50278 + Interview Questions in Physics

1.	Two identical cylindrical vessels are kept on the ground and each contain the same liquid of density d. The area of the base of both vessels is S but the height of liquid in one vessel is x1 and in the other, x2. When both cylinders are connected through a pipe of negligible volume, very close to the bottom, the liquid flows from one vessel to the other until it comes to equilibrium at a new height. The change in energy of the system in the process is:
Answer» Two identical cylindrical vessels are kept on the ground and each contain the same liquid of density $d$ . The area of the base of both vessels is $S$ but the height of liquid in one vessel is $x_{1}$ and in the other, $x_{2}$ . When both cylinders are connected through a pipe of negligible volume, very close to the bottom, the liquid flows from one vessel to the other until it comes to equilibrium at a new height. The change in energy of the system in the process is:

Discussion

2.	A body is thrown horizontally from the top of a tower of height 5 m. It touches the ground at a distance of 10 m from the foot of the tower. The initial velocity of the body is (g = 10 ms−2)
Answer» A body is thrown horizontally from the top of a tower of height 5 m. It touches the ground at a distance of 10 m from the foot of the tower. The initial velocity of the body is (g = 10 $m s^{- 2}$ )

Discussion

3.	Total degree of kinematic indeterminacy of the plane frame shown in the figure below, is 28
Answer» Total degree of kinematic indeterminacy of the plane frame shown in the figure below, is 28

Discussion

4.	A bar magnet of magnetic moment 104 J/T is free to rotate in a horizontal plane. The work done in rotating the magnet slowly from a direction parallel to a horizontal magnetic field of 4×10−5 T to a direction 60∘ from the field will be
Answer» A bar magnet of magnetic moment $10^{4} J/T$ is free to rotate in a horizontal plane. The work done in rotating the magnet slowly from a direction parallel to a horizontal magnetic field of $4 \times 10^{- 5} T$ to a direction $60^{\circ}$ from the field will be

Discussion

5.	A car of mass 1000 kg is moving with the speed 40 m/s on a circular path of radius 400 m. If its speed is increasing at the rate of 3 ms−2 the total force acting on the car is
Answer» A car of mass $1000 kg$ is moving with the speed $40 m/s$ on a circular path of radius $400 m$ . If its speed is increasing at the rate of $3 m s^{- 2}$ the total force acting on the car is

Discussion

6.	Which of the following options represents incorrect ray diagram for a concave mirror?
Answer» Which of the following options represents incorrect ray diagram for a concave mirror?

Discussion

7.	A bullet of mass 10 g moving horizontally with a velocity of 400 m/s strikes a wooden block of mass 2 kg which is suspended by a light inextensible string of length 5 m. As a result, the centre of gravity of the block is found to rise a vertical distance of 10 cm. The speed of the bullet after it emerges out horizontally from the block will be
Answer» A bullet of mass $10 g$ moving horizontally with a velocity of $400 m / s$ strikes a wooden block of mass $2 k g$ which is suspended by a light inextensible string of length $5 m$ . As a result, the centre of gravity of the block is found to rise a vertical distance of $10 c m$ . The speed of the bullet after it emerges out horizontally from the block will be

Discussion

8.	A soap bubble having radius 1 mm is blown from a detergent solution having a surface tension of 2.5×10−2 N/m. The pressure inside the bubble is equal to the pressure at a point which is Z0 below the free surface of water in a container. Find the value of Z0 . Taking g = 10 m/s2, density of water = 103 kg/m3
Answer» A soap bubble having radius $1 m m$ is blown from a detergent solution having a surface tension of $2.5 \times 10^{- 2} N / m$ . The pressure inside the bubble is equal to the pressure at a point which is $Z_{0}$ below the free surface of water in a container. Find the value of $Z_{0}$ . Taking $g = 10 m / s^{2}$ , density of water = $10^{3} k g / m^{3}$

