute temperature T is the root mean square speed of a hydrogen molecule equal to its escape velocity from the surface of the moon? The radius of moon is R, g is the acceleration due to gravity on moon's surface, m is the mass of a hydrogen molecule and k is the Boltzmann constant

Discussion

18.	Consider a fixed sphere of radius r. There is a ball of mass on the top of the sphere. We give ball a slight jerk. Calculate the angle at which ball loses contact with sphere
Answer» Consider a fixed sphere of radius r. There is a ball of mass on the top of the sphere. We give ball a slight jerk. Calculate the angle at which ball loses contact with sphere

Discussion

19.	What is Hyperbola?
Answer» What is Hyperbola?

Discussion

20.	As its clear that the boiling point of solid is more than liquid then why do land gets hot before the water.
Answer» As its clear that the boiling point of solid is more than liquid then why do land gets hot before the water.

Discussion

21.	A man weighing 60 kg is standing on a flat boat so that he is at a distance of 10 m from the shore. The boat weighs 20 kg and there is no friction between it and the water. If the man walks 4 m relative to the boat towards the shore and stops, then how far is the man from the shore?
Answer» A man weighing $60 kg$ is standing on a flat boat so that he is at a distance of $10 m$ from the shore. The boat weighs $20 kg$ and there is no friction between it and the water. If the man walks $4 m$ relative to the boat towards the shore and stops, then how far is the man from the shore?

Discussion

22.	The energy dissipated by a resistor is 10 mJ in 1 s when an electric current of 2 mA flows through it. The resistance is (in Ω). (Round off to the Nearest Integer)
Answer» The energy dissipated by a resistor is $10 mJ$ in $1 s$ when an electric current of $2 mA$ flows through it. The resistance is $(in Ω)$ . (Round off to the Nearest Integer)

Discussion

23.	If speed and density of a liquid coming out of a cylindrical pipe is increased to three times ,then the forcw required to hold thr pipe becomes?
Answer» If speed and density of a liquid coming out of a cylindrical pipe is increased to three times ,then the forcw required to hold thr pipe becomes?

Discussion

24.	A 60 pF capacitor is fully charged by a 20 V supply. It is then disconnected from the supply and is connected to another uncharged 60 pF capacitor in parallel. The Electrostatic energy that is lost in this process by the time the charge is redistributed between them is (in nJ)
Answer» A $60 pF$ capacitor is fully charged by a $20 V$ supply. It is then disconnected from the supply and is connected to another uncharged $60 pF$ capacitor in parallel. The Electrostatic energy that is lost in this process by the time the charge is redistributed between them is $(in nJ)$

Discussion

25.	A geyser heats water flowing at the rate of 3.0 litres per minute from 27 °C to 77 °C. If the geyser operates on a gas burner, what is the rate of consumption of the fuel if its heat of combustion is 4.0 × 10⁴ J/g ?
Answer» A geyser heats water flowing at the rate of 3.0 litres per minute from 27 °C to 77 °C. If the geyser operates on a gas burner, what is the rate of consumption of the fuel if its heat of combustion is 4.0 × 10⁴ J/g ?

Discussion

26.	A 8000 kg engine pulls a train of five wagons each of 2000 kg along a horizontal track. If the engine exerts a force of 40000 N and the track offers a Friction force of 5000N,then calculate : a. The net accelerating force ; b. The acceleration of the train ; and c. The force of wagon 1 on wagon 2
Answer» A 8000 kg engine pulls a train of five wagons each of 2000 kg along a horizontal track. If the engine exerts a force of 40000 N and the track offers a Friction force of 5000N,then calculate : a. The net accelerating force ; b. The acceleration of the train ; and c. The force of wagon 1 on wagon 2

Discussion

27.	The following bodies :1. a ring2. a disc3. a solid cylinder4. a solid sphereof mass ′m′ and radius ′R′ are allowed to roll down without slipping simultaneously from the top of the inclined plane. The body which will reach first at the bottom of the inclined plane is _______.(Mark the body as per their respective numbering given in the question)
Answer» The following bodies : 1. a ring 2. a disc 3. a solid cylinder 4. a solid sphere of mass $^{'} m^{'}$ and radius $^{'} R^{'}$ are allowed to roll down without slipping simultaneously from the top of the inclined plane. The body which will reach first at the bottom of the inclined plane is _______. $($ Mark the body as per their respective numbering given in the question $)$

Discussion

28.	A body of mass m crosses the topmost point of a vertical circle with critical speed. What is the torque about the centre at this instant?
Answer» A body of mass m crosses the topmost point of a vertical circle with critical speed. What is the torque about the centre at this instant?

