13232 + Interview Questions in Physics Page 144 InterviewSolution

7151.	147.What is dimensional formula for pressure
Answer» 147.What is dimensional formula for pressure

Discussion

7152.	In an experiment a metal ball weight 2N in air and 1.5 in water. What is the magnitude of buoyant force acting on it?
Answer» In an experiment a metal ball weight 2N in air and 1.5 in water. What is the magnitude of buoyant force acting on it?

Discussion

7153.	A battery of emf 10 V and internal resistance 3 ohm is connected to a resistor. If the current in the circuit is 0.5 A, what is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed?
Answer» A battery of emf 10 V and internal resistance 3 ohm is connected to a resistor. If the current in the circuit is 0.5 A, what is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed?

Discussion

7154.	What is the equivalent resistance between A and B?
Answer» What is the equivalent resistance between $A$ and $B$ ?

Discussion

7155.	Two equal and opposite forces act on a stationary body. Will the body move ? Give reason to you answer.
Answer» Two equal and opposite forces act on a stationary body. Will the body move ? Give reason to you answer.

Discussion

7156.	What is the place called where vast amounts of oil is trapped?
Answer» What is the place called where vast amounts of oil is trapped?

Discussion

7157.	What is meant by the statement 'the atmospheric pressure at a place is 76 cm of Hg'? State its value in Pa.
Answer» What is meant by the statement 'the atmospheric pressure at a place is 76 cm of Hg'? State its value in Pa.

Discussion

7158.	Which of the following figures represents the uniform motion of a moving object correctly?
Answer» Which of the following figures represents the uniform motion of a moving object correctly?

Discussion

7159.	Three capacitors each of 6 µF are to be connected in such a way that the effective capacitance is 4 µF. This can be done by connecting them
Answer» Three capacitors each of 6 µF are to be connected in such a way that the effective capacitance is 4 µF. This can be done by connecting them

Discussion

7160.	What is momentum? Write its S.I. unit. Interpret force in terms of momentum. Represent the following graphically(a) momentum versus velocity when mass is fixed.(b) momentum versus mass when velocity is constant
Answer» What is momentum? Write its S.I. unit. Interpret force in terms of momentum. Represent the following graphically (a) momentum versus velocity when mass is fixed. (b) momentum versus mass when velocity is constant

Discussion

7161.	A body moves along the path OABC. Which of the following statement about it's position-time graph is true?
Answer» A body moves along the path OABC. Which of the following statement about it's position-time graph is true?

Discussion

7162.	ntfrequency of whistle of engine appears to drop to 2/3 rd of its actual value when it passes a stationary observer . velocity of air = 330 find speed of enginen
Answer» ntfrequency of whistle of engine appears to drop to 2/3 rd of its actual value when it passes a stationary observer . velocity of air = 330 find speed of enginen

Discussion

7163.	Question 18Using second law of motion, derive the relation between force and acceleration. A bullet of 10 g strikes sand-bag at a speed of 103 ms−1 and gets embedded after travelling 5 cm. Calculate(i) the resistive force exerted by the sand on the bullet(ii) the time taken by the bullet to come
Answer» Question 18 Using second law of motion, derive the relation between force and acceleration. A bullet of 10 g strikes sand-bag at a speed of $10^{3} m s^{- 1}$ and gets embedded after travelling 5 cm. Calculate (i) the resistive force exerted by the sand on the bullet (ii) the time taken by the bullet to come

Discussion

7164.	AB is an object and A'B' is its image. Then, match the following with the object distance. f: focal length.
Answer» AB is an object and A'B' is its image. Then, match the following with the object distance. f: focal length.

Discussion

7165.	What will be our weight at center of the earth
Answer» What will be our weight at center of the earth

Discussion

7166.	Calculate the weight of a body of mass 10kg in kgf and newton
Answer» Calculate the weight of a body of mass 10kg in kgf and newton

Discussion

7167.	A piece of the iron nail when kept horizontally on the surface of the sand rests on it. Why does it dig into the sand when kept vertically?
Answer» A piece of the iron nail when kept horizontally on the surface of the sand rests on it. Why does it dig into the sand when kept vertically?

