16569 + Interview Questions in Physics

1.	The ratio of the difference between first and second Bohrs orbit energy to that between second and third Bohr orbit energy for H atom is
Answer» The ratio of the difference between first and second Bohrs orbit energy to that between second and third Bohr orbit energy for H atom is

Discussion

2.	In what ways can a motor be made more powerful?
Answer» In what ways can a motor be made more powerful?

Discussion

3.	Magnetic quantum number signifies:
Answer» Magnetic quantum number signifies:

Discussion

4.	How electric field lines are open and magnetic field lines form close continuous loops?
Answer» How electric field lines are open and magnetic field lines form close continuous loops?

Discussion

5.	Can the polarity of magnetic field produced by a current carrying solenoid can be reversed by reversing the ends of the solenoid ie, by connecting upside down?
Answer» Can the polarity of magnetic field produced by a current carrying solenoid can be reversed by reversing the ends of the solenoid ie, by connecting upside down?

Discussion

6.	A virtual image twice as big as the object is formed by a convex lens when the object is 10 cm away from it. A real image twice as big as the object will be formed when it is placed at a distance from the lens
Answer» A virtual image twice as big as the object is formed by a convex lens when the object is 10 cm away from it. A real image twice as big as the object will be formed when it is placed at a distance from the lens

Discussion

7.	91. A person is holding a bucket by applying a force of 10N. He moves a horizontal distance of 5m and then climbs up a vertical distance of 10m. Find the total work done by him.
Answer» 91. A person is holding a bucket by applying a force of 10N. He moves a horizontal distance of 5m and then climbs up a vertical distance of 10m. Find the total work done by him.

Discussion

8.	why protons doesn't move
Answer» why protons doesn't move

Discussion

9.	A batsman hits two balls of different masses 0.5 kg and 1 kg out of the stadium, the velocity with which these balls travel is the same. What would be the ratio of their kinetic energies?
Answer» A batsman hits two balls of different masses $0.5 k g$ and $1 k g$ out of the stadium, the velocity with which these balls travel is the same. What would be the ratio of their kinetic energies?

Discussion

10.	Energy equivalent to 4 g of a substance is
Answer» Energy equivalent to $4 g$ of a substance is

Discussion

11.	When a current of 100 mA is passed through a galvanometer, it gives a full deflection of 100 divisions . If resistance of galvanometer is 500 Ω, calculate its voltage semitivity.
Answer» When a current of $100 mA$ is passed through a galvanometer, it gives a full deflection of $100$ divisions . If resistance of galvanometer is $500 Ω$ , calculate its voltage semitivity.

Discussion

12.	What is the current rating of a fuse for an appliance with a power rating of 2.2 kW at 220 V?
Answer» What is the current rating of a fuse for an appliance with a power rating of $2.2 k W$ at $220 V$ ?

Discussion

13.	A particle on the Earth's surface is given a velocity equal to its escape velocity. Its total mechanical energy remains ___.
Answer» A particle on the Earth's surface is given a velocity equal to its escape velocity. Its total mechanical energy remains ___.

Discussion

14.	If the lamps are both the same in the fiugre given below and if A1 reads 0.50 A, What do A2,A3,A4andA5 read?
Answer» If the lamps are both the same in the fiugre given below and if $A_{1}$ reads 0.50 A, What do $A_{2}, A_{3}, A_{4} a n d A_{5}$ read?

Discussion

15.	A meteorite of mass 5 kg has a velocity of 2 m/s. A lighter meteorite of mass 2 kg has the same momentum. Calculate the i) KE of the heavier meteorite and (ii) the lighter meteorite respectively are:
Answer» A meteorite of mass 5 kg has a velocity of 2 m/s. A lighter meteorite of mass 2 kg has the same momentum. Calculate the i) KE of the heavier meteorite and (ii) the lighter meteorite respectively are:

Discussion

16.	Choose the correct battery representation (from the end X to the end Y) for the circuit in which three bulbs A, B and C are connected as shown.
Answer» Choose the correct battery representation (from the end X to the end Y) for the circuit in which three bulbs A, B and C are connected as shown.

