3752 + Interview Questions in Physics Page 8 InterviewSolution

351.	How does magnet works do they have a magical glue?
Answer» How does magnet works do they have a magical glue?

Discussion

352.	A person holds a bundle of hay over his head for 30 minutes and gets tired. Has he done some work or not? Justify your answer.
Answer» A person holds a bundle of hay over his head for 30 minutes and gets tired. Has he done some work or not? Justify your answer.

Discussion

353.	Which of the following cases represents the incorrect property of magnet?
Answer» Which of the following cases represents the incorrect property of magnet?

Discussion

354.	Jupiter ranks ______, among the brightest objects in the night sky.
Answer» Jupiter ranks ______, among the brightest objects in the night sky.

Discussion

355.	Write down four or five ways to maintain a machine.
Answer» Write down four or five ways to maintain a machine.

Discussion

356.	Find the odd-man-out: (a) cm, kg, dm, hm. (b) step, scale, handful, span. (c) metre, kilogram, gram, second. (d) metre, centimetre, gram, second.
Answer» Find the odd-man-out: (a) cm, kg, dm, hm. (b) step, scale, handful, span. (c) metre, kilogram, gram, second. (d) metre, centimetre, gram, second.

356.

Find the odd-man-out: (a) cm, kg, dm, hm. (b) step, scale, handful, span. (c) metre, kilogram, gram, second. (d) metre, centimetre, gram, second.

Answer»

Find the odd-man-out:

(a) cm, kg, dm, hm.

(b) step, scale, handful, span.

(c) metre, kilogram, gram, second.

(d) metre, centimetre, gram, second.

Discussion

357.	If the Earth's magnetic field has magnitude 3.4 ×10–5 T at magnetic equator. Its value at magnetic poles will be
Answer» If the Earth's magnetic field has magnitude 3.4 ×10–5 T at magnetic equator. Its value at magnetic poles will be

Discussion

358.	A region of darkness, which is formed when the path of light is blocked by an opaque body is called___
Answer» A region of darkness, which is formed when the path of light is blocked by an opaque body is called___

Discussion

359.	A pencil is placed next to a ruler such that the ends of the pencil are at 6.2 cm and 13.9 cm markings on the ruler. What is the length of this pencil?
Answer» A pencil is placed next to a ruler such that the ends of the pencil are at $6.2 c m$ and $13.9 c m$ markings on the ruler. What is the length of this pencil?

Discussion

360.	The switch (open) is represented by the symbolस्विच (खुले) को किस संकेत द्वारा प्रदर्शित किया जाता है?
Answer» The switch (open) is represented by the symbol स्विच (खुले) को किस संकेत द्वारा प्रदर्शित किया जाता है?

Discussion

361.	A magnet is suspended at an angle 60∘ in an uniform external magnetic field of 5×10−4 T. The work done in bringing the magnet in the direction of the magnetic field is (The magnetic moment =20 Am2)
Answer» A magnet is suspended at an angle $60^{\circ}$ in an uniform external magnetic field of $5 \times 10^{- 4} T$ . The work done in bringing the magnet in the direction of the magnetic field is (The magnetic moment $= 20 {Am}^{2}$ )

Discussion

362.	Three identical bar magnets each of magnetic moment M are placed in the form of equilateral triangle as shown in figure then net magnetic moment is
Answer» Three identical bar magnets each of magnetic moment M are placed in the form of equilateral triangle as shown in figure then net magnetic moment is

Discussion

363.	A uniform cubical block of side L rest in a rough horizontal surface with coefficent of friction u. A horizontal force F is applied on block tangentially at upper edge. If there is sufficient friction between block and ground, torque due to normal reaction about its Centre of mass? Given Coefficent of friction u=0.2
Answer» A uniform cubical block of side L rest in a rough horizontal surface with coefficent of friction u. A horizontal force F is applied on block tangentially at upper edge. If there is sufficient friction between block and ground, torque due to normal reaction about its Centre of mass? Given Coefficent of friction u=0.2

Discussion

364.	Two forces are acting in parallel and in the same direction as shown in the figure below. Person A pushes the box of magnitude 20N whereas person B is pulling the box of magnitude 60N. Find the net equivalent force to move the box.
Answer» Two forces are acting in parallel and in the same direction as shown in the figure below. Person A pushes the box of magnitude 20N whereas person B is pulling the box of magnitude 60N. Find the net equivalent force to move the box.