Discussion

7168.	The de brollies wavelength of electron travelling with 10%of velocity of light is 1 242.4pm 2. 24.2 pm 3. 2.42pm 4.0.2424pm
Answer» The de brollies wavelength of electron travelling with 10%of velocity of light is 1 242.4pm 2. 24.2 pm 3. 2.42pm 4.0.2424pm

Discussion

7169.	When the midpoints of four consecutive troughs in a transverse wave are joined, it constitutes a distance of 10 cm. What is the wavelength of the transverse wave?
Answer» When the midpoints of four consecutive troughs in a transverse wave are joined, it constitutes a distance of $10 c m$ . What is the wavelength of the transverse wave?

Discussion

7170.	Which of the following represents electrical power dissipated in an electrical circuit?
Answer» Which of the following represents electrical power dissipated in an electrical circuit?

Discussion

7171.	What is the average speed
Answer» What is the average speed

Discussion

7172.	DB relative density and density
Answer» DB relative density and density

Discussion

7173.	A storage battery of emf 8 v and internal resistance 0.5 ohm is being charged by a 120 v supply using a series resistor of 15.5 ohm. The terminal voltage of battery during charging is(1) 120 v (2) 8.5 v(3) 11.5 v(4) 13.5 v
Answer» A storage battery of emf 8 v and internal resistance 0.5 ohm is being charged by a 120 v supply using a series resistor of 15.5 ohm. The terminal voltage of battery during charging is (1) 120 v (2) 8.5 v (3) 11.5 v (4) 13.5 v

Discussion

7174.	Difference between vi graph and iv graph
Answer» Difference between vi graph and iv graph

Discussion

7175.	Pair the cards with their mirror images.
Answer» Pair the cards with their mirror images.

Discussion

7176.	derive that centripetal acceleration isV^{2 }/r
Answer» derive that centripetal acceleration isV^{2 }/r

Discussion

7177.	A hydraulic lift has a large cross-section and a small cross-section. The large cross-sectional area is 20 times the small cross-sectional area. If on the small cross-section, an input force of 25 N is applied, then the output force is
Answer» A hydraulic lift has a large cross-section and a small cross-section. The large cross-sectional area is 20 times the small cross-sectional area. If on the small cross-section, an input force of 25 N is applied, then the output force is

Discussion

7178.	95. If a body was falling feeling freely from a height of 500 m how much time will it take to reach the ground
Answer» 95. If a body was falling feeling freely from a height of 500 m how much time will it take to reach the ground

Discussion

7179.	2 balls X and Y are thrown from top of tower vertically upward and other vertically downward with same speed.If te taken by them to reach the ground are 6 s and 2 s respectively then height of tower and initial speed of each are
Answer» 2 balls X and Y are thrown from top of tower vertically upward and other vertically downward with same speed.If te taken by them to reach the ground are 6 s and 2 s respectively then height of tower and initial speed of each are

Discussion

7180.	What is a thermal neutron?
Answer» What is a thermal neutron?

Discussion

7181.	Two trains of length 180m and 240m are running on parallel tracks at the speed of 126 kmph and 90kmph. how much time will they take to go pass each other if they travel in the opposite direction ?
Answer» Two trains of length 180m and 240m are running on parallel tracks at the speed of 126 kmph and 90kmph. how much time will they take to go pass each other if they travel in the opposite direction ?

Discussion

7182.	A body starts at a point and reaches the same point after time t. Which of the following represents its displacement time graph?
Answer» A body starts at a point and reaches the same point after time $t$ . Which of the following represents its displacement time graph?

7182.

A body starts at a point and reaches the same point after time t. Which of the following represents its displacement time graph?

