13232 + Interview Questions in Physics Page 76 InterviewSolution

3751.	A dam has broader walls at the bottom than at the top. Explain.
Answer» A dam has broader walls at the bottom than at the top. Explain.

Discussion

3752.	Brakes are applied to a moving track to produce retordation if 5 meter/ second square If the time taken between application of brakes in a truck to stop is 2 second caluclate the distance travelled by the truck during this time
Answer» Brakes are applied to a moving track to produce retordation if 5 meter/ second square If the time taken between application of brakes in a truck to stop is 2 second caluclate the distance travelled by the truck during this time

Discussion

3753.	Question 70(v)A man started his journey on his car from Location A and came back. The given graph shows his position at different times during the whole journey.At what time did he have the fastest speed?
Answer» Question 70(v) A man started his journey on his car from Location A and came back. The given graph shows his position at different times during the whole journey. At what time did he have the fastest speed?

Discussion

3754.	Question 6Which one of the following forces is a contact force?(a) force of gravity(b) force of friction(c) magnetic force(d) electrostatic force
Answer» Question 6 Which one of the following forces is a contact force? (a) force of gravity (b) force of friction (c) magnetic force (d) electrostatic force

Discussion

3755.	Match the following quantities with their corresponding representations of units.
Answer» Match the following quantities with their corresponding representations of units.

Discussion

3756.	When a copper ball is heated, the largest percentage increase will occur in its:
Answer» When a copper ball is heated, the largest percentage increase will occur in its:

Discussion

3757.	An imaginary radioactive element decays to form elements X1,X2,X3,X4,X5 and X6, by ejecting two β-particles, followed by an α-particle, and again two (β-particles followed by an α -particle. What are the mass number and the atomic number of X6?
Answer» An imaginary radioactive element decays to form elements $X_{1}, X_{2}, X_{3}, X_{4}, X_{5} a n d X_{6}$ , by ejecting two $β$ -particles, followed by an $α$ -particle, and again two ( $β$ -particles followed by an $α$ -particle. What are the mass number and the atomic number of $X_{6}$ ?

Discussion

3758.	The radius of Earth is about 6400 km and that of Mars is 3200 km. The mass of the Earth is about 10 times the mass of Mars. If an object weighs 200 N on the surface of Earth, its weight on the surface of Mars will be
Answer» The radius of Earth is about $6400 km$ and that of Mars is $3200 km$ . The mass of the Earth is about $10$ times the mass of Mars. If an object weighs $200 N$ on the surface of Earth, its weight on the surface of Mars will be

Discussion

3759.	a body is moving with a velocity of 15m/s and it comes to rest in 20m/s, what was the acceleration
Answer» a body is moving with a velocity of 15m/s and it comes to rest in 20m/s, what was the acceleration

Discussion

3760.	The average velocity of a particle moving in a straight line, with constant acceleration ‘a’ and initial velocity u in first t seconds is:
Answer» The average velocity of a particle moving in a straight line, with constant acceleration ‘a’ and initial velocity u in first t seconds is:

Discussion

3761.	10 kg ball is dropped from a height of 10 m. What is the speed of the ball just before it reaches the ground?
Answer» 10 kg ball is dropped from a height of 10 m. What is the speed of the ball just before it reaches the ground?

Discussion

3762.	37.A man is running with 100 m/s velocity eastwards on a straight road. Rain appears to him, falling at an angle of 37^° east of vertical downward. Now the man doubles his speed. Then the rain appears to him to fall at 53^° with vertical. Find velocity of the rain.
Answer» 37.A man is running with 100 m/s velocity eastwards on a straight road. Rain appears to him, falling at an angle of 37^° east of vertical downward. Now the man doubles his speed. Then the rain appears to him to fall at 53^° with vertical. Find velocity of the rain.

