50278 + Interview Questions in Physics

1.	A particle is thrown vertically upwards. If its velocity at half of the maximum height is 10ms, then maximum height attained by it is (Take g =10 ms2)
Answer» A particle is thrown vertically upwards. If its velocity at half of the maximum height is $10 \frac{m}{s}$ , then maximum height attained by it is (Take $g = 10 \frac{m}{s^{2}}$ )

Discussion

2.	A particle executes SHM, with an amplitude of 10 cm. When the particle is at 6 cm from the mean position, the magnitude of its velocity is equal to twice of its acceleration. Find the time period (in seconds)
Answer» A particle executes SHM, with an amplitude of $10 cm$ . When the particle is at $6 cm$ from the mean position, the magnitude of its velocity is equal to twice of its acceleration. Find the time period (in seconds)

Discussion

3.	A ball is thrown with a velocity whose horizontal component is 12 ms−1 from a point 15 m above the ground and 6 m away from a vertical wall 18.75 m high is such a way to just clear the wall. At what time(in s)will be ball reach the ground? (take g=10 ms−2)
Answer» A ball is thrown with a velocity whose horizontal component is $12 {ms}^{- 1}$ from a point $15 m$ above the ground and $6 m$ away from a vertical wall $18.75 m$ high is such a way to just clear the wall. At what time(in $s$ )will be ball reach the ground? (take $g = 10 {ms}^{- 2})$

Discussion

4.	Two vectors having equal magnitudes of A make an angle θ with each other. Find the magnitude B of the resultant vector and the angle it makes with any one of the vectors?
Answer» Two vectors having equal magnitudes of A make an angle θ with each other. Find the magnitude B of the resultant vector and the angle it makes with any one of the vectors?

Discussion

5.	A body of mass 1 kg moving in the x-direction suddenly explodes in two fragments of mass 1/8 kg and 7/8 kg . An instant later the smaller fragment is 0.14m above x-axis . The position of the heavier fragment is ?
Answer» A body of mass 1 kg moving in the x-direction suddenly explodes in two fragments of mass 1/8 kg and 7/8 kg . An instant later the smaller fragment is 0.14m above x-axis . The position of the heavier fragment is ?

Discussion

6.	Calculate the wave number of the wave.
Answer» Calculate the wave number of the wave.

Discussion

7.	When a body is placed in surroundings at a constant temperature of 20°C, and heated by a 10−W heater, its temperature remains constant at 40°C. If the temperature of the body is now raised from 20°C to 80°C in 5 minutes at a uniform rate, the total heat it will lose to the surroundings will be
Answer» When a body is placed in surroundings at a constant temperature of $20 ° C$ , and heated by a $10 - W$ heater, its temperature remains constant at $40 ° C$ . If the temperature of the body is now raised from $20 ° C$ to $80 ° C$ in $5$ minutes at a uniform rate, the total heat it will lose to the surroundings will be

Discussion

8.	An aluminium sphere of 20 cm diameter is heated from 0∘C to 100∘C. Its volume changes by (given that coefficient of linear expansion for aluminium αAl=23×10−6/∘C
Answer» An aluminium sphere of $20 cm$ diameter is heated from $0^{\circ} C$ to $100^{\circ} C$ . Its volume changes by (given that coefficient of linear expansion for aluminium $α_{A l} = 23 \times 10^{- 6} /^{\circ} C$

Discussion

9.	A mass M is suspended as shown in figure. If the system is in equilibrium and K is the spring constant, then the extension produced in the spring is given by (assume pulleys to be massless and strings inextensible.)
Answer» A mass $M$ is suspended as shown in figure. If the system is in equilibrium and $K$ is the spring constant, then the extension produced in the spring is given by (assume pulleys to be massless and strings inextensible.)

