9478 + Interview Questions in Physics Page 30 InterviewSolution

1451.	Find the cube root -64.
Answer» Find the cube root -64.

Discussion

1452.	A source of sound produces 10 crests and 10 troughs in 0.1 s. Find the frequency of the sound produced.
Answer» A source of sound produces 10 crests and 10 troughs in $0.1 s$ . Find the frequency of the sound produced.

Discussion

1453.	What prerequisites are necessary in identifying a constellation in the sky? [2 MARKS]
Answer» What prerequisites are necessary in identifying a constellation in the sky? [2 MARKS]

Discussion

1454.	Question 5 (d)In the following situations identify the agent exerting the force and the object on which it acts. State the effect of the force in each case.(d) An athlete making a high jump to clear the bar at a certain height.
Answer» Question 5 (d) In the following situations identify the agent exerting the force and the object on which it acts. State the effect of the force in each case. (d) An athlete making a high jump to clear the bar at a certain height.

Discussion

1455.	Answer the following questions.(a) What will you do to find out the boiling point of water?(b) What changes do you see in the appearance of a candle after you have lit it?(c) Can a solid and a solvent be separated from their solution by distillation?
Answer» Answer the following questions. (a) What will you do to find out the boiling point of water? (b) What changes do you see in the appearance of a candle after you have lit it? (c) Can a solid and a solvent be separated from their solution by distillation?

1455.

Answer the following questions.(a) What will you do to find out the boiling point of water?(b) What changes do you see in the appearance of a candle after you have lit it?(c) Can a solid and a solvent be separated from their solution by distillation?

Answer»

Answer the following questions.

(a) What will you do to find out the boiling point of water?

(b) What changes do you see in the appearance of a candle after you have lit it?

(c) Can a solid and a solvent be separated from their solution by distillation?

Discussion

1456.	Which of the following statements is/are correct regarding various scales used for measuring the earthquake? 1. Richter scale measures magnitude of earthquake whereas Mercalli scale is used to measure the intensity of earthquake. 2. Magnitude of earthquake depends on the destruction caused by earthquake. 3. Richter scale is a logarithmic scale. Choose among the options given below:
Answer» Which of the following statements is/are correct regarding various scales used for measuring the earthquake? 1. Richter scale measures magnitude of earthquake whereas Mercalli scale is used to measure the intensity of earthquake. 2. Magnitude of earthquake depends on the destruction caused by earthquake. 3. Richter scale is a logarithmic scale. Choose among the options given below:

1456.

Which of the following statements is/are correct regarding various scales used for measuring the earthquake? 1. Richter scale measures magnitude of earthquake whereas Mercalli scale is used to measure the intensity of earthquake. 2. Magnitude of earthquake depends on the destruction caused by earthquake. 3. Richter scale is a logarithmic scale. Choose among the options given below:

Answer»

Which of the following statements is/are correct regarding various scales used for measuring the earthquake?

1. Richter scale measures magnitude of earthquake whereas Mercalli scale is used to measure the intensity of earthquake.

2. Magnitude of earthquake depends on the destruction caused by earthquake.

3. Richter scale is a logarithmic scale.

Choose among the options given below:

Discussion

1457.	Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpours? Explain.
Answer» Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpours? Explain.