Discussion

29.	What happens when the light ray is falling perpendicular on the refracting surface?
Answer» What happens when the light ray is falling perpendicular on the refracting surface?

Discussion

30.	A bullet moving with a velocity of 100 m/s can just penetrate two planks of equal thickness. The number of such planks penetrated by the same bullet, when the velocity is doubled, will be
Answer» A bullet moving with a velocity of 100 m/s can just penetrate two planks of equal thickness. The number of such planks penetrated by the same bullet, when the velocity is doubled, will be

Discussion

31.	79.A bar magnet of magnetic moment M is cut as shown in figure .Then magnetic moment of part B is
Answer» 79.A bar magnet of magnetic moment M is cut as shown in figure .Then magnetic moment of part B is

Discussion

32.	The number of octahedral sites per sphere in FCC is
Answer» The number of octahedral sites per sphere in FCC is

Discussion

33.	38.The value of current I and collage V in the given circuit will be: A) 2A, 4V B) 4A, 2V C) 1A, 2V D) 2A, 1V
Answer» 38.The value of current I and collage V in the given circuit will be: A) 2A, 4V B) 4A, 2V C) 1A, 2V D) 2A, 1V

Discussion

34.	A 20 mH inductor, a 100 μF capacitor and a 50 Ω resistor are connected in series across a source, whose voltage is given by, V=10sin(314t). The active power of the circuit is -
Answer» A $20 mH$ inductor, a $100 μ F$ capacitor and a $50 Ω$ resistor are connected in series across a source, whose voltage is given by, $V = 10 sin (314 t)$ . The active power of the circuit is -

Discussion

35.	14.A particle moves with uniform acceleration along straight line AB. It's velocity at A and B are 2 m/s.and14m/s. M is the mid point of AB. The particle takes t1 sec to go from A to M and t2 sec to go from M to B. Then t2:t1 is: 1)1:1 2)2:1 3)1:2 4)3:1
Answer» 14.A particle moves with uniform acceleration along straight line AB. It's velocity at A and B are 2 m/s.and14m/s. M is the mid point of AB. The particle takes t1 sec to go from A to M and t2 sec to go from M to B. Then t2:t1 is: 1)1:1 2)2:1 3)1:2 4)3:1

Discussion

36.	If motion of a particle is represented by s=et+4t3−cost, then the acceleration of the particle at any time t is[Hint: Acceleration of the particle is d2sdt2]
Answer» If motion of a particle is represented by $s = e^{t} + 4 t^{3} - cos t$ , then the acceleration of the particle at any time $t$ is [Hint: Acceleration of the particle is $\frac{d^{2} s}{d t^{2}}$ ]

Discussion

37.	Water drops are falling from a ceiling of height 5 m at a regular interval of 0.2 second. What is the speed of 3rd drop, when 1st drop just hitting the ground? (g 10 ms-2) (1) 4 ms-1 (3) 5 ms-1 (2) 6 ms- (4) 8 ms-1
Answer» Water drops are falling from a ceiling of height 5 m at a regular interval of 0.2 second. What is the speed of 3rd drop, when 1st drop just hitting the ground? (g 10 ms-2) (1) 4 ms-1 (3) 5 ms-1 (2) 6 ms- (4) 8 ms-1

Discussion

38.	What is dimension?
Answer» What is dimension?

Discussion

39.	A metre stick is held vertically with one end on a rough horizontal floor. It is gently allowed to fall on the floor. Assuming that the end at the floor does not slip, find the angular speed of the rod when it hits the floor.
Answer» A metre stick is held vertically with one end on a rough horizontal floor. It is gently allowed to fall on the floor. Assuming that the end at the floor does not slip, find the angular speed of the rod when it hits the floor.