Discussion

9.	→A=2^i+^j,3^j−^k and →C=6^i−2^k. Value of →A−2→B+3→C would be
Answer» $\to A = 2^i +^j, 3^j -^k$ and $\to C = 6^i - 2^k$ . Value of $\to A - 2 \to B + 3 \to C$ would be

Discussion

10.	A signal of 0.1 kW is transmitted in a cable. The attenuation of cable is −5 dB per km and cable length is 20 km. The power received at receiver is 10−x W. The value of x is .[Gain in dB=10log10(P0Pi)]
Answer» A signal of $0.1 kW$ is transmitted in a cable. The attenuation of cable is $- 5 dB$ per $km$ and cable length is $20 km$ . The power received at receiver is $10^{- x} W$ . The value of $x$ is . [Gain in $d B = 10 {log}_{10} (\frac{P_{0}}{P_{i}})$ ]

Discussion

11.	a 250 turns rec†an gular coil of length 2.1cm and 1.25cm width carries a current of 85meuA and subjected to a magnetic field of strength 0.85T workdone for rotatingthe coil by 180^° against the torque i
Answer» a 250 turns rec†an gular coil of length 2.1cm and 1.25cm width carries a current of 85meuA and subjected to a magnetic field of strength 0.85T workdone for rotatingthe coil by 180^° against the torque i

Discussion

12.	The monkey B shown in the figure is holding onto the tail of the monkey A which is climbing up a rope. The masses of monkeys A and B are 5 kg and 2 kg respectively. If A can tolerate a tension of 30 N in its tail, what force should it apply on the rope in order to carry the monkey B with it ? (take g=10 m/s2)
Answer» The monkey $B$ shown in the figure is holding onto the tail of the monkey $A$ which is climbing up a rope. The masses of monkeys $A$ and $B$ are $5 kg$ and $2 kg$ respectively. If $A$ can tolerate a tension of $30 N$ in its tail, what force should it apply on the rope in order to carry the monkey $B$ with it ? (take $g = 10 {m/s}^{2}$ )

Discussion

13.	Integral x0 to x (dx) = integral 0 to t ( v dt ) = integral 0 to t ( v0 +at ) dt x-x0 =v0 t + 1/2 at2 . This is my confused part How we reached🔼 . Please explain
Answer» Integral x₀ to x (dx) = integral 0 to t ( v dt ) = integral 0 to t ( v₀+at ) dt x-x_{0 =}v₀t + 1/2 at^{2 .}This is my confused part How we reached🔼 . Please explain

13.

Integral x0 to x (dx) = integral 0 to t ( v dt ) = integral 0 to t ( v0 +at ) dt x-x0 =v0 t + 1/2 at2 . This is my confused part How we reached🔼 . Please explain

Answer»

Integral x₀ to x (dx) = integral 0 to t ( v dt )

= integral 0 to t ( v₀+at ) dt x-x_{0 =}v₀t + 1/2 at^{2 .}This is my confused part

How we reached🔼 . Please explain

Discussion

14.	Himanshu went out for a long drive on a weekend. From 10:00 PM to 11:00 PM, he drove at 40 km/h and from 11:00 PM to 12:00 AM, at 50 km/h.Select the graph that represents his motion correctly.
Answer» Himanshu went out for a long drive on a weekend. From $10 : 00 PM$ to $11 : 00 PM$ , he drove at $40 km/h$ and from $11 : 00 PM$ to $12 : 00 AM$ , at $50 km/h$ . Select the graph that represents his motion correctly.

Discussion

15.	Two capacitors 2 μF and 6 μF in series are connected in parallel to a third capacitor of 4 μF. This arrangement is then connected to a battery of emf 2 V. Find the total energy of system of capacitors?
Answer» Two capacitors $2 μ F$ and $6 μ F$ in series are connected in parallel to a third capacitor of $4 μ F$ . This arrangement is then connected to a battery of emf $2 V$ . Find the total energy of system of capacitors?

Discussion

16.	write the dimensional formula for torque and angular momentum.
Answer» write the dimensional formula for torque and angular momentum.