Discussion

1458.	Write true or false for each statement : (a) The S. I. unit of force if kgf. (b) A force always produces both the linear and turning motions. (c) Moment of force = force × perpendicular distance of force from the pivoted point. (d) Less force is needed when applied at a farther distance from the pivoted point. (e) For a given thrust, the pressure is more on a surface of a large area. (g) A man exerts the same pressure on the ground whether he is standing or he is lying. (h) It is easier to hammer a blunt nail into a piece of wood than a sharply pointed nail. (i) The S. I . unit of pressure is Pascal. (j) Water in a lake exerts pressure only at its bottom. (k) A liquid exerts pressure in all directions. (l) Gases exert pressure in all directions. (m) The atmospheric pressure is nearly 105 Pa. (n) Higher we go, greater is the air pressure.
Answer» Write true or false for each statement : (a) The S. I. unit of force if kgf. (b) A force always produces both the linear and turning motions. (c) Moment of force = force $\times$ perpendicular distance of force from the pivoted point. (d) Less force is needed when applied at a farther distance from the pivoted point. (e) For a given thrust, the pressure is more on a surface of a large area. (g) A man exerts the same pressure on the ground whether he is standing or he is lying. (h) It is easier to hammer a blunt nail into a piece of wood than a sharply pointed nail. (i) The S. I . unit of pressure is Pascal. (j) Water in a lake exerts pressure only at its bottom. (k) A liquid exerts pressure in all directions. (l) Gases exert pressure in all directions. (m) The atmospheric pressure is nearly $10^{5}$ Pa. (n) Higher we go, greater is the air pressure.

1458.

Write true or false for each statement : (a) The S. I. unit of force if kgf. (b) A force always produces both the linear and turning motions. (c) Moment of force = force × perpendicular distance of force from the pivoted point. (d) Less force is needed when applied at a farther distance from the pivoted point. (e) For a given thrust, the pressure is more on a surface of a large area. (g) A man exerts the same pressure on the ground whether he is standing or he is lying. (h) It is easier to hammer a blunt nail into a piece of wood than a sharply pointed nail. (i) The S. I . unit of pressure is Pascal. (j) Water in a lake exerts pressure only at its bottom. (k) A liquid exerts pressure in all directions. (l) Gases exert pressure in all directions. (m) The atmospheric pressure is nearly 105 Pa. (n) Higher we go, greater is the air pressure.

Answer»

Write true or false for each statement :

(a) The S. I. unit of force if kgf.

(b) A force always produces both the linear and turning motions.

(c) Moment of force = force $\times$ perpendicular distance of force from the pivoted point.

(d) Less force is needed when applied at a farther distance from the pivoted point.

(e) For a given thrust, the pressure is more on a surface of a large area.

(g) A man exerts the same pressure on the ground whether he is standing or he is lying.

(h) It is easier to hammer a blunt nail into a piece of wood than a sharply pointed nail.

(i) The S. I . unit of pressure is Pascal.

(j) Water in a lake exerts pressure only at its bottom.

(k) A liquid exerts pressure in all directions.

(l) Gases exert pressure in all directions.

(m) The atmospheric pressure is nearly $10^{5}$ Pa.

(n) Higher we go, greater is the air pressure.

Discussion

1459.	Why should we not use landline phones during a lightning strike?
Answer» Why should we not use landline phones during a lightning strike?

Discussion

1460.	Is sun the only star present in our Milky Way galaxy?
Answer» Is sun the only star present in our Milky Way galaxy?

Discussion

1461.	1. IS RADIOACTIVITY A PHYSICAL CHANGE OR CHEMICAL CHANGE
Answer» 1. IS RADIOACTIVITY A PHYSICAL CHANGE OR CHEMICAL CHANGE

Discussion

1462.	two particles A and B having charges q and 2q respectively are placed on a smooth table with a seperation d.A third partcle C is to be clamped on the table in such a way that particles A and B remain at rest under electrical forces.What should be charge on C and where should it be clamped?
Answer» two particles A and B having charges q and 2q respectively are placed on a smooth table with a seperation d.A third partcle C is to be clamped on the table in such a way that particles A and B remain at rest under electrical forces.What should be charge on C and where should it be clamped?

Discussion

1463.	Explain why snowshoes stop you from sinking into the snow.
Answer» Explain why snowshoes stop you from sinking into the snow.