Discussion

10.	Sixty percent of given sample of oxygen gas when raised to a high temperature dissociates into atoms. Ratio of its initial heat capacity (at constant volume) to the final heat capacity (at constant volume) will be
Answer» Sixty percent of given sample of oxygen gas when raised to a high temperature dissociates into atoms. Ratio of its initial heat capacity (at constant volume) to the final heat capacity (at constant volume) will be

Discussion

11.	Two bullets are fired with horizontal velocity of 50 M per second 100 M per second from 2 Guns at a height of 19.6 m. a) will Bullet strike the ground. b) if yes then after how much time and which Bullet will strike first .c) what would be the part of the bullet?( g= 9.8 m/s2)
Answer» Two bullets are fired with horizontal velocity of 50 M per second 100 M per second from 2 Guns at a height of 19.6 m. a) will Bullet strike the ground. b) if yes then after how much time and which Bullet will strike first .c) what would be the part of the bullet?( g= 9.8 m/s^2₎

Discussion

12.	Slope of the curve y=x3−ex+cosx is
Answer» Slope of the curve $y = x^{3} - e^{x} + cos x$ is

Discussion

13.	Find the change in the internal energy of 2 kg of water as it is heated from 0∘C to 4∘C. The specific heat capacity of water is 4200 J kg−1 K−1 and its densities at 0∘C and 4∘C are 999.9 kg m−3 and 1000 kg m−3 respectively. Atmospheric pressure =105 Pa
Answer» Find the change in the internal energy of 2 kg of water as it is heated from $0^{\circ} C$ to $4^{\circ} C$ . The specific heat capacity of water is $4200 J {kg}^{- 1} K^{- 1}$ and its densities at $0^{\circ} C$ and $4^{\circ} C$ are 999.9 kg $m^{- 3}$ and 1000 kg $m^{- 3}$ respectively. Atmospheric pressure $= 10^{5} Pa$

Discussion

14.	An ideal gas is taken through a quasi-static process described by P=αV2, with α=5.00 atm/m6. The gas is expanded to twice its original volume of 1.00 m3. How much work is done by the gas (in MJ) during expansion in this process?
Answer» An ideal gas is taken through a quasi-static process described by $P = α V^{2}$ , with $α = 5.00 {atm/m}^{6}$ . The gas is expanded to twice its original volume of $1.00 m^{3}$ . How much work is done by the gas (in $MJ$ ) during expansion in this process?

Discussion

15.	Figure (42-E2) is the plot of the stopping potential versus the frequency of the light used in an experiment on photoelectric effect. Find (a) the ratio h/e and (b) the work function.
Answer» Figure (42-E2) is the plot of the stopping potential versus the frequency of the light used in an experiment on photoelectric effect. Find (a) the ratio h/e and (b) the work function.

15.

Figure (42-E2) is the plot of the stopping potential versus the frequency of the light used in an experiment on photoelectric effect. Find (a) the ratio h/e and (b) the work function.

Answer»

Figure (42-E2) is the plot of the stopping potential versus the frequency of the light used in an experiment on photoelectric effect. Find (a) the ratio h/e and (b) the work function.

Discussion

16.	How BCl3, SiCl4, PCl3 have covalently bonded molecules
Answer» How BCl3, SiCl4, PCl3 have covalently bonded molecules

Discussion

17.	A car is moving with constant speed on a road as shown in figure. The normal reaction by the road on the car is NA,NB and NC when it is at the points A, B and C respectively. Then:
Answer» A car is moving with constant speed on a road as shown in figure. The normal reaction by the road on the car is $N_{A}, N_{B}$ and $N_{C}$ when it is at the points A, B and C respectively. Then:

Discussion

18.	Find the position of point P in a rectangular co-ordinate system of (1,0.5,2).
Answer» Find the position of point $P$ in a rectangular co-ordinate system of $(1, 0.5, 2)$ .

Discussion

19.	Why does a red rose when seen in green light appear black ?
Answer» Why does a red rose when seen in green light appear black ?