Discussion

3763.	If acceleration depends on time such that a= 4-2t, where a and t are in SI units, then change in velocity during time interval t=0 s to t=2 s, is
Answer» If acceleration depends on time such that a= 4-2t, where a and t are in SI units, then change in velocity during time interval t=0 s to t=2 s, is

Discussion

3764.	An object has moved through a distance.can it have zero displacement ? If yes, support your answer with an example.
Answer» An object has moved through a distance.can it have zero displacement ? If yes, support your answer with an example.

Discussion

3765.	Question 30What do you understand by fuel efficiency?
Answer» Question 30 What do you understand by fuel efficiency?

Discussion

3766.	In the h-parameter model of the 2-port network given in the figure shown, the value of h22 (in S) is1.25
Answer» In the h-parameter model of the 2-port network given in the figure shown, the value of $h_{22}$ (in S) is 1.25

3766.

In the h-parameter model of the 2-port network given in the figure shown, the value of h22 (in S) is1.25

Answer»

In the h-parameter model of the 2-port network given in the figure shown, the value of $h_{22}$ (in S) is

1.25

Discussion

3767.	A coin is gently dropped from a height of 20 m. If its velocity increases uniformly at the rate of 10m/s2, with what velocity and after what time will it strike the ground?
Answer» A coin is gently dropped from a height of 20 m. If its velocity increases uniformly at the rate of 10 $m / s^{2}$ , with what velocity and after what time will it strike the ground?

Discussion

3768.	The potential energy of a body of mass 2kg is given as U=3x+4y.The magnitude of accelerationif the body is?
Answer» The potential energy of a body of mass 2kg is given as U=3x+4y.The magnitude of accelerationif the body is?

Discussion

3769.	A positive charge +Q is fixed at a point A. Another positively charged particle of mass m and charge +q is projected from a point B with velocity u as shown in the figure. The point B is at large distance from A and at distance ‘d’ from the line AC. The initial velocity is parallel to the line AC. The point C is at very large distance from A. Find the minimum distance (in meter) of +q from +Q during the motion. Take Qq=4π∈0mu2d and d=(√2−1) meter.
Answer» A positive charge +Q is fixed at a point A. Another positively charged particle of mass m and charge +q is projected from a point B with velocity u as shown in the figure. The point B is at large distance from A and at distance ‘d’ from the line AC. The initial velocity is parallel to the line AC. The point C is at very large distance from A. Find the minimum distance (in meter) of +q from +Q during the motion. Take $Q q = 4 π \in_{0} m u^{2} d$ and $d = (\sqrt{2} - 1)$ meter.

Discussion

3770.	A POINT B LIES ON THE PERPENDICULAR BISECTOR.OF AN ELECTRIC DIPOLE OF DIPOLE MOMENT p THE DISTANCE OF B FROM THE DIPOLE IS r(r is much larger thn the size of the dipole) THE ELECTRICAL INTENSITY AT B IS PROPORTIONAL TO?
Answer» A POINT B LIES ON THE PERPENDICULAR BISECTOR.OF AN ELECTRIC DIPOLE OF DIPOLE MOMENT p THE DISTANCE OF B FROM THE DIPOLE IS r(r is much larger thn the size of the dipole) THE ELECTRICAL INTENSITY AT B IS PROPORTIONAL TO?

Discussion

3771.	Duke never jumped on Chuck again because _____________. (i) Duke was paralysed and unable to jump (ii) Chuck was angry with Duke for jumping at him (iii) Duke realized that Chuck was not well and could not balance himself (iv) Marcy did not allow Duke to come near Chuck
Answer» Duke never jumped on Chuck again because _____________. (i) Duke was paralysed and unable to jump (ii) Chuck was angry with Duke for jumping at him (iii) Duke realized that Chuck was not well and could not balance himself (iv) Marcy did not allow Duke to come near Chuck

3771.

Duke never jumped on Chuck again because _____________. (i) Duke was paralysed and unable to jump (ii) Chuck was angry with Duke for jumping at him (iii) Duke realized that Chuck was not well and could not balance himself (iv) Marcy did not allow Duke to come near Chuck

Answer»

Duke
never jumped on Chuck again because _____________.