Discussion

1464.	An object is kept at a distance of 0.5 m in front of the plane mirror. The distance between the object and the image is:
Answer» An object is kept at a distance of $0.5 m$ in front of the plane mirror. The distance between the object and the image is:

Discussion

1465.	A luminous object is placed at a distance of 30 cm from the convex lens of focal length 20 cm. On the other side of the lens, at what distance from the lens a convex mirror of radius of curvature 10 cm be placed in order to have an inverted image of the object coinciding with image formed by lens?
Answer» A luminous object is placed at a distance of $30 c m$ from the convex lens of focal length $20 c m$ . On the other side of the lens, at what distance from the lens a convex mirror of radius of curvature $10 c m$ be placed in order to have an inverted image of the object coinciding with image formed by lens?

Discussion

1466.	10.What is friction? How many types of friction?
Answer» 10.What is friction? How many types of friction?

Discussion

1467.	In case of finding Electric field due to charged ring while taking the two horizontal components we integrate with with limit q/2 why is it so?
Answer» In case of finding Electric field due to charged ring while taking the two horizontal components we integrate with with limit q/2 why is it so?

Discussion

1468.	The mixing of gases is generally accompanied by
Answer» The mixing of gases is generally accompanied by

Discussion

1469.	If an object travels at a speed which is equal to the speed of light will its mass increase? And will its weight be infinity?
Answer» If an object travels at a speed which is equal to the speed of light will its mass increase? And will its weight be infinity?

Discussion

1470.	80. 0.5 moles of BaCl2 is mixed with 0.2 mole Na3PO4, find the maximum number of moles of Ba3(PO4)2 that can be formed
Answer» 80. 0.5 moles of BaCl2 is mixed with 0.2 mole Na3PO4, find the maximum number of moles of Ba3(PO4)2 that can be formed

Discussion

1471.	20. What is reversibility cell
Answer» 20. What is reversibility cell

Discussion

1472.	How enthalpy change becomes more negative as adsorption proceeds
Answer» How enthalpy change becomes more negative as adsorption proceeds

Discussion

1473.	A body is subjected to a constant force given by F(N)  iˆ  2ˆj  3kˆ . What is the work done by this forcein moving the body through a distance of 4 m along the z-axis and then 3 m along the y-axis?(1) 18 J (2) 12 J (3) 16 J (4) Zero
Answer» A body is subjected to a constant force given by F(N)  iˆ  2ˆj  3kˆ . What is the work done by this force in moving the body through a distance of 4 m along the z-axis and then 3 m along the y-axis? (1) 18 J (2) 12 J (3) 16 J (4) Zero

Discussion

1474.	I am sorry to ask my question out of syllabus. My question is: We know that the universe is expanding rapidly. Every star and planet is going away from one another faster than the speed of light! Then why it is said that our Galaxy (Milky way Galaxy) is coming nearer to our neighbour galaxy (Andromeda Galaxy) and after many years, these galaxies will collide with each other?
Answer» I am sorry to ask my question out of syllabus. My question is: We know that the universe is expanding rapidly. Every star and planet is going away from one another faster than the speed of light! Then why it is said that our Galaxy (Milky way Galaxy) is coming nearer to our neighbour galaxy (Andromeda Galaxy) and after many years, these galaxies will collide with each other?

1474.

I am sorry to ask my question out of syllabus. My question is: We know that the universe is expanding rapidly. Every star and planet is going away from one another faster than the speed of light! Then why it is said that our Galaxy (Milky way Galaxy) is coming nearer to our neighbour galaxy (Andromeda Galaxy) and after many years, these galaxies will collide with each other?

Answer»

I am sorry to ask my question out of syllabus. My question is:

We know that the universe is expanding rapidly. Every star and planet is going away from one another faster than the speed of light! Then why it is said that our Galaxy (Milky way Galaxy) is coming nearer to our neighbour galaxy (Andromeda Galaxy) and after many years, these galaxies will collide with each other?