Answer»

A body starts at a point and reaches the same point after time $t$ . Which of the following represents its displacement time graph?

Discussion

7183.	The effective resistance between the points A and B in the figure is: -
Answer» The effective resistance between the points A and B in the figure is: -

Discussion

7184.	What is the rate of change of velocity called?
Answer» What is the rate of change of velocity called?

Discussion

7185.	Water applies upthrust on an iron ball when it is completely immersed. Now, the iron ball is taken out and heated and then again it is completely immersed into the water. Compare the upthrust in the initial and final situation.
Answer» Water applies upthrust on an iron ball when it is completely immersed. Now, the iron ball is taken out and heated and then again it is completely immersed into the water. Compare the upthrust in the initial and final situation.

7185.

Water applies upthrust on an iron ball when it is completely immersed. Now, the iron ball is taken out and heated and then again it is completely immersed into the water. Compare the upthrust in the initial and final situation.

Answer»

Water applies upthrust on an iron ball when it is completely immersed. Now, the iron ball is taken out and heated and then again it is completely immersed into the water. Compare the upthrust in the initial and final situation.

Discussion

7186.	What is the difference between uniform motion in straight line and uniform circular motion?
Answer» What is the difference between uniform motion in straight line and uniform circular motion?

Discussion

7187.	What is angular displacement, angular frequency,angular acceleration?
Answer» What is angular displacement, angular frequency,angular acceleration?

Discussion

7188.	37.the wavelength emitted by tuning fork of frequency 100hz is 3.32m. if density of air is 1.29 kg/m3 then gamma for air
Answer» 37.the wavelength emitted by tuning fork of frequency 100hz is 3.32m. if density of air is 1.29 kg/m3 then gamma for air

Discussion

7189.	A water treatment plant is designed to treat 1 m3/s of raw water. It has 14 sand filters. Surface area of each filter is 50 m2. What is the loading rate (in m3/day/m2) with two filters out of service for routine back-washing?144
Answer» A water treatment plant is designed to treat $1 m^{3} / s$ of raw water. It has $14$ sand filters. Surface area of each filter is $50 m^{2}$ . What is the loading rate (in $m^{3} / d a y / m^{2}$ ) with two filters out of service for routine back-washing? 144

Discussion

7190.	What is the expression for average velocity?
Answer» What is the expression for average velocity?

Discussion

7191.	A stone dropped from the top of a tower is found to travel 5/9 of the height of tower during the last second of its fall. The time of fall is (a)2sec (b)3sec (c)4sec (d)5sec
Answer» A stone dropped from the top of a tower is found to travel 5/9 of the height of tower during the last second of its fall. The time of fall is (a)2sec (b)3sec (c)4sec (d)5sec

Discussion

7192.	12 A uniform chain of mass M 2 kg and length L is released with its lower end just touching the horizontalsurface. Find the force, in newton, exerted by the chain on the floor when its half-length has already fallen.10 m/s2(Assuming falling portion does not form any heap) \lbrack g
Answer» 12 A uniform chain of mass M 2 kg and length L is released with its lower end just touching the horizontalsurface. Find the force, in newton, exerted by the chain on the floor when its half-length has already fallen.10 m/s2(Assuming falling portion does not form any heap) \lbrack g

Discussion

7193.	A loaded 200000kg coal wagon is moving on a linear track with a 8m/s.suddenly 8000kg of coal is dropped out of wagon.What is the final speed of the wagon ?
Answer» A loaded 200000kg coal wagon is moving on a linear track with a 8m/s.suddenly 8000kg of coal is dropped out of wagon.What is the final speed of the wagon ?