(i)
Duke was paralysed and unable to jump

(ii)
Chuck was angry with Duke for jumping at him

(iii)
Duke realized that Chuck was not well and could not balance himself

(iv)
Marcy did not allow Duke to come near Chuck

Discussion

3772.	A 0.3i- 0.4j+ ck . Calculate the value of c if A is a vector.Given
Answer» A 0.3i- 0.4j+ ck . Calculate the value of c if A is a vector.Given

Discussion

3773.	A block is hanging by a string. What will be the tension in the string given the mass of the block is m?
Answer» A block is hanging by a string. What will be the tension in the string given the mass of the block is m?

Discussion

3774.	47.when the incident ray are not parallax then which of the following parameter for the spherical mirror will be different from when the incident ray parallax. 1. Pole 2. Focus 3. Radius of curvature 4. Principal axis
Answer» 47.when the incident ray are not parallax then which of the following parameter for the spherical mirror will be different from when the incident ray parallax. 1. Pole 2. Focus 3. Radius of curvature 4. Principal axis

Discussion

3775.	When a car runs on a circular track with a uniform speed, its velocity is said to be changing. This is because : (a) the car has a uniform acceleration (b) the direction of car varies continuously (c) the car travels unequal distances in equal time intervals (d) the car travels equal distances in unequal time intervals
Answer» When a car runs on a circular track with a uniform speed, its velocity is said to be changing. This is because : (a) the car has a uniform acceleration (b) the direction of car varies continuously (c) the car travels unequal distances in equal time intervals (d) the car travels equal distances in unequal time intervals

3775.

When a car runs on a circular track with a uniform speed, its velocity is said to be changing. This is because : (a) the car has a uniform acceleration (b) the direction of car varies continuously (c) the car travels unequal distances in equal time intervals (d) the car travels equal distances in unequal time intervals

Answer»

When a car runs on a circular track with a uniform speed, its velocity is said to be changing. This is because :

(a) the car has a uniform acceleration

(b) the direction of car varies continuously

(c) the car travels unequal distances in equal time intervals

(d) the car travels equal distances in unequal time intervals

Discussion

3776.	Find the electric current that flows through a conductor if a charge of 0.8 C flows through it in 4 seconds.
Answer» Find the electric current that flows through a conductor if a charge of $0.8 C$ flows through it in $4 s e c o n d s$ .

Discussion

3777.	Acceleration of a body is given by a = 2t+3t^2 ms^-2.Calculate its velocity. Given that its initial velocity is 5m/s.
Answer» Acceleration of a body is given by a = 2t+3t^2 ms^-2.Calculate its velocity. Given that its initial velocity is 5m/s.

Discussion

3778.	44.if the mass of one object is doubled and the mass of the other remains the same and if the distance between them is halved, then how does the gravitational force change.(hint :try using the Newton's law of gravitation)
Answer» 44.if the mass of one object is doubled and the mass of the other remains the same and if the distance between them is halved, then how does the gravitational force change.(hint :try using the Newton's law of gravitation)

Discussion

3779.	A washing machine rated 300 W is operated one and half hour/day. If the cost of unit of power is Rs.3.50, find the cost of operating a washing machine for the month of september
Answer» A washing machine rated 300 W is operated one and half hour/day. If the cost of unit of power is $R s . 3.50,$ find the cost of operating a washing machine for the month of september

Discussion

3780.	An object experiences a net zero external unbalanced force .Is it possible for the object to be travelling with a non zero velocity?
Answer» An object experiences a net zero external unbalanced force .Is it possible for the object to be travelling with a non zero velocity?

3780.

An object experiences a net zero external unbalanced force .Is it possible for the object to be travelling with a non zero velocity?

Answer»

An object experiences a net zero external

unbalanced force .Is it possible for the object to be travelling with a non zero velocity?