Discussion

1475.	Two cells rated 10V ,2Ω and 8 V, 1Ω are connected in parallel to send current in the same direction across a 6 Ω resistor. Find the p.d. across 6 Ω resistor.
Answer» Two cells rated 10V ,2Ω and 8 V, 1Ω are connected in parallel to send current in the same direction across a 6 Ω resistor. Find the p.d. across 6 Ω resistor.

Discussion

1476.	A light ray strikes a plane mirror making an angle of 25∘ with the mirror. The angle between the incident and reflected ray is
Answer» A light ray strikes a plane mirror making an angle of $25^{\circ}$ with the mirror. The angle between the incident and reflected ray is

Discussion

1477.	Find the roots of the eqation 5x^2-6x-2=0 by the method of completing the square.
Answer» Find the roots of the eqation 5x^2-6x-2=0 by the method of completing the square.

Discussion

1478.	44) Small droplets of a liquid are usually more spherical in shape than the larger drops of the same liquid because A) the force of gravity and the force of S.T. act in the same direction and are equal B) the force of gravity predominates the force of S.T. C) the force of S.T. predominates the force of gravity D) the force of S.T. is equal and opposite to the force of gravity
Answer» 44) Small droplets of a liquid are usually more spherical in shape than the larger drops of the same liquid because A) the force of gravity and the force of S.T. act in the same direction and are equal B) the force of gravity predominates the force of S.T. C) the force of S.T. predominates the force of gravity D) the force of S.T. is equal and opposite to the force of gravity

Discussion

1479.	An automobile of mass ′m′ accelerates starting from origin and initailly at rest, while the engine supplies constant power P . The position is given as a function of time by :
Answer» An automobile of mass $^{'} m^{'}$ accelerates starting from origin and initailly at rest, while the engine supplies constant power $P$ . The position is given as a function of time by :

Discussion

1480.	Which of the option is not correct for artificial satellites?
Answer» Which of the option is not correct for artificial satellites?

Discussion

1481.	The earth acts like a huge magnet with its north pole near which part of the earth?(a) Geographical North Pole(b) Geographical South Pole(c) Centre of the equator(d) point on the equator
Answer» The earth acts like a huge magnet with its north pole near which part of the earth? (a) Geographical North Pole (b) Geographical South Pole (c) Centre of the equator (d) point on the equator

Discussion

1482.	Question 12A horse continues to apply a force in order to move a cart with a constant speed. Explain why?
Answer» Question 12 A horse continues to apply a force in order to move a cart with a constant speed. Explain why?

Discussion

1483.	1. Suppose you apply a force of 5N parallel to a wall , what will be the thrust ?
Answer» 1. Suppose you apply a force of 5N parallel to a wall , what will be the thrust ?

Discussion

1484.	Sound travelled faster in solids than liquids or gasses. then why do people cover their ears with their hand,a solid,when they feel irritated
Answer» Sound travelled faster in solids than liquids or gasses. then why do people cover their ears with their hand,a solid,when they feel irritated

Discussion

1485.	Two small spheres each having the charge +Q are suspended by insulating threads of length L from a hook. This arrangement is taken in space where there is no gravitational effect. Then the angle between the two threads at the point of suspension and the tension in each thread will be
Answer» Two small spheres each having the charge $+ Q$ are suspended by insulating threads of length $L$ from a hook. This arrangement is taken in space where there is no gravitational effect. Then the angle between the two threads at the point of suspension and the tension in each thread will be

Discussion

1486.	charge be converted into energy and energy cannot be converted into charge . Is this statement true
Answer» charge be converted into energy and energy cannot be converted into charge . Is this statement true

Discussion

1487.	80.Point charge q is placed at rest. At point C at distance r from a short dipole of dipole moment p then the force acting on charge particle is
Answer» 80.Point charge q is placed at rest. At point C at distance r from a short dipole of dipole moment p then the force acting on charge particle is

Discussion

1488.	Give reason why solution of sulphric acid connduct electricity wheras alcohal does not
Answer» Give reason why solution of sulphric acid connduct electricity wheras alcohal does not