Discussion

17.	20∫−10sin{x}dx (where {x} denotes the fractional part of x equals
Answer» $20 \int - 10 sin {x} d x$ (where ${x}$ denotes the fractional part of $x$ equals

Discussion

18.	The binding energy of the innermost electron in tungsten is 40 keV. To produce characteristic X-rays using a tungsten target in an X-rays tube the potential difference V between the cathode and the anti-cathode should be
Answer» The binding energy of the innermost electron in tungsten is 40 keV. To produce characteristic X-rays using a tungsten target in an X-rays tube the potential difference V between the cathode and the anti-cathode should be

Discussion

19.	An object is launched at a velocity of 20 m/s in a direction making an angle of 30∘ upward with the horizontal. What is the total flight time (between launch and touching the ground) of the object? (Take g=10 m/s2)
Answer» An object is launched at a velocity of $20 m / s$ in a direction making an angle of $30^{\circ}$ upward with the horizontal. What is the total flight time (between launch and touching the ground) of the object? (Take $g = 10 m / s^{2}$ )

Discussion

20.	In the above problem, if we consider the two masses to be a system, the tension is an external force.
Answer» In the above problem, if we consider the two masses to be a system, the tension is an external force.

Discussion

21.	Impedance Z as shown in the given figure is
Answer» Impedance Z as shown in the given figure is

Discussion

22.	If gravitational force can reach beyond the solar system then why it is the weakest among all fundamental force and what makes it weak?
Answer» If gravitational force can reach beyond the solar system then why it is the weakest among all fundamental force and what makes it weak?

Discussion

23.	2.Cp and Cv denote the molar specific heat capacities of a gas at constant pressure and constant volume respectively.Then
Answer» 2.Cp and Cv denote the molar specific heat capacities of a gas at constant pressure and constant volume respectively.Then

Discussion

24.	A moving coil galvanometer has a coil with 175 turns and area 1 cm2. It uses a torsion band of torsion constant 10−6 Nm rad−1. The coil is placed in a magnetic field B parallel to its plane. The coil deflects by 1∘ for a current of 1 mA. The value of B (in T) is approximately-
Answer» A moving coil galvanometer has a coil with $175$ turns and area $1 {cm}^{2} .$ It uses a torsion band of torsion constant $10^{- 6} {Nm rad}^{- 1} .$ The coil is placed in a magnetic field $B$ parallel to its plane. The coil deflects by $1^{\circ}$ for a current of $1 mA .$ The value of $B (in T)$ is approximately-

Discussion

25.	A circular coil of radius 2.5 cm carries current of 2 A. If the coil has 50 turns. Find the magnetic field at the center of the coil ?<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--><!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->
Answer» A circular coil of radius $2.5 cm$ carries current of $2 A$ . If the coil has $50$ turns. Find the magnetic field at the center of the coil ? <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->

Discussion

26.	A uniform magnetic field exists in region which forms an equilateral triangle of side a. The magnetic field is perpendicular to the plane of the triangle. A charge q enters into the magnetic field perpendicularly with speed v along perpendicular bisector of one side. The value the magnetic field is ? (Assume that width of magnetic field region is small to complete full circular path).
Answer» A uniform magnetic field exists in region which forms an equilateral triangle of side $a$ . The magnetic field is perpendicular to the plane of the triangle. A charge $q$ enters into the magnetic field perpendicularly with speed $v$ along perpendicular bisector of one side. The value the magnetic field is ? (Assume that width of magnetic field region is small to complete full circular path).

Discussion

27.	A particle executes harmonic motion with an angular velocity and maximum acceleration of 3.5 rad/sec and 7.5 m/s2 respectively. The amplitude of oscillation is [AIIMS 1999; Pb. PET 1999]
Answer» A particle executes harmonic motion with an angular velocity and maximum acceleration of 3.5 rad/sec and 7.5 m/ $s^{2}$ respectively. The amplitude of oscillation is [AIIMS 1999; Pb. PET 1999]

27.