Discussion

3781.	An object has velocity v= 20i+30j m/s at t=0s. It undergoes a constant acceleration a=-10j . then time t at which v(t) is perpendicular to 'a' is
Answer» An object has velocity v= 20i+30j m/s at t=0s. It undergoes a constant acceleration a=-10j . then time t at which v(t) is perpendicular to 'a' is

Discussion

3782.	Two bodies of masses 3 kg and 12 kg are placed at a distance of 12 m. The third body of mass 0.5 kg is to be placed at such a point that the force acting on this body is zero. Find the position of that point.
Answer» Two bodies of masses 3 kg and 12 kg are placed at a distance of 12 m. The third body of mass 0.5 kg is to be placed at such a point that the force acting on this body is zero. Find the position of that point.

Discussion

3783.	The speed of light in water and glass is v1 and v2, respectively. The refractive index wng of the glass with respect to the water is .
Answer» The speed of light in water and glass is $v_{1} and v_{2}$ , respectively. The refractive index $_{w} n_{g}$ of the glass with respect to the water is .

Discussion

3784.	Give reason for the following: In most of the cases, we cannot see the vibrations of a sound producing object with our eyes.
Answer» Give reason for the following: In most of the cases, we cannot see the vibrations of a sound producing object with our eyes.

3784.

Give reason for the following: In most of the cases, we cannot see the vibrations of a sound producing object with our eyes.

Answer»

Give reason for the following:

In most of the cases, we cannot see the vibrations of a sound producing object with our eyes.

Discussion

3785.	What is lateral displacement
Answer» What is lateral displacement

Discussion

3786.	निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए − तीसरे दिन सुबह अतिथि ने क्या कहा?
Answer» निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए − तीसरे दिन सुबह अतिथि ने क्या कहा?

3786.

निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए − तीसरे दिन सुबह अतिथि ने क्या कहा?

Answer»

निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए −

तीसरे दिन सुबह अतिथि ने क्या कहा?

Discussion

3787.	The plot of the variation of potential difference across a combination of three identical cells in series, versus current is shown below. What is the emf and internal resistance of each cell ?
Answer» The plot of the variation of potential difference across a combination of three identical cells in series, versus current is shown below. What is the emf and internal resistance of each cell ?

Discussion

3788.	the value of acceleration due to gravity will be 1% of its value at the surface of earth at a height of(take Re=6400km)
Answer» the value of acceleration due to gravity will be 1% of its value at the surface of earth at a height of(take Re=6400km)

Discussion

3789.	bullets of.03kgmass each hit a plate at the rate of 200 bullets per sec with velocity30m/s.the average force acting on plate in newton is
Answer» bullets of.03kgmass each hit a plate at the rate of 200 bullets per sec with velocity30m/s.the average force acting on plate in newton is

Discussion

3790.	n object of mass 3kg is moving eastwards with velocity 1 m/s and another object of mass 2 kg is moving northwards with velocity 2 m/s. Find the velocity of centre of mass.
Answer» n object of mass 3kg is moving eastwards with velocity 1 m/s and another object of mass 2 kg is moving northwards with velocity 2 m/s. Find the velocity of centre of mass.

Discussion

3791.	Two rods of length l1 and l2 are made of materials whose coefficient of linear expansion are α1 and α2. If difference between two lengths is independent of temperature then
Answer» Two rods of length $l_{1}$ and $l_{2}$ are made of materials whose coefficient of linear expansion are $α_{1}$ and $α_{2}$ . If difference between two lengths is independent of temperature then

Discussion

3792.	a packet of weight W is dropped with the help of a parachute and on striking the ground comes to rest with a retardation equal to twice the acceleration due to gravity. what is the force exerted on the ground? W 2W 3W 4W
Answer» a packet of weight W is dropped with the help of a parachute and on striking the ground comes to rest with a retardation equal to twice the acceleration due to gravity. what is the force exerted on the ground? W 2W 3W 4W

Discussion

3793.	S.I. unit of heat is:
Answer» S.I. unit of heat is:

Discussion

3794.	A ball is released from the top of a tower of height h meters. It takes T seconds to reach the ground. What is the position of the ball in T/3 second
Answer» A ball is released from the top of a tower of height h meters. It takes T seconds to reach the ground. What is the position of the ball in T/3 second