Discussion

17.	Standing waves are formed on a stationary string. Phase difference between the particles situated between two consecutive node is
Answer» Standing waves are formed on a stationary string. Phase difference between the particles situated between two consecutive node is

Discussion

18.	A thin girl & a fat man have same momentum. Which of the 2 have a greater KE? If the ratio of their masses is 2:5, calculate the ratio of the KE of the man to that of the girl?
Answer» A thin girl & a fat man have same momentum. Which of the 2 have a greater KE? If the ratio of their masses is 2:5, calculate the ratio of the KE of the man to that of the girl?

Discussion

19.	Refractive index of water is 43 for a light ray. Which of the following is correct? vmedium: Speed in the medium λmedium: Wavelength in the medium
Answer» Refractive index of water is $\frac{4}{3}$ for a light ray. Which of the following is correct? $v_{m e d i u m} : Speed in the medium$ $λ_{m e d i u m} : Wavelength in the medium$

Discussion

20.	Above picture is a bi-focal lens, used to correct a presbyopic person, what is region 1 and 2?
Answer» Above picture is a bi-focal lens, used to correct a presbyopic person, what is region 1 and 2?

20.

Above picture is a bi-focal lens, used to correct a presbyopic person, what is region 1 and 2?

Answer»

Above picture is a bi-focal lens, used to correct a presbyopic person, what is region 1 and 2?

Discussion

21.	a parallel beam of light is incident on a diverging lens parallel to the principal axis.as one move axay from the other side on its pricipal axis ,the intensity to the light1) remain cons†an t 2) continiously increase 3)continiously decrease 4)first decrease then increase
Answer» a parallel beam of light is incident on a diverging lens parallel to the principal axis.as one move axay from the other side on its pricipal axis ,the intensity to the light1) remain cons†an t 2) continiously increase 3)continiously decrease 4)first decrease then increase

Discussion

22.	Difference between ac current and dc current?
Answer» Difference between ac current and dc current?

Discussion

23.	A roller coaster is designed such that riders experience weightlessness as they go round the top of a hill whose radius of curvature is 20m.The speed of the car at the top of the hill is b/w (a) 16 & 17 m/s (b) 13 & 14 m/s (c) 14&15 m/s (d)15 &16 m/s
Answer» A roller coaster is designed such that riders experience weightlessness as they go round the top of a hill whose radius of curvature is 20m.The speed of the car at the top of the hill is b/w (a) 16 & 17 m/s (b) 13 & 14 m/s (c) 14&15 m/s (d)15 &16 m/s

Discussion

24.	a heavy uniform chain lies on a horizontal table . if cofficient of friction between chain and table is 0.25 than the maximum fraction of length of chain that can hang over one edge of table is
Answer» a heavy uniform chain lies on a horizontal table . if cofficient of friction between chain and table is 0.25 than the maximum fraction of length of chain that can hang over one edge of table is

Discussion

25.	The image seen in a plane mirror cannot be formed on a screen. What name is given to this type of image?
Answer» The image seen in a plane mirror cannot be formed on a screen. What name is given to this type of image?

Discussion

26.	The magnitude of magnetic force per unit length between two parallel wire having currents I1, I2 and placed at distance d apart is given byand the magnitude of electric force between two charges Q1 and Q2 placed at distance r apart is given byThe electric resistance of medium depends upon permeability (μ) and permitivity (ε) as given belowR ∝ (μ)a (ε)b
Answer» The magnitude of magnetic force per unit length between two parallel wire having currents I1, I2 and placed at distance d apart is given by and the magnitude of electric force between two charges Q1 and Q2 placed at distance r apart is given by The electric resistance of medium depends upon permeability (μ) and permitivity (ε) as given below R ∝ (μ)a (ε)b

Discussion

27.	The number of images formed of a bulb placed between two plane mirrors inclined at an angle of 60∘ is/are
Answer» The number of images formed of a bulb placed between two plane mirrors inclined at an angle of $60^{\circ}$ is/are

Discussion

28.	The linear distance between the pole and the centre of curvature is called ___ .
Answer» The linear distance between the pole and the centre of curvature is called ___ .