Discussion

20.	freely suspendednorth pole of magnet shoes which magnetic pole of earth and it shows which gemotric pole of earth? Please explain in detail with doagram
Answer» freely suspendednorth pole of magnet shoes which magnetic pole of earth and it shows which gemotric pole of earth? Please explain in detail with doagram

Discussion

21.	If a sample of metal weighs 210 gm in air, 180 gm in water and 120 gm in a liquid:
Answer» If a sample of metal weighs 210 gm in air, 180 gm in water and 120 gm in a liquid:

Discussion

22.	What is impuse?
Answer» What is impuse?

Discussion

23.	If 'R' is the radius of gyration of a body of mass 'M' and radius 'r' then the ratio of its rotational to translational kinetic energy in the rolling condition is.
Answer» If 'R' is the radius of gyration of a body of mass 'M' and radius 'r' then the ratio of its rotational to translational kinetic energy in the rolling condition is.

Discussion

24.	The initial velocity of the particle is 10 m/s and its retardation is 2 m/s2. The distance moved by the particle in 5th second of its motion is
Answer» The initial velocity of the particle is $10 m/s$ and its retardation is $2 {m/s}^{2}$ . The distance moved by the particle in $5^{t h}$ second of its motion is

Discussion

25.	An object starts from rest with constant acceleration of 4 m/s^2 find the distance travelled by that object in 5th half second
Answer» An object starts from rest with constant acceleration of 4 m/s^2 find the distance travelled by that object in 5th half second

Discussion

26.	Two particles A and B of equal mass are located at some distance from each other. Particle A is at rest while B moves away from A at speed v. What happens to the center of mass of the two particles?
Answer» Two particles A and B of equal mass are located at some distance from each other. Particle A is at rest while B moves away from A at speed v. What happens to the center of mass of the two particles?

Discussion

27.	The position vector of a particle is →r=(a cos ωt)^i+(a sin ωt)^j. The velocity of the particle is
Answer» The position vector of a particle is $\to r = (a c o s ω t)^i + (a s i n ω t)^j$ . The velocity of the particle is

Discussion

28.	What is CV and cp
Answer» What is CV and cp

Discussion

29.	A gas absorbs a photon of 300 nm and then re-emits two photons to come back to its original state. One photon has a wavelength 900 nm. The wavelength in nm of second photon is:
Answer» A gas absorbs a photon of $300 n m$ and then re-emits two photons to come back to its original state. One photon has a wavelength $900 n m .$ The wavelength in nm of second photon is:

Discussion

30.	With respect to a rectangular cartesian coordinate system, three vectors are expressed as →a=4^i−^j,→b=−3^i+2^j and →c=−^k where ^i,^j,^k are unit vectors, along the X, Y and Z-axis respectively. The unit vectors ^ralong the direction of sum of these vector is
Answer» With respect to a rectangular cartesian coordinate system, three vectors are expressed as $\to a = 4^i -^j, \to b = - 3^i + 2^j$ and $\to c = -^k$ where $^i,^j,^k$ are unit vectors, along the X, Y and Z-axis respectively. The unit vectors $^r$ along the direction of sum of these vector is

Discussion

31.	A long cylindrical volume contains a uniformly distributed charge of density ρ. Find the electric field at a point P inside the cylindrical volume at a distance x from its axis (figure 30-E5)
Answer» A long cylindrical volume contains a uniformly distributed charge of density $ρ$ . Find the electric field at a point P inside the cylindrical volume at a distance x from its axis (figure 30-E5)

31.