Discussion

7194.	Starting from rest a car accelerates uniformly with 3meter per second square for 5sec and then moved with uniform velocity draw distance time graph of the motion of the car up to t=7sec
Answer» Starting from rest a car accelerates uniformly with 3meter per second square for 5sec and then moved with uniform velocity draw distance time graph of the motion of the car up to t=7sec

Discussion

7195.	निम्नलिखित शब्दों में उपयुक्त उपसर्ग लगाइए −जैसे : पुत्र − सुपुत्रवास व्यवस्थित कूल गति रोहण रक्षित
Answer» निम्नलिखित शब्दों में उपयुक्त उपसर्ग लगाइए − जैसे : पुत्र − सुपुत्र वास व्यवस्थित कूल गति रोहण रक्षित

7195.

निम्नलिखित शब्दों में उपयुक्त उपसर्ग लगाइए −जैसे : पुत्र − सुपुत्रवास व्यवस्थित कूल गति रोहण रक्षित

Answer»

निम्नलिखित शब्दों में उपयुक्त उपसर्ग लगाइए −

जैसे : पुत्र − सुपुत्र

वास व्यवस्थित कूल गति रोहण रक्षित

Discussion

7196.	Which of the following are examples of insulator?
Answer» Which of the following are examples of insulator?

Discussion

7197.	two objects are thrown up at angles of 45 degree and 60 degree respectively , with the horizontal . If both objects attain same vertical height , then the ratio of magnitude of velocities with which these are projected
Answer» two objects are thrown up at angles of 45 degree and 60 degree respectively , with the horizontal . If both objects attain same vertical height , then the ratio of magnitude of velocities with which these are projected

Discussion

7198.	Why does the sense of hearing gets affected on rapidly gaining or losing height
Answer» Why does the sense of hearing gets affected on rapidly gaining or losing height

Discussion

7199.	A body travels a distance of 3 km towards East, then 4 km towards North and finally 9 km towards East. (i) What is the total distance traveled? (ii) What is the resultant displacement?
Answer» A body travels a distance of 3 km towards East, then 4 km towards North and finally 9 km towards East. (i) What is the total distance traveled? (ii) What is the resultant displacement?

7199.

A body travels a distance of 3 km towards East, then 4 km towards North and finally 9 km towards East. (i) What is the total distance traveled? (ii) What is the resultant displacement?

Answer»

A body travels a distance of 3 km towards East, then 4 km towards North and finally 9 km towards East.

(i) What is the total distance traveled?

(ii) What is the resultant displacement?

Discussion

7200.	What is a food chain ?
Answer» What is a food chain ?

Discussion

Explore topic-wise InterviewSolutions in .

147.What is dimensional formula for pressure

In an experiment a metal ball weight 2N in air and 1.5 in water. What is the magnitude of buoyant force acting on it?

A battery of emf 10 V and internal resistance 3 ohm is connected to a resistor. If the current in the circuit is 0.5 A, what is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed?

What is the equivalent resistance between A and B?

Two equal and opposite forces act on a stationary body. Will the body move ? Give reason to you answer.

What is the place called where vast amounts of oil is trapped?

What is meant by the statement 'the atmospheric pressure at a place is 76 cm of Hg'? State its value in Pa.

Which of the following figures represents the uniform motion of a moving object correctly?

Three capacitors each of 6 µF are to be connected in such a way that the effective capacitance is 4 µF. This can be done by connecting them

What is momentum? Write its S.I. unit. Interpret force in terms of momentum. Represent the following graphically(a) momentum versus velocity when mass is fixed.(b) momentum versus mass when velocity is constant

A body moves along the path OABC. Which of the following statement about it's position-time graph is true?

ntfrequency of whistle of engine appears to drop to 2/3 rd of its actual value when it passes a stationary observer . velocity of air = 330 find speed of enginen

Question 18Using second law of motion, derive the relation between force and acceleration. A bullet of 10 g strikes sand-bag at a speed of 103 ms−1 and gets embedded after travelling 5 cm. Calculate(i) the resistive force exerted by the sand on the bullet(ii) the time taken by the bullet to come

AB is an object and A'B' is its image. Then, match the following with the object distance. f: focal length.