Discussion

29.	An arrow fired from a bow attains a maximum height of 5 m from the level it is released. If the mass of the arrow is 500 g, work done by the bow on the arrow is greater than which of the following? Assume g=10m/s2
Answer» An arrow fired from a bow attains a maximum height of 5 m from the level it is released. If the mass of the arrow is 500 g, work done by the bow on the arrow is greater than which of the following? Assume $g = 10 m / s^{2}$

Discussion

30.	The relation between an A C.voltage source antime in Sl onits is120 sin (100 t) cos (100 t) val value ol pealevoltage and frequency will be respectively(1) 120 voll ael 100 HzTMP PET-2002CAS120volt and 100 Hz(2)60 volt and 200 Hz(4) 60 volt and t00 HziT factor
Answer» The relation between an A C.voltage source antime in Sl onits is120 sin (100 t) cos (100 t) val value ol pealevoltage and frequency will be respectively(1) 120 voll ael 100 HzTMP PET-2002CAS120volt and 100 Hz(2)60 volt and 200 Hz(4) 60 volt and t00 HziT factor

Discussion

31.	A tangent galvanometer is connected directly to an ideal battery. If the number of turns in the coil is doubled the deflection will(a) increase(b) decrease(c) remain unchanged(d) either increase or decrease
Answer» A tangent galvanometer is connected directly to an ideal battery. If the number of turns in the coil is doubled the deflection will (a) increase (b) decrease (c) remain unchanged (d) either increase or decrease

Discussion

32.	What is the magnetic field at the pt P of a current carrying wire of length AB (having a current of 2A) shown in figure?
Answer» What is the magnetic field at the pt P of a current carrying wire of length AB (having a current of 2A) shown in figure?

Discussion

33.	is this statement correct→ displacement current is produced by varying electric field as well as varying magnetic field
Answer» is this statement correct→ displacement current is produced by varying electric field as well as varying magnetic field

Discussion

34.	What is absorption spectrum
Answer» What is absorption spectrum

Discussion

35.	(a) What is 'Chipko andolan'? How did it originate?(b) How did the 'Chipko andolan' ultimately benefit the local population? Give any two benefits.
Answer» (a) What is 'Chipko andolan'? How did it originate? (b) How did the 'Chipko andolan' ultimately benefit the local population? Give any two benefits.

Discussion

36.	73. A rod of weight 50N is supported by two parallel knife edge P and Q is in equilibrium in a horizontal position the knife are at distance 10cm from each other the centre of mass of the rod is at distance 3cm from P the normal reaction
Answer» 73. A rod of weight 50N is supported by two parallel knife edge P and Q is in equilibrium in a horizontal position the knife are at distance 10cm from each other the centre of mass of the rod is at distance 3cm from P the normal reaction

Discussion

37.	58. If 5equal pieces of 25 ohm are connected in parallel, then what will be their equivalent resistance ?
Answer» 58. If 5equal pieces of 25 ohm are connected in parallel, then what will be their equivalent resistance ?

Discussion

38.	Two bodies of mass 10 kg and 1000 kg are separated by a distance of 1 m. At what distance a mass of 1 kg should be placed between two masses so that it experiences no net gravitational attraction?
Answer» Two bodies of mass 10 kg and 1000 kg are separated by a distance of 1 m. At what distance a mass of 1 kg should be placed between two masses so that it experiences no net gravitational attraction?

Discussion

39.	A wire of length 80 cm under some tension produces a sound of frequency 256 Hz. What length of wire will produce the sound of frequency 1024 Hz under the same tension?
Answer» A wire of length 80 cm under some tension produces a sound of frequency 256 Hz. What length of wire will produce the sound of frequency 1024 Hz under the same tension?

Discussion

40.	A circular wire fo radius 'R' carries a current 'i'. What will be the magnetic field at its centre?
Answer» A circular wire fo radius 'R' carries a current 'i'. What will be the magnetic field at its centre?

Discussion

41.	Give reasons.(a) Space beyond the earth's atmosphere appears dark.(b) We are able to read while sitting in the shade.(c) We should not observe the solar eclipse with naked eyes.
Answer» Give reasons. (a) Space beyond the earth's atmosphere appears dark. (b) We are able to read while sitting in the shade. (c) We should not observe the solar eclipse with naked eyes.