Discussion

1489.	A particle is moving in such a way that at one ins†an t,velocit y vector of the particle is (3i+4j) m/s and acceleration vector is( -25i+(-25)j )m/s^2. What is the radius of curvature of the trajectory of the particle at that ins†an t
Answer» A particle is moving in such a way that at one ins†an t,velocit y vector of the particle is (3i+4j) m/s and acceleration vector is( -25i+(-25)j )m/s^2. What is the radius of curvature of the trajectory of the particle at that ins†an t

Discussion

1490.	Ram wants to make a magnet. Which one of these materials can he not use ?
Answer» Ram wants to make a magnet. Which one of these materials can he not use ?

Discussion

1491.	The second law of reflection states that :
Answer» The second law of reflection states that :

Discussion

1492.	Which of the following is not an inflammable substance?
Answer» Which of the following is not an inflammable substance?

Discussion

1493.	A light ray entered a rectangular glass slab. if i be the angle of incidence and e be the angle of emergence, then:
Answer» A light ray entered a rectangular glass slab. if $i$ be the angle of incidence and $e$ be the angle of emergence, then:

Discussion

1494.	Which one of the following devices is used to detect electric charge on an object?
Answer» Which one of the following devices is used to detect electric charge on an object?

Discussion

1495.	Consider a tub with a smooth reflecting bottom filled with water. An incident laser ray is reflected as shown. 'i' and 'r' are the angles of incidence and reflection respectively. Choose the correct statement.
Answer» Consider a tub with a smooth reflecting bottom filled with water. An incident laser ray is reflected as shown. 'i' and 'r' are the angles of incidence and reflection respectively. Choose the correct statement.

Discussion

1496.	A human eye consists of a ___ lens to form ___ images.
Answer» A human eye consists of a ___ lens to form ___ images.

Discussion

1497.	If a light ray from air enters three different media in such a way that the refracted angles are 450, 300 and 600 respectively, then which is the densest medium among the three? In the figure, n1 represents refractive index of air.
Answer» If a light ray from air enters three different media in such a way that the refracted angles are $45^{0}$ , $30^{0}$ and $60^{0}$ respectively, then which is the densest medium among the three? In the figure, $n_{1}$ represents refractive index of air.

1497.

If a light ray from air enters three different media in such a way that the refracted angles are 450, 300 and 600 respectively, then which is the densest medium among the three? In the figure, n1 represents refractive index of air.

Answer»

If a light ray from air enters three different media in such a way that the refracted angles are $45^{0}$ , $30^{0}$ and $60^{0}$ respectively, then which is the densest medium among the three?

In the figure, $n_{1}$ represents refractive index of air.

Discussion

1498.	Why does a rough surface have greater friction than a smooth surface ?
Answer» Why does a rough surface have greater friction than a smooth surface ?

Discussion

1499.	What is spectrum of light?
Answer» What is spectrum of light?

Discussion

1500.	Describe fire and its types.
Answer» Describe fire and its types.

Discussion

Explore topic-wise InterviewSolutions in .

Find the cube root -64.

A source of sound produces 10 crests and 10 troughs in 0.1 s. Find the frequency of the sound produced.

What prerequisites are necessary in identifying a constellation in the sky? [2 MARKS]

Question 5 (d)In the following situations identify the agent exerting the force and the object on which it acts. State the effect of the force in each case.(d) An athlete making a high jump to clear the bar at a certain height.

Answer the following questions.(a) What will you do to find out the boiling point of water?(b) What changes do you see in the appearance of a candle after you have lit it?(c) Can a solid and a solvent be separated from their solution by distillation?

Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpours? Explain.

Why should we not use landline phones during a lightning strike?

Is sun the only star present in our Milky Way galaxy?

1. IS RADIOACTIVITY A PHYSICAL CHANGE OR CHEMICAL CHANGE

two particles A and B having charges q and 2q respectively are placed on a smooth table with a seperation d.A third partcle C is to be clamped on the table in such a way that particles A and B remain at rest under electrical forces.What should be charge on C and where should it be clamped?