A particle executes harmonic motion with an angular velocity and maximum acceleration of 3.5 rad/sec and 7.5 m/s2 respectively. The amplitude of oscillation is [AIIMS 1999; Pb. PET 1999]

Answer»

A particle executes harmonic motion with an angular velocity and maximum acceleration of 3.5 rad/sec and 7.5 m/ $s^{2}$ respectively. The amplitude of oscillation is

[AIIMS 1999; Pb. PET 1999]

Discussion

28.	Particle A of mass m1 moving with velocity (√3^i+^j) ms−1 collides with another partice B of mass m2 which is at rest initially. Let →V1 and →V2 be the velocities of particles A and B after collision respectively. If m1=2m2 and after collision →V1=(^i+√3^j)ms−1, the angle between →V1 and →V2 is :
Answer» Particle $A$ of mass $m_{1}$ moving with velocity $(\sqrt{3}^i +^j) m s^{- 1}$ collides with another partice $B$ of mass $m_{2}$ which is at rest initially. Let $_{1}$ and $_{2}$ be the velocities of particles $A$ and $B$ after collision respectively. If $m_{1} = 2 m_{2}$ and after collision $_{1} = (^i + \sqrt{3}^j) m s^{- 1},$ the angle between $_{1}$ and $_{2}$ is :

Discussion

29.	what are conduction bands and valence bands ? how do they decide the resis†an ce offered by a materia
Answer» what are conduction bands and valence bands ? how do they decide the resis†an ce offered by a materia

Discussion

30.	A man of 50 kg mass is standing in a gravity freespace at a height of 10 m above the floor. Hethrows a stone of 0.5 kg mass downwards with aspeed 2 m/s. When the stone reaches the floor,the distance of the man above the floor will be
Answer» A man of 50 kg mass is standing in a gravity freespace at a height of 10 m above the floor. Hethrows a stone of 0.5 kg mass downwards with aspeed 2 m/s. When the stone reaches the floor,the distance of the man above the floor will be

Discussion

31.	Two long straight parallel wires ,carrying (adjustable) currents I1 and I2 are kept at a distance d apart .If the force F between the two wires is taken as positive when the wires repel each other and negative when the wires attract each other,the graph showing the dependence of F, on the product I1×I2 ,would be
Answer» Two long straight parallel wires ,carrying (adjustable) currents I1 and I2 are kept at a distance d apart .If the force F between the two wires is taken as positive when the wires repel each other and negative when the wires attract each other,the graph showing the dependence of F, on the product I1×I2 ,would be

Discussion

32.	A rigid ball of mass m strikes a rigid wall at 60∘ and gets reflected without loss of speed as shown in the figure. The value of impulse imparted by the wall on the ball will be
Answer» A rigid ball of mass $m$ strikes a rigid wall at $60^{\circ}$ and gets reflected without loss of speed as shown in the figure. The value of impulse imparted by the wall on the ball will be

Discussion

33.	A particle A is projected with speed VA from a point making an angle 60∘ with horizontal. At the same instant, a second particle B is thrown vertically upwards from a point directly below the maximum height point of parabolic path of A, with velocity VB. If the two particles collide then the ratio of VAVB should be
Answer» A particle A is projected with speed $V_{A}$ from a point making an angle $60^{\circ}$ with horizontal. At the same instant, a second particle B is thrown vertically upwards from a point directly below the maximum height point of parabolic path of A, with velocity $V_{B}$ . If the two particles collide then the ratio of $\frac{V_{A}}{V_{B}}$ should be

Discussion

34.	A source of sound S is moving with a velocity of 50 m/s towards a stationary observer. The observer measures the frequency of the source as 1000 Hz. What will be the apparent frequency of the source when it is moving away from the observer after crossing him? (Take velocity of sound in air 350 m/s)
Answer» A source of sound $S$ is moving with a velocity of $50 m/s$ towards a stationary observer. The observer measures the frequency of the source as $1000 Hz$ . What will be the apparent frequency of the source when it is moving away from the observer after crossing him? (Take velocity of sound in air $350 m/s)$

