13232 + Interview Questions in Physics Page 173 InterviewSolution

8601.	A man driving a car can read a distant road sign clearly but finds difficulty in reading the odometer on the dashboard of the car. Which of the following is a correct statement?
Answer» A man driving a car can read a distant road sign clearly but finds difficulty in reading the odometer on the dashboard of the car. Which of the following is a correct statement?

Discussion

8602.	Consider the concepts of work and energy (presuming you have already studied it) and those of impuse and momentum. Force and time is related to momentum change; in the same manner force and displacement pertains to ___________.
Answer» Consider the concepts of work and energy (presuming you have already studied it) and those of impuse and momentum. Force and time is related to momentum change; in the same manner force and displacement pertains to ___________.

Discussion

8603.	Cite an experiment to show that sound needs a material medium for its propogation.
Answer» Cite an experiment to show that sound needs a material medium for its propogation.

Discussion

8604.	What is the acceleration of a van that starts from rest and attains a speed of 20 ms in 25 seconds?
Answer» What is the acceleration of a van that starts from rest and attains a speed of $20 \frac{m}{s}$ in 25 seconds?

Discussion

8605.	Examples of law of conservation of energy...
Answer» Examples of law of conservation of energy...

Discussion

8606.	What is 'SONAR' ? State the principle on which it is based.
Answer» What is 'SONAR' ? State the principle on which it is based.

Discussion

8607.	First law of motion??? . explain!!
Answer» First law of motion??? . explain!!

Discussion

8608.	(a) What happens to the work done when the displacement of a body is at right angles to the direction of force acting on it ? Explain your answer. (b) A force of 50 N acts on a body and moves it a distance of 4 m on a horzontal surface. Calculate the work done if the direction of force is at an angle of 60∘ to the horizontal surface.
Answer» (a) What happens to the work done when the displacement of a body is at right angles to the direction of force acting on it ? Explain your answer. (b) A force of 50 N acts on a body and moves it a distance of 4 m on a horzontal surface. Calculate the work done if the direction of force is at an angle of $60^{\circ}$ to the horizontal surface.

8608.

(a) What happens to the work done when the displacement of a body is at right angles to the direction of force acting on it ? Explain your answer. (b) A force of 50 N acts on a body and moves it a distance of 4 m on a horzontal surface. Calculate the work done if the direction of force is at an angle of 60∘ to the horizontal surface.

Answer»

(a) What happens to the work done when the displacement of a body is at right angles to the direction of force acting on it ? Explain your answer.

(b) A force of 50 N acts on a body and moves it a distance of 4 m on a horzontal surface. Calculate the work done if the direction of force is at an angle of $60^{\circ}$ to the horizontal surface.

Discussion

8609.	The magnitude of a physical quantity is 6 Ns. What is this physical quantity?
Answer» The magnitude of a physical quantity is 6 Ns. What is this physical quantity?

Discussion

8610.	(a) What is meant by the 'loudness' of sound ? On what factor does the loudness of a sound depend ? (b) Draw labelled diagrams to represent (a) soft sound, and (b) loud sound, of the same frequency.
Answer» (a) What is meant by the 'loudness' of sound ? On what factor does the loudness of a sound depend ? (b) Draw labelled diagrams to represent (a) soft sound, and (b) loud sound, of the same frequency.

8610.

(a) What is meant by the 'loudness' of sound ? On what factor does the loudness of a sound depend ? (b) Draw labelled diagrams to represent (a) soft sound, and (b) loud sound, of the same frequency.

Answer»

(a) What is meant by the 'loudness' of sound ? On what factor does the loudness of a sound depend ?

(b) Draw labelled diagrams to represent (a) soft sound, and (b) loud sound, of the same frequency.

Discussion

8611.	What is the unit of relative density ?
Answer» What is the unit of relative density ?

Discussion

8612.	Explain why, a piece of glass sinks in water but it floats in mercury.
Answer» Explain why, a piece of glass sinks in water but it floats in mercury.

Discussion

8613.	Which of the following distance-time graph for a moving car represents uniform motion?
Answer» Which of the following distance-time graph for a moving car represents uniform motion?

Discussion

8614.	A bullet of mass 20g moving with a velocity of 100 ms−1 strikes a wooden block of mass 80g at rest and gets embedded into it. Calculate the velocity of the combined system.
Answer» A bullet of mass $20 g$ moving with a velocity of $100 m s^{- 1}$ strikes a wooden block of mass $80 g$ at rest and gets embedded into it. Calculate the velocity of the combined system.