Explain why snowshoes stop you from sinking into the snow.

An object is kept at a distance of 0.5 m in front of the plane mirror. The distance between the object and the image is:

A luminous object is placed at a distance of 30 cm from the convex lens of focal length 20 cm. On the other side of the lens, at what distance from the lens a convex mirror of radius of curvature 10 cm be placed in order to have an inverted image of the object coinciding with image formed by lens?

10.What is friction? How many types of friction?

In case of finding Electric field due to charged ring while taking the two horizontal components we integrate with with limit q/2 why is it so?

The mixing of gases is generally accompanied by

If an object travels at a speed which is equal to the speed of light will its mass increase? And will its weight be infinity?

80. 0.5 moles of BaCl2 is mixed with 0.2 mole Na3PO4, find the maximum number of moles of Ba3(PO4)2 that can be formed

20. What is reversibility cell

How enthalpy change becomes more negative as adsorption proceeds

A body is subjected to a constant force given by F(N)  iˆ  2ˆj  3kˆ . What is the work done by this forcein moving the body through a distance of 4 m along the z-axis and then 3 m along the y-axis?(1) 18 J (2) 12 J (3) 16 J (4) Zero

Two cells rated 10V ,2Ω and 8 V, 1Ω are connected in parallel to send current in the same direction across a 6 Ω resistor. Find the p.d. across 6 Ω resistor.

A light ray strikes a plane mirror making an angle of 25∘ with the mirror. The angle between the incident and reflected ray is

Find the roots of the eqation 5x^2-6x-2=0 by the method of completing the square.

An automobile of mass ′m′ accelerates starting from origin and initailly at rest, while the engine supplies constant power P . The position is given as a function of time by :

Which of the option is not correct for artificial satellites?

The earth acts like a huge magnet with its north pole near which part of the earth?(a) Geographical North Pole(b) Geographical South Pole(c) Centre of the equator(d) point on the equator

Question 12A horse continues to apply a force in order to move a cart with a constant speed. Explain why?

1. Suppose you apply a force of 5N parallel to a wall , what will be the thrust ?

Sound travelled faster in solids than liquids or gasses. then why do people cover their ears with their hand,a solid,when they feel irritated

Two small spheres each having the charge +Q are suspended by insulating threads of length L from a hook. This arrangement is taken in space where there is no gravitational effect. Then the angle between the two threads at the point of suspension and the tension in each thread will be

charge be converted into energy and energy cannot be converted into charge . Is this statement true

80.Point charge q is placed at rest. At point C at distance r from a short dipole of dipole moment p then the force acting on charge particle is

Give reason why solution of sulphric acid connduct electricity wheras alcohal does not

A particle is moving in such a way that at one ins†an t,velocit y vector of the particle is (3i+4j) m/s and acceleration vector is( -25i+(-25)j )m/s^2. What is the radius of curvature of the trajectory of the particle at that ins†an t

Ram wants to make a magnet. Which one of these materials can he not use ?

The second law of reflection states that :

Which of the following is not an inflammable substance?

A light ray entered a rectangular glass slab. if i be the angle of incidence and e be the angle of emergence, then:

Which one of the following devices is used to detect electric charge on an object?

Consider a tub with a smooth reflecting bottom filled with water. An incident laser ray is reflected as shown. 'i' and 'r' are the angles of incidence and reflection respectively. Choose the correct statement.

A human eye consists of a ___ lens to form ___ images.

If a light ray from air enters three different media in such a way that the refracted angles are 450, 300 and 600 respectively, then which is the densest medium among the three? In the figure, n1 represents refractive index of air.

Why does a rough surface have greater friction than a smooth surface ?

What is spectrum of light?

Describe fire and its types.

A human eye consists of a _ lens to form _ images.