A long cylindrical volume contains a uniformly distributed charge of density ρ. Find the electric field at a point P inside the cylindrical volume at a distance x from its axis (figure 30-E5)

Answer»

A long cylindrical volume contains a uniformly distributed charge of density $ρ$ . Find the electric field at a point P inside the cylindrical volume at a distance x from its axis (figure 30-E5)

Discussion

32.	The surface tension of soap solution is 25×10−3Nm−1. The excess pressure inside a soap bubble of diameter 1 cm is
Answer» The surface tension of soap solution is $25 \times 10^{- 3} N m^{- 1}$ . The excess pressure inside a soap bubble of diameter 1 cm is

Discussion

33.	A wire of length L and radius r is rigidly fixed at one end. On stretching the other end of the wire with a force F, the increase in its length is l. If another wire of same material but of length 2L and radius 2r is stretched with a force of 2F, the increase in its length will be
Answer» A wire of length L and radius r is rigidly fixed at one end. On stretching the other end of the wire with a force F, the increase in its length is l. If another wire of same material but of length 2L and radius 2r is stretched with a force of 2F, the increase in its length will be

Discussion

34.	A block of mass 5 kg is at rest on the rough inclined surface. If the angle of inclination of the plane is 60 degree then force applied by it on the block is
Answer» A block of mass 5 kg is at rest on the rough inclined surface. If the angle of inclination of the plane is 60 degree then force applied by it on the block is

Discussion

35.	The ratio of the wavelengths of the longest wavelength lines in the Lyman and Balmer series of hydrogen spectrum is
Answer» The ratio of the wavelengths of the longest wavelength lines in the Lyman and Balmer series of hydrogen spectrum is

Discussion

36.	Who created the field of magnetism (the basic laws)was it based on experimental data or on mathematical proof.
Answer» Who created the field of magnetism (the basic laws)was it based on experimental data or on mathematical proof.

Discussion

37.	A small steel ball of radius r is allowed to fall under gravity through a column of a viscous liquid of coefficient of viscosity η . After some time the velocity of the ball attains a constant value known as terminal velocity vr. The terminal velocity depends on (i) the mass of the ball m, (ii) η, (iii) r and (iv) acceleration due to gravity g . Which of the following relations is dimensionally correct
Answer» A small steel ball of radius $r$ is allowed to fall under gravity through a column of a viscous liquid of coefficient of viscosity $η$ . After some time the velocity of the ball attains a constant value known as terminal velocity $v_{r}$ . The terminal velocity depends on $(i)$ the mass of the ball $m, (i i) η, (i i i) r a n d (i v)$ acceleration due to gravity $g$ . Which of the following relations is dimensionally correct

Discussion

38.	What is the force between two small charges of 2×10−7C and 3×10−7C placed 30 cm apart in air?
Answer» What is the force between two small charges of $2 \times 10^{- 7} C$ and $3 \times 10^{- 7} C$ placed 30 cm apart in air?

Discussion

39.	A circular coil of N turns is wound around the central plane of a solid sphere which rests on an inclined plane of angle θ. Find the strength of the vertical magnetic B such that the sphere is in equilibrium.
Answer» A circular coil of N turns is wound around the central plane of a solid sphere which rests on an inclined plane of angle $θ$ . Find the strength of the vertical magnetic B such that the sphere is in equilibrium.

Discussion

40.	The shortest distance between the lines x+12=y+13=z+14;x+13=y4=z5 is
Answer» The shortest distance between the lines $\frac{x + 1}{2} = \frac{y + 1}{3} = \frac{z + 1}{4}; \frac{x + 1}{3} = \frac{y}{4} = \frac{z}{5}$ is

Discussion

41.	Consider a system of a small body of mass m kept on a large body of mass M placed over an inclined plane of angle of inclination θ to the horizontal. Find the acceleration of m when the system is set in motion. Assume inclined plane to be fixed. All the contact surfaces are smooth.
Answer» Consider a system of a small body of mass m kept on a large body of mass M placed over an inclined plane of angle of inclination θ to the horizontal. Find the acceleration of m when the system is set in motion. Assume inclined plane to be fixed. All the contact surfaces are smooth.

41.

Consider a system of a small body of mass m kept on a large body of mass M placed over an inclined plane of angle of inclination θ to the horizontal. Find the acceleration of m when the system is set in motion. Assume inclined plane to be fixed. All the contact surfaces are smooth.