Discussion

8615.	What are fuels formed under the earth's surface by the decomposition of organic matter called?
Answer» What are fuels formed under the earth's surface by the decomposition of organic matter called?

Discussion

8616.	a trolley whilegoingdown to an inclined plane has an accleration of 2 cm s-2 what will be its velocity in 3 sec after thestart
Answer» a trolley whilegoingdown to an inclined plane has an accleration of 2 cm s-2 what will be its velocity in 3 sec after thestart

Discussion

8617.	A scooter can produce a maximum acceletation of 5m/s^2.it's brakes can produce a maximum retardation for 10m/s^2.find the minimum time in which it starts from rest covers a distance of 1.5km and stops again?
Answer» A scooter can produce a maximum acceletation of 5m/s^2.it's brakes can produce a maximum retardation for 10m/s^2.find the minimum time in which it starts from rest covers a distance of 1.5km and stops again?

Discussion

8618.	A child stands at the centre of a turntable with his two arms outstretched. The turntable is set rotating with an angular speed of 40 rpm. How much is the angular speed of the child if he folds his hands back and thereby reduces his moment if inertia to 2/5 times the initial value? Assume that the turntable rotates without friction.
Answer» A child stands at the centre of a turntable with his two arms outstretched. The turntable is set rotating with an angular speed of 40 rpm. How much is the angular speed of the child if he folds his hands back and thereby reduces his moment if inertia to 2/5 times the initial value? Assume that the turntable rotates without friction.

Discussion

8619.	What type of mirror – inner surface and the outer surface of the spoon acts as?
Answer» What type of mirror – inner surface and the outer surface of the spoon acts as?

Discussion

8620.	What is reverberation ? What will happen if the reverberation time in a big hall is too long ?
Answer» What is reverberation ? What will happen if the reverberation time in a big hall is too long ?

Discussion

8621.	What is the derived unit for electrical power?
Answer» What is the derived unit for electrical power?

Discussion

8622.	A body covers a distance S in time t. What is its speed?
Answer» A body covers a distance S in time t. What is its speed?

Discussion

8623.	Three resistors 2 Ω, 3 Ω and 4 Ω are connected in series in a circuit. The total resistance of the circuit is
Answer» Three resistors $2 Ω, 3 Ω$ and $4 Ω$ are connected in series in a circuit. The total resistance of the circuit is

Discussion

8624.	Scientifically, work is said to be done in which of the following cases
Answer» Scientifically, work is said to be done in which of the following cases

Discussion

8625.	Mn and Mp represent mass of neutron and proton respectively. If an element having nuclear mass M has N - neutrons and Z - protons, then the correct relation will be
Answer» $M_{n}$ and $M_{p}$ represent mass of neutron and proton respectively. If an element having nuclear mass M has N - neutrons and Z - protons, then the correct relation will be

Discussion

8626.	Assuming the electric consumption per day to be 12 kWh and the rate of electricity to be Rs 6.25 per unit,find how much money is to be paid in a month of 30 days.
Answer» Assuming the electric consumption per day to be 12 kWh and the rate of electricity to be Rs 6.25 per unit,find how much money is to be paid in a month of 30 days.

Discussion

8627.	Suppose we have a solenoid with two ends A and B. If current at face A is clockwise while at B is anticlockwise. So, A and B act as:-
Answer» Suppose we have a solenoid with two ends A and B. If current at face A is clockwise while at B is anticlockwise. So, A and B act as:-

Discussion

8628.	A body of mass m is moving with velocity v. If P is the momentum associated with the body and K.E is the kinetic energy. Then K.E and P are related as:
Answer» A body of mass m is moving with velocity v. If P is the momentum associated with the body and K.E is the kinetic energy. Then K.E and P are related as:

Discussion

8629.	What is cellulose?
Answer» What is cellulose?

Discussion

8630.	Give reasons (1) The glass fills completely The vessel in which it kept (2) A gas exert pressure on the walls of the container. (3) A wooden table should be called a solid. (4) We can easily move our hand in air but to do the same through a solid block of wood we need a Karate expert.
Answer» Give reasons (1) The glass fills completely The vessel in which it kept (2) A gas exert pressure on the walls of the container. (3) A wooden table should be called a solid. (4) We can easily move our hand in air but to do the same through a solid block of wood we need a Karate expert.

Discussion

8631.	Define uniform circular motion.is it accelerated motion?
Answer» Define uniform circular motion.is it accelerated motion?