Discussion

40.	A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. What is the work done in pulling the entire chain on the table? (g=10ms2)
Answer» A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. What is the work done in pulling the entire chain on the table? $(g = 10 \frac{m}{s^{2}})$

Discussion

41.	The exhaust velocity of the gases coming out of a rocket is 350 m/s w.r.t the rocket. The rocket can burn fuel at a rate of 80 kg/s. For a successful launch, the desired acceleration of the rocket is 4 m/s2. What is the initial total mass of this rocket? (Take g=10 m/s2)
Answer» The exhaust velocity of the gases coming out of a rocket is $350 m/s$ w.r.t the rocket. The rocket can burn fuel at a rate of $80 kg/s$ . For a successful launch, the desired acceleration of the rocket is $4 {m/s}^{2}$ . What is the initial total mass of this rocket? (Take $g = 10 {m/s}^{2}$ )

Discussion

42.	12.A charge of 20 μ C is placed at the centre of an open and cylindrical vessel. The net flux through the cylinder is
Answer» 12.A charge of 20 μ C is placed at the centre of an open and cylindrical vessel. The net flux through the cylinder is

Discussion

43.	A particle of mass 100 g moving at an initial speed u collides with another particle of same mass kept initially at rest. If the total kinetic energy becomes 0.2 J after the collision, what could be the maximum and the minimum value of u.
Answer» A particle of mass 100 g moving at an initial speed u collides with another particle of same mass kept initially at rest. If the total kinetic energy becomes 0.2 J after the collision, what could be the maximum and the minimum value of u.

Discussion

44.	Diatomic molecule,KBr has dipole moment 2.4 and intermolecular distance is 100pm.the percentage of electronic charge existing on More electronegative atom is
Answer» Diatomic molecule,KBr has dipole moment 2.4 and intermolecular distance is 100pm.the percentage of electronic charge existing on More electronegative atom is

Discussion

45.	A stationary observer receive sound from two identical tuning forks, one of which approaches and the other one recedes with the same speed (much less than the speed of sound). The observer hears 2 beats per second. The oscillation frequency of each tuning fork is f0=1400 Hz and the velocity of sound in air is 350 ms−1. The speed of each tuning fork is close to:
Answer» A stationary observer receive sound from two identical tuning forks, one of which approaches and the other one recedes with the same speed (much less than the speed of sound). The observer hears $2$ beats per second. The oscillation frequency of each tuning fork is $f_{0} = 1400 Hz$ and the velocity of sound in air is $350 {ms}^{- 1}$ . The speed of each tuning fork is close to:

Discussion

46.	A piece of plane glass is placed on a word with letters of different colours. The letter which appear minimum raised. 1.red 2.green 3.yellow. 4.violet
Answer» A piece of plane glass is placed on a word with letters of different colours. The letter which appear minimum raised. 1.red 2.green 3.yellow. 4.violet

Discussion

47.	What is meant by " NORMAL REACTION " in simple words ?
Answer» What is meant by " NORMAL REACTION " in simple words ?

Discussion

48.	Four rods of equal mass m and length L forms a square ABCD as shown in the figure. The moment of inertia of ABCD about the axis OO' passing through the point A lying in the plane of square is
Answer» Four rods of equal mass m and length L forms a square ABCD as shown in the figure. The moment of inertia of ABCD about the axis OO' passing through the point A lying in the plane of square is

Discussion

49.	Write the truth tablefor the circuits given in Fig. 14.48 consisting of NOR gates only.Identify the logic operations (OR, AND, NOT) performed by the twocircuits.
Answer» Write the truth table for the circuits given in Fig. 14.48 consisting of NOR gates only. Identify the logic operations (OR, AND, NOT) performed by the two circuits.

49.

Write the truth tablefor the circuits given in Fig. 14.48 consisting of NOR gates only.Identify the logic operations (OR, AND, NOT) performed by the twocircuits.