Discussion

365.	The gravitational force between two objects when the distance between them is halved becomes
Answer» The gravitational force between two objects when the distance between them is halved becomes

Discussion

366.	State differences between the laboratory thermometer and the clinical thermometer.
Answer» State differences between the laboratory thermometer and the clinical thermometer.

Discussion

367.	ntIf length of a cylinder is l = (4.00 +- 0.01) cm, radius r = (0.250 +- 0.001) cm and mass m = (6.25 +- 0.01) g. Calculate the percentage error in determination of density.n
Answer» ntIf length of a cylinder is l = (4.00 +- 0.01) cm, radius r = (0.250 +- 0.001) cm and mass m = (6.25 +- 0.01) g. Calculate the percentage error in determination of density.n

Discussion

368.	Which of the following method gives the most accurate length of line segments?
Answer» Which of the following method gives the most accurate length of line segments?

Discussion

369.	SI unit for volume is
Answer» SI unit for volume is

Discussion

370.	Oscillatory motion is defined as:
Answer» Oscillatory motion is defined as:

Discussion

371.	Two satellite Aand B go round the planet P in circular orbitshaving radii 4r and r respectively if the speed of satelliteA is 3v the speed of satellite B WILL BE
Answer» Two satellite Aand B go round the planet P in circular orbitshaving radii 4r and r respectively if the speed of satelliteA is 3v the speed of satellite B WILL BE

Discussion

372.	Question 18 How are the motions of a wheel of a moving bicycle and a mark on the blade of a moving electric fan different? Explain.
Answer» Question 18 How are the motions of a wheel of a moving bicycle and a mark on the blade of a moving electric fan different? Explain.

372.

Question 18 How are the motions of a wheel of a moving bicycle and a mark on the blade of a moving electric fan different? Explain.

Answer»

Question 18

How are the motions of a wheel of a moving bicycle and a mark on the blade of a moving electric fan different? Explain.

Discussion

373.	Which of the following is true for water:-
Answer» Which of the following is true for water:-

Discussion

374.	Sailors can find the directions by freely suspending a piece of ______.
Answer» Sailors can find the directions by freely suspending a piece of ______.

Discussion

375.	66.Two satellites are revolving around the equator close to the earth surface. 1st satellite revolves from east to west and the 2nd one from west to east. A person standing on the equator measures the time period of the two satellites as T1 and T2 respectively. Choose the correct statement 1-T1>T2 2-T1
Answer» 66.Two satellites are revolving around the equator close to the earth surface. 1st satellite revolves from east to west and the 2nd one from west to east. A person standing on the equator measures the time period of the two satellites as T1 and T2 respectively. Choose the correct statement 1-T1>T2 2-T1

Discussion

376.	A/an __________ is a spirally wound wire inside the bulb supported by two thick wires at its ends
Answer» A/an __________ is a spirally wound wire inside the bulb supported by two thick wires at its ends

Discussion

377.	What is the repeating unit in the jali pattern given below?
Answer» What is the repeating unit in the jali pattern given below?

Discussion

378.	what si unit
Answer» what si unit

Discussion

379.	What are the minimum and the maximum values of electric field due to a uniformly charged ring at an axial position?
Answer» What are the minimum and the maximum values of electric field due to a uniformly charged ring at an axial position?

Discussion

380.	Which of these will generate electric current when kept in sunlight but not when kept in the dark?(a) dry cell(b) car battery(c) button cell(d) solar cell
Answer» Which of these will generate electric current when kept in sunlight but not when kept in the dark? (a) dry cell (b) car battery (c) button cell (d) solar cell

Discussion

381.	9. An engine can pump 3000 litre of water to a height of 0.045 km in 10 minute calculate work done by machine and its power rating take efficiency 75%.
Answer» 9. An engine can pump 3000 litre of water to a height of 0.045 km in 10 minute calculate work done by machine and its power rating take efficiency 75%.

Discussion

382.	Which of the following statements is correct about frictional force?
Answer» Which of the following statements is correct about frictional force?

Discussion

383.	Starting from A, Paheli moves along a rectangular path ABCD as shown in figure. She takes 2 minutes to travel each side. Plot a distance-time graph and explain whether the motion is uniform or non-uniform.
Answer» Starting from A, Paheli moves along a rectangular path ABCD as shown in figure. She takes 2 minutes to travel each side. Plot a distance-time graph and explain whether the motion is uniform or non-uniform.