Discussion

8632.	The following figure shows the modern energy efficient appliances, similarly which of the following options shows efficient use of energy?
Answer» The following figure shows the modern energy efficient appliances, similarly which of the following options shows efficient use of energy?

8632.

The following figure shows the modern energy efficient appliances, similarly which of the following options shows efficient use of energy?

Answer»

The following figure shows the modern energy efficient appliances, similarly which of the following options shows efficient use of energy?

Discussion

8633.	One example of bioticmcomponents of the biosphere
Answer» One example of bioticmcomponents of the biosphere

Discussion

8634.	in my textbook , it states that athletes in a high jump competition are made to fall on either a sand bed or a cushion padding , as it increases the time of the athletes fall to stop after making the jump. This decreases the raye of change of momentum and hence the force. However if this were the case , if I jumped off a building , my time taken is a lot and thereby rate of change of momentum is decreased so wouldnt i survive the fall ?
Answer» in my textbook , it states that athletes in a high jump competition are made to fall on either a sand bed or a cushion padding , as it increases the time of the athletes fall to stop after making the jump. This decreases the raye of change of momentum and hence the force. However if this were the case , if I jumped off a building , my time taken is a lot and thereby rate of change of momentum is decreased so wouldnt i survive the fall ?

Discussion

8635.	What type of motion is the motion along a straight line? Explain
Answer» What type of motion is the motion along a straight line? Explain

Discussion

8636.	The motion under gravity is an example of
Answer» The motion under gravity is an example of

Discussion

8637.	True or false and give reason for your answer anything that is dependent on its individual and final point then it is called as vectar
Answer» True or false and give reason for your answer anything that is dependent on its individual and final point then it is called as vectar

8637.

True or false and give reason for your answer anything that is dependent on its individual and final point then it is called as vectar

Answer»

True or false and give reason for your answer

anything that is dependent on its individual and final point then it is called as vectar

Discussion

8638.	The inability of body to change its state of uniform motion or rest is known as
Answer» The inability of body to change its state of uniform motion or rest is known as

Discussion

8639.	Change of position result in potential energy. Is that true?
Answer» Change of position result in potential energy. Is that true?

Discussion

8640.	When you step ashore from a stationary boat, it tends to leave the shore. Explain.
Answer» When you step ashore from a stationary boat, it tends to leave the shore. Explain.

Discussion

8641.	An ox can apply a maximum force of 1000 N. It is taking part in a cart race and is able to pull the cart at a constant speed of 30 m/s while making its best effort. Calculate the power developed by the ox.
Answer» An ox can apply a maximum force of 1000 N. It is taking part in a cart race and is able to pull the cart at a constant speed of 30 m/s while making its best effort. Calculate the power developed by the ox.

Discussion

8642.	Ram is standing 165 m behind Shyam. Shyam is standing 'd' meters away from a wall in the same line. Ram claps and Shyam hears the echo of clap after 2 seconds he heard sound of direct clap. Find the value of 'd'. (Assume speed of sound to be 330 ms−1)
Answer» Ram is standing 165 m behind Shyam. Shyam is standing 'd' meters away from a wall in the same line. Ram claps and Shyam hears the echo of clap after 2 seconds he heard sound of direct clap. Find the value of 'd'. (Assume speed of sound to be $330 m s^{- 1}$ )

Discussion

8643.	When we fill the balloon with air and leave it does its mass decreases?
Answer» When we fill the balloon with air and leave it does its mass decreases?

Discussion

8644.	A body is moving with a velocity of 10m/s .if the motion is uniform.what will be the velocity after 10 sec
Answer» A body is moving with a velocity of 10m/s .if the motion is uniform.what will be the velocity after 10 sec

Discussion

8645.	Choose the correct option regarding inertia:
Answer» Choose the correct option regarding inertia:

Discussion

8646.	What is the difference between average speed and average velocity?
Answer» What is the difference between average speed and average velocity?

Discussion

8647.	Find the time for which a force of 1kgf acts on a body of mass 1 kg moving with a uniform speed of 4m/s to stop the body.
Answer» Find the time for which a force of 1kgf acts on a body of mass 1 kg moving with a uniform speed of 4m/s to stop the body.

Discussion

8648.	Who introduced the word lows of motion?
Answer» Who introduced the word lows of motion?

Discussion

8649.	The force required producing acceleration 2m/s2 on an object of 10 kg mass is:
Answer» The force required producing acceleration 2m/s² on an object of 10 kg mass is:

Discussion

8650.	A hydrogen balloon rises in air because
Answer» A hydrogen balloon rises in air because

Discussion

Explore topic-wise InterviewSolutions in .