Answer»

Consider a system of a small body of mass m kept on a large body of mass M placed over an inclined plane of angle of inclination θ to the horizontal. Find the acceleration of m when the system is set in motion. Assume inclined plane to be fixed. All the contact surfaces are smooth.

Discussion

42.	Find out ω of the particle A w.r.t particle B at the instant given in the figure.
Answer» Find out $ω$ of the particle $A$ w.r.t particle $B$ at the instant given in the figure.

Discussion

43.	Two springs of spring constants 1500 N/m and 3000 N/m respectively are stretched with the same force. The ratio of potential energies will be
Answer» Two springs of spring constants 1500 N/m and 3000 N/m respectively are stretched with the same force. The ratio of potential energies will be

43.

Two springs of spring constants 1500 N/m and 3000 N/m respectively are stretched with the same force. The ratio of potential energies will be

Answer»

Two springs of spring constants 1500 N/m and 3000 N/m respectively are stretched with the same force. The ratio of potential energies will be

Discussion

44.	In the figure shown, the mass of the plank is m and that of the solid cylinder is 8 m. Springs are light. The plank is slightly displaced from equilibrium and then released. There is no slipping at any contact point. The ratio of mass of the plank and stiffness of the spring i.e. mk=2π2 . The period of small oscillations of the plank (in seconds) is
Answer» In the figure shown, the mass of the plank is m and that of the solid cylinder is $8 m$ . Springs are light. The plank is slightly displaced from equilibrium and then released. There is no slipping at any contact point. The ratio of mass of the plank and stiffness of the spring i.e. $\frac{m}{k} = \frac{2}{π^{2}}$ . The period of small oscillations of the plank (in seconds) is

Discussion

45.	Two identical metallic spheres, having unequal opposite charges are placed at a distance of 0.90 m apart. After bringing them in contact with each other, they again placed at the same distance apart. Now the force of repulsion between them is 0.025 N. Calculate the final charge on each of them.
Answer» Two identical metallic spheres, having unequal opposite charges are placed at a distance of 0.90 m apart. After bringing them in contact with each other, they again placed at the same distance apart. Now the force of repulsion between them is 0.025 N. Calculate the final charge on each of them.

Discussion

46.	Identify the correct statement from the following?
Answer» Identify the correct statement from the following?

46.

Identify the correct statement from the following?

Answer»

Identify the correct statement from the following?

Discussion

47.	One mole of Gas in a 10 litre vessel exerts a pressure of 185.6 cm of Hg at 25∘C. Calculate the value of ‘a’. Given R = .0821 litre/degree mole and b = 0.0391 litre/mole.
Answer» One mole of Gas in a 10 litre vessel exerts a pressure of 185.6 cm of Hg at $25^{\circ}$ C. Calculate the value of ‘a’. Given R = .0821 litre/degree mole and b = 0.0391 litre/mole.

Discussion

48.	A body of mass 2 kg is hung on a spring balance mounted vertically in a lift. If the lift descends with an acceleration equal to the acceleration due to gravity 'g', the reading on the spring balance will be
Answer» A body of mass 2 kg is hung on a spring balance mounted vertically in a lift. If the lift descends with an acceleration equal to the acceleration due to gravity 'g', the reading on the spring balance will be

Discussion

49.	Jayagovindan was pulling a trolley of mass 375 kg containing a sand bag of 34 kg. As he was moving uniformly with a speed of 28 kmph on a frictionless track, the sand in the bag started leaking at the rate of 0.06 kg/s. What would be the speed of the trolley when the entire sand bag gets empty?
Answer» Jayagovindan was pulling a trolley of mass 375 kg containing a sand bag of 34 kg. As he was moving uniformly with a speed of 28 kmph on a frictionless track, the sand in the bag started leaking at the rate of 0.06 kg/s. What would be the speed of the trolley when the entire sand bag gets empty?