Discussion

35.	A ball falls on an inclined plane of inclination θ=30∘ from a height h=10 m above the point of impact and makes a perfectly elastic collision. Find the distance where will it hit the plane again from the initial point of impact. (Take g=10 m/s2)
Answer» A ball falls on an inclined plane of inclination $θ = 30^{\circ}$ from a height $h = 10 m$ above the point of impact and makes a perfectly elastic collision. Find the distance where will it hit the plane again from the initial point of impact. $(Take g = 10 {m/s}^{2})$

Discussion

36.	A capacitor of capacitance C' is charged to a potential V" and isolated. A small capacitor C is then charged from C' , discharged and charged again the process being repeated in n times due to this potential of larger capacitor C' is decreased to V. Find the value of C.
Answer» A capacitor of capacitance C' is charged to a potential V" and isolated. A small capacitor C is then charged from C' , discharged and charged again the process being repeated in n times due to this potential of larger capacitor C' is decreased to V. Find the value of C.

Discussion

37.	how to convert more than ogive into less than ogive ?
Answer» how to convert more than ogive into less than ogive ?

Discussion

38.	What is the net charge on a conducting sphere of radius 10 cm? Given that the electric field from the center of sphere is equal to 3×10^3N/C and is directed inward
Answer» What is the net charge on a conducting sphere of radius 10 cm? Given that the electric field from the center of sphere is equal to 3×10^3N/C and is directed inward

Discussion

39.	Air enters a compressor at atmospheric temperature and pressure of 1 bar and 30°C. It leaves the compressor at 4.9 bar, 181°C and 90 m/s. The isothermal efficiency of compressor is____ %. (Neglect inlet velocity and potential energy.) (Take cp = 1.005 kJ/kgK, R=0.287 kJ/kgK) 91.3
Answer» Air enters a compressor at atmospheric temperature and pressure of 1 bar and 30°C. It leaves the compressor at 4.9 bar, 181°C and 90 m/s. The isothermal efficiency of compressor is____ %. (Neglect inlet velocity and potential energy.) (Take $c_{p}$ = 1.005 kJ/kgK, R=0.287 kJ/kgK) 91.3

Discussion

40.	Find the Requivalent.
Answer» Find the $R_{e q u i v a l e n t}$ .

Discussion

41.	Four massless springs whose force constants are 2k, 2k, k and 2k respectively are attached to a mass M kept on a frictionless plane (as shown in figure). If the mass M is displaced in the horizontal direction, then the frequency of the system is
Answer» Four massless springs whose force constants are 2k, 2k, k and 2k respectively are attached to a mass M kept on a frictionless plane (as shown in figure). If the mass M is displaced in the horizontal direction, then the frequency of the system is

41.

Four massless springs whose force constants are 2k, 2k, k and 2k respectively are attached to a mass M kept on a frictionless plane (as shown in figure). If the mass M is displaced in the horizontal direction, then the frequency of the system is

Answer» Four massless springs whose force constants are 2k, 2k, k and 2k respectively are attached to a mass M kept on a frictionless plane (as shown in figure). If the mass M is displaced in the horizontal direction, then the frequency of the system is

Discussion

42.	Two identical spheres each of mass 1.20 kg and radius 10.0 cm are fixed at the ends of a light rod so that the separation between the centres is 50.0 cm. Find the moment of intertia of the system about an axis perpendicular to the rod passing through its middle point.
Answer» Two identical spheres each of mass 1.20 kg and radius 10.0 cm are fixed at the ends of a light rod so that the separation between the centres is 50.0 cm. Find the moment of intertia of the system about an axis perpendicular to the rod passing through its middle point.