Discussion

3795.	A sphere of mass m , moving with a velocity V, enters a hanging bag of sand and stops. If the mass of the bag is M and is raised by a height h; then find the velocity of sphere in terms of m, M and h
Answer» A sphere of mass m , moving with a velocity V, enters a hanging bag of sand and stops. If the mass of the bag is M and is raised by a height h; then find the velocity of sphere in terms of m, M and h

Discussion

3796.	What is a switch. Of what material it is made of?
Answer» What is a switch. Of what material it is made of?

Discussion

3797.	A block of Mass 1 kg traveling in a straight line with a velocity of 10 m/s collides with and sticks to a stationary wooden block of Mass 5kg . Then they both move off together in the same straight line.Calculate the total momentum just before the impact, just after the impact and the velocity of the combined object
Answer» A block of Mass 1 kg traveling in a straight line with a velocity of 10 m/s collides with and sticks to a stationary wooden block of Mass 5kg . Then they both move off together in the same straight line.Calculate the total momentum just before the impact, just after the impact and the velocity of the combined object

Discussion

3798.	Calculate the total hours in the year 3248.8784
Answer» Calculate the total hours in the year 3248. 8784

Discussion

3799.	the acceleration time graph of a particle moving in a straight line is as shown in the figure.at time t=0,the velocity of particle is 10m/s.what is the velocity at t=8s
Answer» the acceleration time graph of a particle moving in a straight line is as shown in the figure.at time t=0,the velocity of particle is 10m/s.what is the velocity at t=8s

Discussion

3800.	At which height from the earth's surface does the acceleration due to gravity decrease by 75% of its value at earth's surface
Answer» At which height from the earth's surface does the acceleration due to gravity decrease by 75% of its value at earth's surface

Discussion

Explore topic-wise InterviewSolutions in .

A dam has broader walls at the bottom than at the top. Explain.

Brakes are applied to a moving track to produce retordation if 5 meter/ second square If the time taken between application of brakes in a truck to stop is 2 second caluclate the distance travelled by the truck during this time

Question 70(v)A man started his journey on his car from Location A and came back. The given graph shows his position at different times during the whole journey.​At what time did he have the fastest speed?

Question 6Which one of the following forces is a contact force?(a) force of gravity(b) force of friction(c) magnetic force(d) electrostatic force

Match the following quantities with their corresponding representations of units.

When a copper ball is heated, the largest percentage increase will occur in its:

An imaginary radioactive element decays to form elements X1,X2,X3,X4,X5 and X6, by ejecting two β-particles, followed by an α-particle, and again two (β-particles followed by an α -particle. What are the mass number and the atomic number of X6?

The radius of Earth is about 6400 km and that of Mars is 3200 km. The mass of the Earth is about 10 times the mass of Mars. If an object weighs 200 N on the surface of Earth, its weight on the surface of Mars will be

a body is moving with a velocity of 15m/s and it comes to rest in 20m/s, what was the acceleration

The average velocity of a particle moving in a straight line, with constant acceleration ‘a’ and initial velocity u in first t seconds is:

10 kg ball is dropped from a height of 10 m. What is the speed of the ball just before it reaches the ground?

37.A man is running with 100 m/s velocity eastwards on a straight road. Rain appears to him, falling at an angle of 37^° east of vertical downward. Now the man doubles his speed. Then the rain appears to him to fall at 53^° with vertical. Find velocity of the rain.

If acceleration depends on time such that a= 4-2t, where a and t are in SI units, then change in velocity during time interval t=0 s to t=2 s, is

An object has moved through a distance.can it have zero displacement ? If yes, support your answer with an example.

Question 30What do you understand by fuel efficiency?

In the h-parameter model of the 2-port network given in the figure shown, the value of h22 (in S) is1.25

A coin is gently dropped from a height of 20 m. If its velocity increases uniformly at the rate of 10m/s2, with what velocity and after what time will it strike the ground?