Discussion

50.	A stiff metal rod of mass 13 kg is kept over two knife edges of length L=1 m with a gap of d=10 cm between them as shown in the figure. The rod carries a current of 16 A (in the direction shown) and rolls along the rails without slipping due to the magnetic force produced by a uniform magnetic field of 0.5 T perpendicular and pointing downwards. If the rod starts from rest and its speed when it leaves the rails is k√5 ms−1, then the value of k (integer) is
Answer» A stiff metal rod of mass $\frac{1}{3} k g$ is kept over two knife edges of length $L = 1 m$ with a gap of $d = 10 c m$ between them as shown in the figure. The rod carries a current of $16 A$ (in the direction shown) and rolls along the rails without slipping due to the magnetic force produced by a uniform magnetic field of $0.5 T$ perpendicular and pointing downwards. If the rod starts from rest and its speed when it leaves the rails is $\frac{k}{\sqrt{5}} m s^{- 1}$ , then the value of k (integer) is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A particle is thrown vertically upwards. If its velocity at half of the maximum height is 10ms, then maximum height attained by it is (Take g =10 ms2)

A particle executes SHM, with an amplitude of 10 cm. When the particle is at 6 cm from the mean position, the magnitude of its velocity is equal to twice of its acceleration. Find the time period (in seconds)

A ball is thrown with a velocity whose horizontal component is 12 ms−1 from a point 15 m above the ground and 6 m away from a vertical wall 18.75 m high is such a way to just clear the wall. At what time(in s)will be ball reach the ground? (take g=10 ms−2)

Two vectors having equal magnitudes of A make an angle θ with each other. Find the magnitude B of the resultant vector and the angle it makes with any one of the vectors?

A body of mass 1 kg moving in the x-direction suddenly explodes in two fragments of mass 1/8 kg and 7/8 kg . An instant later the smaller fragment is 0.14m above x-axis . The position of the heavier fragment is ?

Calculate the wave number of the wave.

An aluminium sphere of 20 cm diameter is heated from 0∘C to 100∘C. Its volume changes by (given that coefficient of linear expansion for aluminium αAl=23×10−6/∘C

A mass M is suspended as shown in figure. If the system is in equilibrium and K is the spring constant, then the extension produced in the spring is given by (assume pulleys to be massless and strings inextensible.)

Sixty percent of given sample of oxygen gas when raised to a high temperature dissociates into atoms. Ratio of its initial heat capacity (at constant volume) to the final heat capacity (at constant volume) will be

Two bullets are fired with horizontal velocity of 50 M per second 100 M per second from 2 Guns at a height of 19.6 m. a) will Bullet strike the ground. b) if yes then after how much time and which Bullet will strike first .c) what would be the part of the bullet?( g= 9.8 m/s2)

Slope of the curve y=x3−ex+cosx is

Find the change in the internal energy of 2 kg of water as it is heated from 0∘C to 4∘C. The specific heat capacity of water is 4200 J kg−1 K−1 and its densities at 0∘C and 4∘C are 999.9 kg m−3 and 1000 kg m−3 respectively. Atmospheric pressure =105 Pa

An ideal gas is taken through a quasi-static process described by P=αV2, with α=5.00 atm/m6. The gas is expanded to twice its original volume of 1.00 m3. How much work is done by the gas (in MJ) during expansion in this process?

Figure (42-E2) is the plot of the stopping potential versus the frequency of the light used in an experiment on photoelectric effect. Find (a) the ratio h/e and (b) the work function.

How BCl3, SiCl4, PCl3 have covalently bonded molecules

A car is moving with constant speed on a road as shown in figure. The normal reaction by the road on the car is NA,NB and NC when it is at the points A, B and C respectively. Then:

Find the position of point P in a rectangular co-ordinate system of (1,0.5,2).

