InterviewSolution
Saved Bookmarks
InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 11801. |
What is momentum? I can't understand definition |
| Answer» What is momentum? I can't understand definition | |
| 11802. |
what is virtual quantity? |
|
Answer» what is virtual quantity? |
|
| 11803. |
A TV set picture tube shoots out a beam of electrons. The current due to this beam is 10mA. Then, the total number of electrons that will strike the TV screen every second are___ |
|
Answer» A TV set picture tube shoots out a beam of electrons. The current due to this beam is 10mA. Then, the total number of electrons that will strike the TV screen every second are |
|
| 11804. |
Define Scalar and vector quantity |
|
Answer» Define Scalar and vector quantity |
|
| 11805. |
An object can have zero average velocity but cannot have zero average speed. Justify. |
| Answer» An object can have zero average velocity but cannot have zero average speed. Justify. | |
| 11806. |
A motorcycle and a truck are both moving in the same direction in adjacent lanes on a highway. At a particular instant, the speed of motorcycle is four times as large as the speed of truck v. At that instant, motorcycle is accelerating forward while the truck is moving at a constant velocity. Which one of the following statements best describes which vehicle has a larger momentum at that instant? |
|
Answer» A motorcycle and a truck are both moving in the same direction in adjacent lanes on a highway. At a particular instant, the speed of motorcycle is four times as large as the speed of truck v. At that instant, motorcycle is accelerating forward while the truck is moving at a constant velocity. Which one of the following statements best describes which vehicle has a larger momentum at that instant? |
|
| 11807. |
Question 99 (i) Use a ruler to measure the distance in cm between the places joined by dotted lines. If the map has been drawn using the scale, 1 cm : 10 km, find the actual distances between School and Library |
|
Answer» Question 99 (i) Use a ruler to measure the distance in cm between the places joined by dotted lines. If the map has been drawn using the scale, 1 cm : 10 km, find the actual distances between School and Library 
|
|
| 11808. |
How did the values of charge-to-mass ratio of an electron and charge of an electron(Millikan's oil drop experiment) come? |
| Answer» How did the values of charge-to-mass ratio of an electron and charge of an electron(Millikan's oil drop experiment) come? | |
| 11809. |
What can you say about the nature of motion of a body if its displacement-time graph is (a) a straight line parallel to time axis? (b) a straight line inclined to the time axis with an acute angle? (c) a straight line inclined to the time axis with an obtuse angle? (d) a curve? |
|
Answer» What can you say about the nature of motion of a body if its displacement-time graph is (a) a straight line parallel to time axis? (b) a straight line inclined to the time axis with an acute angle? (c) a straight line inclined to the time axis with an obtuse angle? (d) a curve? |
|
| 11810. |
Define a fundamental unit. |
|
Answer» Define a fundamental unit. |
|
| 11811. |
When the effort arm is greater than the load arm then the Mechanical Advantage(M.A) is |
|
Answer» When the effort arm is greater than the load arm then the Mechanical Advantage(M.A) is |
|
| 11812. |
Find the energy in kWh consumed in 10 hrs by a machine of power 500W. |
|
Answer» Find the energy in kWh consumed in 10 hrs by a machine of power 500W. |
|
| 11813. |
There is a thin uniform disc of radius R and mass per unit area σ, in which a hole of radius R/2 has been cut out as shown in the figure. Inside the hole a square plate of same mass per unit area σ is inserted so that its corners touch the periphery of the hole. Find centre of mass of the system distance from O. |
|
Answer» There is a thin uniform disc of radius R and mass per unit area σ, in which a hole of radius R/2 has been cut out as shown in the figure. Inside the hole a square plate of same mass per unit area σ is inserted so that its corners touch the periphery of the hole. Find centre of mass of the system distance from O. |
|
| 11814. |
If the energy of a ball falling from a height of 10 metres is reduced by 40%, how high will it rebound? Answer in a understand able manner |
|
Answer» If the energy of a ball falling from a height of 10 metres is reduced by 40%, how high will it rebound? Answer in a understand able manner |
|
| 11815. |
Define1watt of power |
| Answer» Define1watt of power | |
| 11816. |
Can there be a situation where it is necessary to increase air resistance on a falling object? How is it done? |