A man driving a car can read a distant road sign clearly but finds difficulty in reading the odometer on the dashboard of the car. Which of the following is a correct statement?

Consider the concepts of work and energy (presuming you have already studied it) and those of impuse and momentum. Force and time is related to momentum change; in the same manner force and displacement pertains to ___________.

Cite an experiment to show that sound needs a material medium for its propogation.

What is the acceleration of a van that starts from rest and attains a speed of 20 ms in 25 seconds?

Examples of law of conservation of energy...

What is 'SONAR' ? State the principle on which it is based.

First law of motion??? . explain!!

The magnitude of a physical quantity is 6 Ns. What is this physical quantity?

(a) What is meant by the 'loudness' of sound ? On what factor does the loudness of a sound depend ? (b) Draw labelled diagrams to represent (a) soft sound, and (b) loud sound, of the same frequency.

What is the unit of relative density ?

Explain why, a piece of glass sinks in water but it floats in mercury.

Which of the following distance-time graph for a moving car represents uniform motion?

A bullet of mass 20g moving with a velocity of 100 ms−1 strikes a wooden block of mass 80g at rest and gets embedded into it. Calculate the velocity of the combined system.

What are fuels formed under the earth's surface by the decomposition of organic matter called?

a trolley whilegoingdown to an inclined plane has an accleration of 2 cm s-2 what will be its velocity in 3 sec after thestart

A scooter can produce a maximum acceletation of 5m/s^2.it's brakes can produce a maximum retardation for 10m/s^2.find the minimum time in which it starts from rest covers a distance of 1.5km and stops again?

What type of mirror – inner surface and the outer surface of the spoon acts as?

What is reverberation ? What will happen if the reverberation time in a big hall is too long ?

What is the derived unit for electrical power?

A body covers a distance S in time t. What is its speed?

Three resistors 2 Ω, 3 Ω and 4 Ω are connected in series in a circuit. The total resistance of the circuit is

Scientifically, work is said to be done in which of the following cases

Mn and Mp represent mass of neutron and proton respectively. If an element having nuclear mass M has N - neutrons and Z - protons, then the correct relation will be

Assuming the electric consumption per day to be 12 kWh and the rate of electricity to be Rs 6.25 per unit,find how much money is to be paid in a month of 30 days.

Suppose we have a solenoid with two ends A and B. If current at face A is clockwise while at B is anticlockwise. So, A and B act as:-

A body of mass m is moving with velocity v. If P is the momentum associated with the body and K.E is the kinetic energy. Then K.E and P are related as:

What is cellulose?

Give reasons (1) The glass fills completely The vessel in which it kept (2) A gas exert pressure on the walls of the container. (3) A wooden table should be called a solid. (4) We can easily move our hand in air but to do the same through a solid block of wood we need a Karate expert.

Define uniform circular motion.is it accelerated motion?

The following figure shows the modern energy efficient appliances, similarly which of the following options shows efficient use of energy?

One example of bioticmcomponents of the biosphere

What type of motion is the motion along a straight line? Explain

The motion under gravity is an example of

True or false and give reason for your answer anything that is dependent on its individual and final point then it is called as vectar

The inability of body to change its state of uniform motion or rest is known as

Change of position result in potential energy. Is that true?

When you step ashore from a stationary boat, it tends to leave the shore. Explain.

An ox can apply a maximum force of 1000 N. It is taking part in a cart race and is able to pull the cart at a constant speed of 30 m/s while making its best effort. Calculate the power developed by the ox.

Ram is standing 165 m behind Shyam. Shyam is standing 'd' meters away from a wall in the same line. Ram claps and Shyam hears the echo of clap after 2 seconds he heard sound of direct clap. Find the value of 'd'. (Assume speed of sound to be 330 ms−1)

When we fill the balloon with air and leave it does its mass decreases?

A body is moving with a velocity of 10m/s .if the motion is uniform.what will be the velocity after 10 sec

Choose the correct option regarding inertia:

What is the difference between average speed and average velocity?

Find the time for which a force of 1kgf acts on a body of mass 1 kg moving with a uniform speed of 4m/s to stop the body.

Who introduced the word lows of motion?

The force required producing acceleration 2m/s2 on an object of 10 kg mass is:

A hydrogen balloon rises in air because