Answer»

Write the truth table
for the circuits given in Fig. 14.48 consisting of NOR gates only.
Identify the logic operations (OR, AND, NOT) performed by the two
circuits.

Discussion

50.	A taxi leaves the station X for station Y every 10 minutes . Simultaneously a taxi leaves the station Y also for station X every 10 minutes . The taxis move at the same constant speed and go from X and Y or vice versa in 2 hours . How many taxis coming from the other side will each taxi meet enroute from Y and X
Answer» A taxi leaves the station X for station Y every 10 minutes . Simultaneously a taxi leaves the station Y also for station X every 10 minutes . The taxis move at the same constant speed and go from X and Y or vice versa in 2 hours . How many taxis coming from the other side will each taxi meet enroute from Y and X

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A particle moves along the x-axis. Its velocity time-graph is given below.The particle changes its direction of acceleration, when

18.Position time graph for a particle of mass 6kg moving along x axis is shown In the figure then impulse on the particle at t=2sec is

let C be the capaci†an ce of a capacitor discharging through a resis†an ce R. if t1 is the time taken for the charge to reduce to its 1/4th of the original valure and t2 be the time taken to reduce capaci†an ce to 1/2 of its value. then the ratio of t2/t1 is

A pendulum bob has a speed of 3 m/s at its lowest position. The pendulum is 50 cm long. The speed of the bob, when the length makes an angle of 60∘ with the vertical, will be (g=10 m/s2)

Find the value of x and y so that the vectors 2^i+3^j and x^i+y^j are equal.

36. A bob weighing 50 grams hangs vertically at the end of string 50 cm long. If 20 gram force is applied horizontally, by how much distance the Bob is pulled aside from its initial position when it reaches in equilibrium position?

The resistance of of the resistor R is connected to 25 volt supply the heat produced in it was 125 j/s find the value R

A proton and an electron are accelerated by the same potential difference. Letλe and λp denote the de Broglie wavelengths of the electron and the proton respectively.

In a Young's double slit experiment, the path difference, at a certain point on the screen, between two interfering waves is 18th of wavelength. The ratio of the intensity at this point to that at the centre of a bright fringe is close to:

In a region , uniform electric field is present as →E=E0^j and a uniform magnetic field is present as →B=−B0^k. An electron is released from rest at origin. Which of the following best represents the path followed by electron after release.

Mutual inductance of between coaxial coils of same radius a and number of turns N1 &amp; N2 if there centers are seperated by a distance l with l&gt;&gt;a is

The relation between time t and distance x is t=αx2+βx where α and β are constants. The retardation is

A tap fills one half of a bottle in 1 minute. Three fourth of the remaining in next 1 minute. If the remaining volume is 7m3, then find the volume of the bottle. [4 MARKS]

The intensity of central fringe in the interference pattern produced by two identical slits is I. When one of the slits is closed then the intensity at the same point is I0. The relation between I and I0 is

What is the dependence of resistivity on temperature for the following 1. Metals2. Conductors3. Semiconductors 4. Alloys5. Non metals

At what absolute temperature T is the root mean square speed of a hydrogen molecule equal to its escape velocity from the surface of the moon? The radius of moon is R, g is the acceleration due to gravity on moon's surface, m is the mass of a hydrogen molecule and k is the Boltzmann constant

Consider a fixed sphere of radius r. There is a ball of mass on the top of the sphere. We give ball a slight jerk. Calculate the angle at which ball loses contact with sphere

What is Hyperbola?

As its clear that the boiling point of solid is more than liquid then why do land gets hot before the water.

A man weighing 60 kg is standing on a flat boat so that he is at a distance of 10 m from the shore. The boat weighs 20 kg and there is no friction between it and the water. If the man walks 4 m relative to the boat towards the shore and stops, then how far is the man from the shore?

The energy dissipated by a resistor is 10 mJ in 1 s when an electric current of 2 mA flows through it. The resistance is (in Ω). (Round off to the Nearest Integer)

If speed and density of a liquid coming out of a cylindrical pipe is increased to three times ,then the forcw required to hold thr pipe becomes?