Discussion

384.	Two circular coils mounted parallel to each other on the axis carry steady current. If an observer between the coil reports that one coil carry current in clockwise direction while other in counter clockwise direction then there is 1)steady repulsive force 2)zero force 3)a repulsive force 4)a steady attractive force
Answer» Two circular coils mounted parallel to each other on the axis carry steady current. If an observer between the coil reports that one coil carry current in clockwise direction while other in counter clockwise direction then there is 1)steady repulsive force 2)zero force 3)a repulsive force 4)a steady attractive force

Discussion

385.	Which of the following graphs represent uniform motion?
Answer» Which of the following graphs represent uniform motion?

Discussion

386.	The thickness of a dozen coins on a metre scale was found to be 1.8 cm. What is the thickness of one coin?
Answer» The thickness of a dozen coins on a metre scale was found to be $1.8 c m$ . What is the thickness of one coin?

Discussion

387.	Parul is driving a car constantly at a speed of 30 km/h. Draw a distance-time graph in this case. Also, find the time taken by Parul to cover a distance of 120 km. [4 MARKS]
Answer» Parul is driving a car constantly at a speed of 30 km/h. Draw a distance-time graph in this case. Also, find the time taken by Parul to cover a distance of 120 km. [4 MARKS]

Discussion

388.	Define zeroth law of thermodynamics.
Answer» Define zeroth law of thermodynamics.

Discussion

389.	A plane is held by a chain AB through hinge joints. The plate is pulled with a force T as shown in figure. The tension in the chain is given by
Answer» A plane is held by a chain AB through hinge joints. The plate is pulled with a force T as shown in figure. The tension in the chain is given by

Discussion

390.	Which among the following are Non-Central forces in their characters A)Gravitational force in Interaction B)Electromagnetic interaction C)Strong nuclear interaction
Answer» Which among the following are Non-Central forces in their characters A)Gravitational force in Interaction B)Electromagnetic interaction C)Strong nuclear interaction

Discussion

391.	It is advised to drive along the slippery road slowly, because:
Answer» It is advised to drive along the slippery road slowly, because:

Discussion

392.	How much distance does a car cover in 1.5 hours if it is moving at a constant speed of 60 kmph?
Answer» How much distance does a car cover in 1.5 hours if it is moving at a constant speed of 60 kmph?

Discussion

393.	how electric field is distributed due to infinitely long line charge. express it in detail with well labelled diagram.
Answer» how electric field is distributed due to infinitely long line charge. express it in detail with well labelled diagram.

Discussion

394.	Let S = {(a,b):a,bZ,0a,b18}. The number of elements (x,y) in S such that 3x + 4y + 5 is divisible by 19 is : (A) 38(B) 19(C) 18(D) 1
Answer» Let S = {(a,b):a,bZ,0a,b18}. The number of elements (x,y) in S such that 3x + 4y + 5 is divisible by 19 is : (A) 38(B) 19(C) 18(D) 1

Discussion

395.	A piece of an iron rod is used to measure lengths and distances in _______ objects.
Answer» A piece of an iron rod is used to measure lengths and distances in _______ objects.

Discussion

396.	Which of the following are contact forces?
Answer» Which of the following are contact forces?

Discussion

397.	Find the speed of vehicles which cover: (a) A distance of 600 km in 8 hours. (b) A distance of 294 km in 7 hours. (c) A distance of 1368 m in 18 seconds.
Answer» Find the speed of vehicles which cover: (a) A distance of 600 km in 8 hours. (b) A distance of 294 km in 7 hours. (c) A distance of 1368 m in 18 seconds.

Discussion

398.	If we can see only partially through an object, then such an object is called
Answer» If we can see only partially through an object, then such an object is called

Discussion

399.	Specify the sign conventions required for all types of mirrors
Answer» Specify the sign conventions required for all types of mirrors

Discussion

400.	What are celestial objects?
Answer» What are celestial objects?

Discussion

Explore topic-wise InterviewSolutions in .

How does magnet works do they have a magical glue?

A person holds a bundle of hay over his head for 30 minutes and gets tired. Has he done some work or not? Justify your answer.