The potential energy of a body of mass 2kg is given as U=3x+4y.The magnitude of accelerationif the body is?

A POINT B LIES ON THE PERPENDICULAR BISECTOR.OF AN ELECTRIC DIPOLE OF DIPOLE MOMENT p THE DISTANCE OF B FROM THE DIPOLE IS r(r is much larger thn the size of the dipole) THE ELECTRICAL INTENSITY AT B IS PROPORTIONAL TO?

Duke never jumped on Chuck again because _____________. (i) Duke was paralysed and unable to jump (ii) Chuck was angry with Duke for jumping at him (iii) Duke realized that Chuck was not well and could not balance himself (iv) Marcy did not allow Duke to come near Chuck

A 0.3i- 0.4j+ ck . Calculate the value of c if A is a vector.Given

A block is hanging by a string. What will be the tension in the string given the mass of the block is m?

47.when the incident ray are not parallax then which of the following parameter for the spherical mirror will be different from when the incident ray parallax. 1. Pole 2. Focus 3. Radius of curvature 4. Principal axis

Find the electric current that flows through a conductor if a charge of 0.8 C flows through it in 4 seconds.

Acceleration of a body is given by a = 2t+3t^2 ms^-2.Calculate its velocity. Given that its initial velocity is 5m/s.

44.if the mass of one object is doubled and the mass of the other remains the same and if the distance between them is halved, then how does the gravitational force change.(hint :try using the Newton's law of gravitation)

A washing machine rated 300 W is operated one and half hour/day. If the cost of unit of power is Rs.3.50, find the cost of operating a washing machine for the month of september

An object experiences a net zero external unbalanced force .Is it possible for the object to be travelling with a non zero velocity?

An object has velocity v= 20i+30j m/s at t=0s. It undergoes a constant acceleration a=-10j . then time t at which v(t) is perpendicular to 'a' is

Two bodies of masses 3 kg and 12 kg are placed at a distance of 12 m. The third body of mass 0.5 kg is to be placed at such a point that the force acting on this body is zero. Find the position of that point.

The speed of light in water and glass is v1 and v2, respectively. The refractive index wng of the glass with respect to the water is .

Give reason for the following: In most of the cases, we cannot see the vibrations of a sound producing object with our eyes.

What is lateral displacement

निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए − तीसरे दिन सुबह अतिथि ने क्या कहा?

The plot of the variation of potential difference across a combination of three identical cells in series, versus current is shown below. What is the emf and internal resistance of each cell ?

the value of acceleration due to gravity will be 1% of its value at the surface of earth at a height of(take Re=6400km)

bullets of.03kgmass each hit a plate at the rate of 200 bullets per sec with velocity30m/s.the average force acting on plate in newton is

n object of mass 3kg is moving eastwards with velocity 1 m/s and another object of mass 2 kg is moving northwards with velocity 2 m/s. Find the velocity of centre of mass.

Two rods of length l1 and l2 are made of materials whose coefficient of linear expansion are α1 and α2. If difference between two lengths is independent of temperature then

a packet of weight W is dropped with the help of a parachute and on striking the ground comes to rest with a retardation equal to twice the acceleration due to gravity. what is the force exerted on the ground? W 2W 3W 4W

S.I. unit of heat is:

A ball is released from the top of a tower of height h meters. It takes T seconds to reach the ground. What is the position of the ball in T/3 second

A sphere of mass m , moving with a velocity V, enters a hanging bag of sand and stops. If the mass of the bag is M and is raised by a height h; then find the velocity of sphere in terms of m, M and h

What is a switch. Of what material it is made of?

Calculate the total hours in the year 3248.8784

the acceleration time graph of a particle moving in a straight line is as shown in the figure.at time t=0,the velocity of particle is 10m/s.what is the velocity at t=8s

At which height from the earth's surface does the acceleration due to gravity decrease by 75% of its value at earth's surface

Question 70(v)A man started his journey on his car from Location A and came back. The given graph shows his position at different times during the whole journey.At what time did he have the fastest speed?