Discussion

43.	A wave represented by the given equation y = a cos ( kx - ω t ) is superposed with another wave to form a stationary wave such that the point x = 0 is a node. The equation for the other wave is AIIMS 1998; SCRA 1998; MP PET 2001; KCET 2001; AIEEE 2002; UPSEAT 2004]
Answer» A wave represented by the given equation y = a cos ( kx - $ω$ t ) is superposed with another wave to form a stationary wave such that the point x = 0 is a node. The equation for the other wave is AIIMS 1998; SCRA 1998; MP PET 2001; KCET 2001; AIEEE 2002; UPSEAT 2004]

43.

A wave represented by the given equation y = a cos ( kx - ω t ) is superposed with another wave to form a stationary wave such that the point x = 0 is a node. The equation for the other wave is AIIMS 1998; SCRA 1998; MP PET 2001; KCET 2001; AIEEE 2002; UPSEAT 2004]

Answer»

A wave represented by the given equation y = a cos ( kx - $ω$ t ) is superposed

with another wave to form a stationary wave such that the point x = 0 is a

node. The equation for the other wave is

AIIMS 1998; SCRA 1998; MP PET 2001; KCET 2001;

AIEEE 2002; UPSEAT 2004]

Discussion

44.	The upper portion of the circuit shown in the diagram is fixed while the springs of spring constant K=10 N/m and metal rod are hanging truly. The rod has a length of 5 cm and its mass can be neglected for the moment. What should be the value of the resistance R so that the springs elongate by 5 mm each, when current passes through the rod.(Give integer value)
Answer» The upper portion of the circuit shown in the diagram is fixed while the springs of spring constant $K = 10 N/m$ and metal rod are hanging truly. The rod has a length of $5 cm$ and its mass can be neglected for the moment. What should be the value of the resistance $R$ so that the springs elongate by $5 mm$ each, when current passes through the rod.(Give integer value)

Discussion

45.	A uniform rod of mass M and length L is at a dis†an ce d from point mass m. The gravitational force of attraction between them is? a. GMm/\lbrack(d+L/2)^2\rbrack b. GMm/\lbrack d(L+d)\rbrack c.GMm/\lbrack(d+L)^2\rbrack d. GMm/\lbrack L(L+d)\rbrack
Answer» A uniform rod of mass M and length L is at a dis†an ce d from point mass m. The gravitational force of attraction between them is? a. GMm/\lbrack(d+L/2)^2\rbrack b. GMm/\lbrack d(L+d)\rbrack c.GMm/\lbrack(d+L)^2\rbrack d. GMm/\lbrack L(L+d)\rbrack

Discussion

46.	A train moving with a constant speed of 25 m/scrosses a platform of length 100 m in 10 s. Thelength of train is
Answer» A train moving with a constant speed of 25 m/scrosses a platform of length 100 m in 10 s. Thelength of train is

Discussion

47.	What is the function ofcylindrical magnetic poles in a galvanometer? There are two similar galvanometers A and B. A is converted into a voltmeter and B is converted into a milli voltmeter. Which of them is connected with a higher series resistance? Justify.
Answer» What is the function ofcylindrical magnetic poles in a galvanometer? There are two similar galvanometers A and B. A is converted into a voltmeter and B is converted into a milli voltmeter. Which of them is connected with a higher series resistance? Justify.

Discussion

48.	Complétez avec les articles définis.
Answer» Complétez avec les articles définis.

Discussion

49.	A ball of mass mb=2 kg having initial velocity of vb=3 m/s hits a ballistic pendulum of mass ma=4 kg and stick to it. When the ball hits the pendulum it swings up from the equilibrium position and rises up as shown in figure. If length of the pendulum thread is l=0.1 m, find maximum deflection of thread with vertical(θ).
Answer» A ball of mass $m_{b} = 2 kg$ having initial velocity of $v_{b} = 3 m/s$ hits a ballistic pendulum of mass $m_{a} = 4 kg$ and stick to it. When the ball hits the pendulum it swings up from the equilibrium position and rises up as shown in figure. If length of the pendulum thread is $l = 0.1 m$ , find maximum deflection of thread with vertical $(θ)$ .