| Answer» Can there be a situation where it is necessary to increase air resistance on a falling object? How is it done? | |
| 11817. |
A rectangular wooden block has length, breadth and height of 50 cm, 25 cm and 10 cm, respectively. This wooden block is kept on ground in three different ways, turn by turn. Which of the following is the correct statement about the pressure exerted by this block on the ground ? (a) the maximum pressure is exerted when the length and breadth form the base (b) the maximum pressure is exerted when length and height form the base (c) the maximum pressure is exerted when breadth and height form the base (d) the minimum pressure ig exerted when length and height form the base |
|
Answer» A rectangular wooden block has length, breadth and height of 50 cm, 25 cm and 10 cm, respectively. This wooden block is kept on ground in three different ways, turn by turn. Which of the following is the correct statement about the pressure exerted by this block on the ground ? |
|
| 11818. |
What causes reflection? |
| Answer» What causes reflection? | |
| 11819. |
By which energy we are able to move our hands? |
|
Answer» By which energy we are able to move our hands? |
|
| 11820. |
If the work done on a body at two instances in 20 s and 40 s are same, then what is the ratio of the powers? |
|
Answer» If the work done on a body at two instances in 20 s and 40 s are same, then what is the ratio of the powers? |
|
| 11821. |
A ball is dropped from a height of 10m. If the of the ball reduces by 40% after striking the ground the ball will rebound to |
|
Answer» A ball is dropped from a height of 10m. If the of the ball reduces by 40% after striking the ground the ball will rebound to |
|
| 11822. |
Calculate the resistance of copper wire having a length of 1 km and diameter 0.5 mm. (Resistivity of copper =1.7×10−8 Ωm) |
|
Answer» Calculate the resistance of copper wire having a length of 1 km and diameter 0.5 mm. |
|
| 11823. |
Define the term amplitude of a wave. Write its S.I. unit. |
|
Answer» Define the term amplitude of a wave. Write its S.I. unit. |
|
| 11824. |
Why does a piece of ice when touched with hand, appear cool ? Explain. |
|
Answer» Why does a piece of ice when touched with hand, appear cool ? Explain. |
|
| 11825. |
Can average speed of moving object be zero? |
|
Answer» Can average speed of moving object be zero? |
|
| 11826. |
The rate of change of displacement is known as ___. |
|
Answer» The rate of change of displacement is known as |
|
| 11827. |
Which of the following device does not work on the multiple reflections of sound waves ? (a) slethoscope (b) hydrophone (c) soundboard (d) megaphone |
|
Answer» Which of the following device does not work on the multiple reflections of sound waves ? (a) slethoscope (b) hydrophone (c) soundboard (d) megaphone |
|
| 11828. |
Perfect definition of work |
| Answer» Perfect definition of work | |
| 11829. |
A ball is thrown vertically up from ground with a velocity of 50 ms−1. Find the total distance travelled by the ball just before reaching ground. |
|
Answer» A ball is thrown vertically up from ground with a velocity of 50 ms−1. Find the total distance travelled by the ball just before reaching ground. |
|
| 11830. |
Give reason a) why does a gunman get a jerk on firing a bullet? b)why are car seat belts designed to stretch somewhat in a collision? C)when a hanging carpet is beaten with a stick, the dust particles start coming out of it. |
|
Answer» Give reason a) why does a gunman get a jerk on firing a bullet? b)why are car seat belts designed to stretch somewhat in a collision? C)when a hanging carpet is beaten with a stick, the dust particles start coming out of it. |
|
| 11831. |
What is the different between non-uniform velocity and acceleration? |
|
Answer» What is the different between non-uniform velocity and acceleration? |
|
| 11832. |
___ is the quantity of a constant magnitude used to measure the magnitudes of other quantities of the same nature. |
|
Answer» |
|
| 11833. |
Three different objects of mass m1, m2 and m3 are allowed to fall from rest and from the same point along three different frictionless paths. The speed of the three objects on reaching the ground will be in the ratio of |
|
Answer» Three different objects of mass m1, m2 and m3 are allowed to fall from rest and from the same point along three different frictionless paths. The speed of the three objects on reaching the ground will be in the ratio of
|
|
| 11834. |
We know that everything in motion will come to rest. Our earth also start revolving. So my question is if earth start revolving, it will come to rest or not ? If yes then why and if no then why ? |
|