A 60 pF capacitor is fully charged by a 20 V supply. It is then disconnected from the supply and is connected to another uncharged 60 pF capacitor in parallel. The Electrostatic energy that is lost in this process by the time the charge is redistributed between them is (in nJ)

A geyser heats water flowing at the rate of 3.0 litres per minute from 27 °C to 77 °C. If the geyser operates on a gas burner, what is the rate of consumption of the fuel if its heat of combustion is 4.0 × 10⁴ J/g ?

A 8000 kg engine pulls a train of five wagons each of 2000 kg along a horizontal track. If the engine exerts a force of 40000 N and the track offers a Friction force of 5000N,then calculate : a. The net accelerating force ; b. The acceleration of the train ; and c. The force of wagon 1 on wagon 2

A body of mass m crosses the topmost point of a vertical circle with critical speed. What is the torque about the centre at this instant?

What happens when the light ray is falling perpendicular on the refracting surface?

A bullet moving with a velocity of 100 m/s can just penetrate two planks of equal thickness. The number of such planks penetrated by the same bullet, when the velocity is doubled, will be

79.A bar magnet of magnetic moment M is cut as shown in figure .Then magnetic moment of part B is

The number of octahedral sites per sphere in FCC is

38.The value of current I and collage V in the given circuit will be: A) 2A, 4V B) 4A, 2V C) 1A, 2V D) 2A, 1V

A 20 mH inductor, a 100 μF capacitor and a 50 Ω resistor are connected in series across a source, whose voltage is given by, V=10sin(314t). The active power of the circuit is -

14.A particle moves with uniform acceleration along straight line AB. It's velocity at A and B are 2 m/s.and14m/s. M is the mid point of AB. The particle takes t1 sec to go from A to M and t2 sec to go from M to B. Then t2:t1 is: 1)1:1 2)2:1 3)1:2 4)3:1

If motion of a particle is represented by s=et+4t3−cost, then the acceleration of the particle at any time t is[Hint: Acceleration of the particle is d2sdt2]

Water drops are falling from a ceiling of height 5 m at a regular interval of 0.2 second. What is the speed of 3rd drop, when 1st drop just hitting the ground? (g 10 ms-2) (1) 4 ms-1 (3) 5 ms-1 (2) 6 ms- (4) 8 ms-1

What is dimension?

A metre stick is held vertically with one end on a rough horizontal floor. It is gently allowed to fall on the floor. Assuming that the end at the floor does not slip, find the angular speed of the rod when it hits the floor.

A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. What is the work done in pulling the entire chain on the table? (g=10ms2)

The exhaust velocity of the gases coming out of a rocket is 350 m/s w.r.t the rocket. The rocket can burn fuel at a rate of 80 kg/s. For a successful launch, the desired acceleration of the rocket is 4 m/s2. What is the initial total mass of this rocket? (Take g=10 m/s2)

12.A charge of 20 μ C is placed at the centre of an open and cylindrical vessel. The net flux through the cylinder is

A particle of mass 100 g moving at an initial speed u collides with another particle of same mass kept initially at rest. If the total kinetic energy becomes 0.2 J after the collision, what could be the maximum and the minimum value of u.

Diatomic molecule,KBr has dipole moment 2.4 and intermolecular distance is 100pm.the percentage of electronic charge existing on More electronegative atom is

A piece of plane glass is placed on a word with letters of different colours. The letter which appear minimum raised. 1.red 2.green 3.yellow. 4.violet

What is meant by " NORMAL REACTION " in simple words ?

Four rods of equal mass m and length L forms a square ABCD as shown in the figure. The moment of inertia of ABCD about the axis OO' passing through the point A lying in the plane of square is

Write the truth tablefor the circuits given in Fig. 14.48 consisting of NOR gates only.Identify the logic operations (OR, AND, NOT) performed by the twocircuits.

Mutual inductance of between coaxial coils of same radius a and number of turns N1 & N2 if there centers are seperated by a distance l with l>>a is