Why does a red rose when seen in green light appear black ?

freely suspendednorth pole of magnet shoes which magnetic pole of earth and it shows which gemotric pole of earth? Please explain in detail with doagram

If a sample of metal weighs 210 gm in air, 180 gm in water and 120 gm in a liquid:

What is impuse?

If 'R' is the radius of gyration of a body of mass 'M' and radius 'r' then the ratio of its rotational to translational kinetic energy in the rolling condition is.

The initial velocity of the particle is 10 m/s and its retardation is 2 m/s2. The distance moved by the particle in 5th second of its motion is

An object starts from rest with constant acceleration of 4 m/s^2 find the distance travelled by that object in 5th half second

Two particles A and B of equal mass are located at some distance from each other. Particle A is at rest while B moves away from A at speed v. What happens to the center of mass of the two particles?

The position vector of a particle is →r=(a cos ωt)^i+(a sin ωt)^j. The velocity of the particle is

What is CV and cp

A gas absorbs a photon of 300 nm and then re-emits two photons to come back to its original state. One photon has a wavelength 900 nm. The wavelength in nm of second photon is:

With respect to a rectangular cartesian coordinate system, three vectors are expressed as →a=4^i−^j,→b=−3^i+2^j and →c=−^k where ^i,^j,^k are unit vectors, along the X, Y and Z-axis respectively. The unit vectors ^ralong the direction of sum of these vector is

A long cylindrical volume contains a uniformly distributed charge of density ρ. Find the electric field at a point P inside the cylindrical volume at a distance x from its axis (figure 30-E5)

The surface tension of soap solution is 25×10−3Nm−1. The excess pressure inside a soap bubble of diameter 1 cm is

A wire of length L and radius r is rigidly fixed at one end. On stretching the other end of the wire with a force F, the increase in its length is l. If another wire of same material but of length 2L and radius 2r is stretched with a force of 2F, the increase in its length will be

A block of mass 5 kg is at rest on the rough inclined surface. If the angle of inclination of the plane is 60 degree then force applied by it on the block is

The ratio of the wavelengths of the longest wavelength lines in the Lyman and Balmer series of hydrogen spectrum is

Who created the field of magnetism (the basic laws)was it based on experimental data or on mathematical proof.

What is the force between two small charges of 2×10−7C and 3×10−7C placed 30 cm apart in air?

A circular coil of N turns is wound around the central plane of a solid sphere which rests on an inclined plane of angle θ. Find the strength of the vertical magnetic B such that the sphere is in equilibrium.

The shortest distance between the lines x+12=y+13=z+14;x+13=y4=z5 is

Consider a system of a small body of mass m kept on a large body of mass M placed over an inclined plane of angle of inclination θ to the horizontal. Find the acceleration of m when the system is set in motion. Assume inclined plane to be fixed. All the contact surfaces are smooth.

Find out ω of the particle A w.r.t particle B at the instant given in the figure.

Two springs of spring constants 1500 N/m and 3000 N/m respectively are stretched with the same force. The ratio of potential energies will be

Two identical metallic spheres, having unequal opposite charges are placed at a distance of 0.90 m apart. After bringing them in contact with each other, they again placed at the same distance apart. Now the force of repulsion between them is 0.025 N. Calculate the final charge on each of them.

Identify the correct statement from the following?

One mole of Gas in a 10 litre vessel exerts a pressure of 185.6 cm of Hg at 25∘C. Calculate the value of ‘a’. Given R = .0821 litre/degree mole and b = 0.0391 litre/mole.

A body of mass 2 kg is hung on a spring balance mounted vertically in a lift. If the lift descends with an acceleration equal to the acceleration due to gravity 'g', the reading on the spring balance will be

Jayagovindan was pulling a trolley of mass 375 kg containing a sand bag of 34 kg. As he was moving uniformly with a speed of 28 kmph on a frictionless track, the sand in the bag started leaking at the rate of 0.06 kg/s. What would be the speed of the trolley when the entire sand bag gets empty?