What will be our weight at center of the earth

Calculate the weight of a body of mass 10kg in kgf and newton

A piece of the iron nail when kept horizontally on the surface of the sand rests on it. Why does it dig into the sand when kept vertically?

The de brollies wavelength of electron travelling with 10%of velocity of light is 1 242.4pm 2. 24.2 pm 3. 2.42pm 4.0.2424pm

When the midpoints of four consecutive troughs in a transverse wave are joined, it constitutes a distance of 10 cm. What is the wavelength of the transverse wave?

Which of the following represents electrical power dissipated in an electrical circuit?

What is the average speed

DB relative density and density

A storage battery of emf 8 v and internal resistance 0.5 ohm is being charged by a 120 v supply using a series resistor of 15.5 ohm. The terminal voltage of battery during charging is(1) 120 v (2) 8.5 v(3) 11.5 v(4) 13.5 v

Difference between vi graph and iv graph

Pair the cards with their mirror images.

derive that centripetal acceleration isV^{2 }/r

A hydraulic lift has a large cross-section and a small cross-section. The large cross-sectional area is 20 times the small cross-sectional area. If on the small cross-section, an input force of 25 N is applied, then the output force is

95. If a body was falling feeling freely from a height of 500 m how much time will it take to reach the ground

2 balls X and Y are thrown from top of tower vertically upward and other vertically downward with same speed.If te taken by them to reach the ground are 6 s and 2 s respectively then height of tower and initial speed of each are

What is a thermal neutron?

Two trains of length 180m and 240m are running on parallel tracks at the speed of 126 kmph and 90kmph. how much time will they take to go pass each other if they travel in the opposite direction ?

A body starts at a point and reaches the same point after time t. Which of the following represents its displacement time graph?

The effective resistance between the points A and B in the figure is: -

What is the rate of change of velocity called?

Water applies upthrust on an iron ball when it is completely immersed. Now, the iron ball is taken out and heated and then again it is completely immersed into the water. Compare the upthrust in the initial and final situation.

What is the difference between uniform motion in straight line and uniform circular motion?

What is angular displacement, angular frequency,angular acceleration?

37.the wavelength emitted by tuning fork of frequency 100hz is 3.32m. if density of air is 1.29 kg/m3 then gamma for air

A water treatment plant is designed to treat 1 m3/s of raw water. It has 14 sand filters. Surface area of each filter is 50 m2. What is the loading rate (in m3/day/m2) with two filters out of service for routine back-washing?144

What is the expression for average velocity?

A stone dropped from the top of a tower is found to travel 5/9 of the height of tower during the last second of its fall. The time of fall is (a)2sec (b)3sec (c)4sec (d)5sec

12 A uniform chain of mass M 2 kg and length L is released with its lower end just touching the horizontalsurface. Find the force, in newton, exerted by the chain on the floor when its half-length has already fallen.10 m/s2(Assuming falling portion does not form any heap) \lbrack g

A loaded 200000kg coal wagon is moving on a linear track with a 8m/s.suddenly 8000kg of coal is dropped out of wagon.What is the final speed of the wagon ?

Starting from rest a car accelerates uniformly with 3meter per second square for 5sec and then moved with uniform velocity draw distance time graph of the motion of the car up to t=7sec

निम्नलिखित शब्दों में उपयुक्त उपसर्ग लगाइए −जैसे : पुत्र − सुपुत्रवास व्यवस्थित कूल गति रोहण रक्षित

Which of the following are examples of insulator?

two objects are thrown up at angles of 45 degree and 60 degree respectively , with the horizontal . If both objects attain same vertical height , then the ratio of magnitude of velocities with which these are projected

Why does the sense of hearing gets affected on rapidly gaining or losing height

A body travels a distance of 3 km towards East, then 4 km towards North and finally 9 km towards East. (i) What is the total distance traveled? (ii) What is the resultant displacement?

What is a food chain ?