Discussion

50.	The field inside a uniform sphere is ___
Answer» The field inside a uniform sphere is ___

Discussion

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A body is thrown horizontally from the top of a tower of height 5 m. It touches the ground at a distance of 10 m from the foot of the tower. The initial velocity of the body is (g = 10 ms−2)

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In the above problem, if we consider the two masses to be a system, the tension is an external force.

Impedance Z as shown in the given figure is

If gravitational force can reach beyond the solar system then why it is the weakest among all fundamental force and what makes it weak?

2.Cp and Cv denote the molar specific heat capacities of a gas at constant pressure and constant volume respectively.Then

A moving coil galvanometer has a coil with 175 turns and area 1 cm2. It uses a torsion band of torsion constant 10−6 Nm rad−1. The coil is placed in a magnetic field B parallel to its plane. The coil deflects by 1∘ for a current of 1 mA. The value of B (in T) is approximately-

A circular coil of radius 2.5 cm carries current of 2 A. If the coil has 50 turns. Find the magnetic field at the center of the coil ?&lt;!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--&gt;&lt;!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--&gt;

A particle executes harmonic motion with an angular velocity and maximum acceleration of 3.5 rad/sec and 7.5 m/s2 respectively. The amplitude of oscillation is [AIIMS 1999; Pb. PET 1999]

what are conduction bands and valence bands ? how do they decide the resis†an ce offered by a materia

A man of 50 kg mass is standing in a gravity freespace at a height of 10 m above the floor. Hethrows a stone of 0.5 kg mass downwards with aspeed 2 m/s. When the stone reaches the floor,the distance of the man above the floor will be

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A source of sound S is moving with a velocity of 50 m/s towards a stationary observer. The observer measures the frequency of the source as 1000 Hz. What will be the apparent frequency of the source when it is moving away from the observer after crossing him? (Take velocity of sound in air 350 m/s)

A ball falls on an inclined plane of inclination θ=30∘ from a height h=10 m above the point of impact and makes a perfectly elastic collision. Find the distance where will it hit the plane again from the initial point of impact. (Take g=10 m/s2)

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how to convert more than ogive into less than ogive ?

What is the net charge on a conducting sphere of radius 10 cm? Given that the electric field from the center of sphere is equal to 3×10^3N/C and is directed inward

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Find the Requivalent.

Four massless springs whose force constants are 2k, 2k, k and 2k respectively are attached to a mass M kept on a frictionless plane (as shown in figure). If the mass M is displaced in the horizontal direction, then the frequency of the system is

Two identical spheres each of mass 1.20 kg and radius 10.0 cm are fixed at the ends of a light rod so that the separation between the centres is 50.0 cm. Find the moment of intertia of the system about an axis perpendicular to the rod passing through its middle point.

A wave represented by the given equation y = a cos ( kx - ω t ) is superposed with another wave to form a stationary wave such that the point x = 0 is a node. The equation for the other wave is AIIMS 1998; SCRA 1998; MP PET 2001; KCET 2001; AIEEE 2002; UPSEAT 2004]

A uniform rod of mass M and length L is at a dis†an ce d from point mass m. The gravitational force of attraction between them is? a. GMm/\lbrack(d+L/2)^2\rbrack b. GMm/\lbrack d(L+d)\rbrack c.GMm/\lbrack(d+L)^2\rbrack d. GMm/\lbrack L(L+d)\rbrack

A train moving with a constant speed of 25 m/scrosses a platform of length 100 m in 10 s. Thelength of train is

What is the function ofcylindrical magnetic poles in a galvanometer? There are two similar galvanometers A and B. A is converted into a voltmeter and B is converted into a milli voltmeter. Which of them is connected with a higher series resistance? Justify.

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The field inside a uniform sphere is ___

Integral x0 to x (dx) = integral 0 to t ( v dt ) = integral 0 to t ( v0 +at ) dt x-x0 =v0 t + 1/2 at2 . This is my confused part How we reached🔼 . Please explain

A circular coil of radius 2.5 cm carries current of 2 A. If the coil has 50 turns. Find the magnetic field at the center of the coil ?