Which of the following cases represents the incorrect property of magnet?

Jupiter ranks ______, among the brightest objects in the night sky.

Write down four or five ways to maintain a machine.

Find the odd-man-out: (a) cm, kg, dm, hm. (b) step, scale, handful, span. (c) metre, kilogram, gram, second. (d) metre, centimetre, gram, second.

If the Earth's magnetic field has magnitude 3.4 ×10–5 T at magnetic equator. Its value at magnetic poles will be

A region of darkness, which is formed when the path of light is blocked by an opaque body is called___

A pencil is placed next to a ruler such that the ends of the pencil are at 6.2 cm and 13.9 cm markings on the ruler. What is the length of this pencil?

The switch (open) is represented by the symbolस्विच (खुले) को किस संकेत द्वारा प्रदर्शित किया जाता है?

A magnet is suspended at an angle 60∘ in an uniform external magnetic field of 5×10−4 T. The work done in bringing the magnet in the direction of the magnetic field is (The magnetic moment =20 Am2)

Three identical bar magnets each of magnetic moment M are placed in the form of equilateral triangle as shown in figure then net magnetic moment is

Two forces are acting in parallel and in the same direction as shown in the figure below. Person A pushes the box of magnitude 20N whereas person B is pulling the box of magnitude 60N. Find the net equivalent force to move the box.

The gravitational force between two objects when the distance between them is halved becomes

State differences between the laboratory thermometer and the clinical thermometer.

ntIf length of a cylinder is l = (4.00 +- 0.01) cm, radius r = (0.250 +- 0.001) cm and mass m = (6.25 +- 0.01) g. Calculate the percentage error in determination of density.n

Which of the following method gives the most accurate length of line segments?

SI unit for volume is

Oscillatory motion is defined as:

Two satellite Aand B go round the planet P in circular orbitshaving radii 4r and r respectively if the speed of satelliteA is 3v the speed of satellite B WILL BE

Question 18 How are the motions of a wheel of a moving bicycle and a mark on the blade of a moving electric fan different? Explain.

Which of the following is true for water:-

Sailors can find the directions by freely suspending a piece of ______.

A/an __________ is a spirally wound wire inside the bulb supported by two thick wires at its ends

What is the repeating unit in the jali pattern given below?

what si unit

What are the minimum and the maximum values of electric field due to a uniformly charged ring at an axial position?

Which of these will generate electric current when kept in sunlight but not when kept in the dark?(a) dry cell(b) car battery(c) button cell(d) solar cell

9. An engine can pump 3000 litre of water to a height of 0.045 km in 10 minute calculate work done by machine and its power rating take efficiency 75%.

Which of the following statements is correct about frictional force?

Starting from A, Paheli moves along a rectangular path ABCD as shown in figure. She takes 2 minutes to travel each side. Plot a distance-time graph and explain whether the motion is uniform or non-uniform.

Which of the following graphs represent uniform motion?

The thickness of a dozen coins on a metre scale was found to be 1.8 cm. What is the thickness of one coin?

Parul is driving a car constantly at a speed of 30 km/h. Draw a distance-time graph in this case. Also, find the time taken by Parul to cover a distance of 120 km. [4 MARKS]

Define zeroth law of thermodynamics.

A plane is held by a chain AB through hinge joints. The plate is pulled with a force T as shown in figure. The tension in the chain is given by

Which among the following are Non-Central forces in their characters A)Gravitational force in Interaction B)Electromagnetic interaction C)Strong nuclear interaction

It is advised to drive along the slippery road slowly, because:

How much distance does a car cover in 1.5 hours if it is moving at a constant speed of 60 kmph?

how electric field is distributed due to infinitely long line charge. express it in detail with well labelled diagram.

Let S = {(a,b):a,bZ,0a,b18}. The number of elements (x,y) in S such that 3x + 4y + 5 is divisible by 19 is : (A) 38(B) 19(C) 18(D) 1

A piece of an iron rod is used to measure lengths and distances in _______ objects.

Which of the following are contact forces?

Find the speed of vehicles which cover: (a) A distance of 600 km in 8 hours. (b) A distance of 294 km in 7 hours. (c) A distance of 1368 m in 18 seconds.

If we can see only partially through an object, then such an object is called

Specify the sign conventions required for all types of mirrors

What are celestial objects?