Answer» We know that everything in motion will come to rest. Our earth also start revolving. So my question is if earth start revolving, it will come to rest or not ? If yes then why and if no then why ? |
|
| 11835. |
Why formula of velocity is like : displacement/time . What is the need of displacement Over here in this formula. |
|
Answer» Why formula of velocity is like : displacement/time . What is the need of displacement Over here in this formula. |
|
| 11836. |
A man is standing on a boat in still water if he walks towards the show the boat will A.)move away from the Shore B.)remains stationary C.) move towards the shore or D.)sink |
|
Answer» A man is standing on a boat in still water if he walks towards the show the boat will A.)move away from the Shore B.)remains stationary C.) move towards the shore or D.)sink |
|
| 11837. |
A charge q is placed at the centre of the open end of cylindrical vessel whose height is equal to its radius. The electric flux of electric field of charge q through the surface of the vessel is |
|
Answer» A charge q is placed at the centre of the open end of cylindrical vessel whose height is equal to its radius. The electric flux of electric field of charge q through the surface of the vessel is |
|
| 11838. |
The root mean square speed of 32 g of methane molecules at 27o C is |
|
Answer» The root mean square speed of 32 g of methane molecules at 27o C is |
|
| 11839. |
There are two mutual perpendicular forces acting on an object. One force acts in the direction of motion of the object and other is perpendicular to the motion. During this interval, the kinetic energy of the body changes from 25 J to 100 J. The work done by the force acting perpendicular to the direction of the object is: |
|
Answer» There are two mutual perpendicular forces acting on an object. One force acts in the direction of motion of the object and other is perpendicular to the motion. During this interval, the kinetic energy of the body changes from 25 J to 100 J. The work done by the force acting perpendicular to the direction of the object is: |
|
| 11840. |
An object of 50 kg gets the speed of 10m/s in 5 second from zero velocity. Calculate the required force applied by engine of the car? (in N) ___ |
|
Answer» An object of 50 kg gets the speed of 10m/s in 5 second from zero velocity. Calculate the required force applied by engine of the car? (in N) |
|
| 11841. |
When a balloon is inflated by blowing air into it, the |
|
Answer» When a balloon is inflated by blowing air into it, the
|
|
| 11842. |
A child on a cart with wheels throws a sandbag forward. As a result: |
|
Answer» A child on a cart with wheels throws a sandbag forward. As a result: |
|
| 11843. |
A vehicle is moving on a rough horizontal road with velocity v. The stopping distance will be directly proportional to |
|
Answer» A vehicle is moving on a rough horizontal road with velocity v. The stopping distance will be directly proportional to |
|
| 11844. |
No refraction occurs when the light is incident normally on a boundary between two media. |
|
Answer» No refraction occurs when the light is incident normally on a boundary between two media. |
|
| 11845. |
A body, initially at rest, starts moving with a constant acceleration 2 m s−2. Calculate:(i) the velocity acquired and (ii) the distance travelled in 5 s. |
|
Answer» A body, initially at rest, starts moving with a constant acceleration 2 m s−2. Calculate:(i) the velocity acquired and (ii) the distance travelled in 5 s. |
|
| 11846. |
Explain how the speed of sound can be determined by the method of an echo. |
|
Answer» Explain how the speed of sound can be determined by the method of an echo. |
|
| 11847. |
In the given velocity-time graph, AB shows that the body has |
|
Answer» In the given velocity-time graph, AB shows that the body has
|
|
| 11848. |
A hammer falls freely from the height of 2 m. Calculate the velocity (in m/sec) of the hammer when it just touches the ground. (take g=10m/sec2) |
|
Answer» A hammer falls freely from the height of 2 m. Calculate the velocity (in m/sec) of the hammer when it just touches the ground. (take g=10m/sec2) |
|
| 11849. |
Observe the given distance-time graph Identify the respective speeds of the body when it moves from O (Origin) to A and B to C. |
|
Answer» Observe the given distance-time graph |
|
| 11850. |
A 3000 kg cannon recoils with a velocity of 1 m s−1, when a 15 kg cannon ball is fired from it. If the ball is aimed a target 400 m away, calculate the force (in N) that the ball exerts on the target, when it hits it.750 |
Answer» A 3000 kg cannon recoils with a velocity of 1 m s−1, when a 15 kg cannon ball is fired from it. If the ball is aimed a target 400 m away, calculate the force (in N) that the ball exerts on the target, when it hits it.
|
|