Discussion

42.	For the logic circuit shown in the figure, the truth table is
Answer» For the logic circuit shown in the figure, the truth table is

Discussion

43.	14.If the radius of the first Bohr orbit of the H atom is r, then radius of 2nd orbit of He+ is OPTIONS:A)3r B)9r C)2r D)r/9
Answer» 14.If the radius of the first Bohr orbit of the H atom is r, then radius of 2nd orbit of He+ is OPTIONS:A)3r B)9r C)2r D)r/9

Discussion

44.	Discuss the following questions and write the answers in your note-books. (a) Bring out the irony in the frog's statement - 'Your song must be your own'. (b) Do you think the end is justified? (c) Do you think the nightingale is 'brainless'? Give reasons for your answer. (d) Inspite of having a melodious voice and being a crowd puller, the nightingale turns out to be a loser and dies. How far is she responsible for her own downfall? (e) Do you agree with the Frog's inference of the Nightingale's character? Give reasons for your answer.
Answer» Discuss the following questions and write the answers in your note-books. (a) Bring out the irony in the frog's statement - 'Your song must be your own'. (b) Do you think the end is justified? (c) Do you think the nightingale is 'brainless'? Give reasons for your answer. (d) Inspite of having a melodious voice and being a crowd puller, the nightingale turns out to be a loser and dies. How far is she responsible for her own downfall? (e) Do you agree with the Frog's inference of the Nightingale's character? Give reasons for your answer.

44.

Discuss the following questions and write the answers in your note-books. (a) Bring out the irony in the frog's statement - 'Your song must be your own'. (b) Do you think the end is justified? (c) Do you think the nightingale is 'brainless'? Give reasons for your answer. (d) Inspite of having a melodious voice and being a crowd puller, the nightingale turns out to be a loser and dies. How far is she responsible for her own downfall? (e) Do you agree with the Frog's inference of the Nightingale's character? Give reasons for your answer.

Answer»

Discuss
the following questions and write the answers in your note-books.

(a)
Bring out the irony in the frog's statement - 'Your song must be your
own'.

(b)
Do you think the end is justified?

(c)
Do you think the nightingale is 'brainless'? Give reasons for your
answer.

(d)
Inspite of having a melodious voice and being a crowd puller, the
nightingale turns out to be a loser and dies. How far is she
responsible for her own downfall?

(e)
Do you agree with the Frog's inference of the Nightingale's
character? Give reasons for your answer.

Discussion

45.	Fill in the following blanks with suitable words: (a) Potential difference is measured in _______ by using a ______ placed in_______ across a component. (b) Copper is a good _______ while plastic is an _________.
Answer» Fill in the following blanks with suitable words: (a) Potential difference is measured in _______ by using a ______ placed in_______ across a component. (b) Copper is a good _______ while plastic is an _________.

Discussion

46.	For a simple pendulum bob, which of the following energies increase as it approaches the mean position?
Answer» For a simple pendulum bob, which of the following energies increase as it approaches the mean position?

Discussion

47.	Nicrome and copper wireof same length and same radius are connected in series .current I is passed through them. Which wire gets heated up more? Justify
Answer» Nicrome and copper wireof same length and same radius are connected in series .current I is passed through them. Which wire gets heated up more? Justify

Discussion

48.	How does a bat make use of ultrasonic waves to find its way?
Answer» How does a bat make use of ultrasonic waves to find its way?

Discussion

49.	Mention two limitations of making use of solar cell panels to meet our domestic needs.
Answer» Mention two limitations of making use of solar cell panels to meet our domestic needs.

Discussion

50.	Two resistors, when connected in series have a total resistance of 25Ω. If they are connected in parallel, the total resistance reduces to 6Ω. Find the values of resistances.
Answer» Two resistors, when connected in series have a total resistance of $25 Ω$ . If they are connected in parallel, the total resistance reduces to $6 Ω$ . Find the values of resistances.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The ratio of the difference between first and second Bohrs orbit energy to that between second and third Bohr orbit energy for H atom is

In what ways can a motor be made more powerful?

Magnetic quantum number signifies:

How electric field lines are open and magnetic field lines form close continuous loops?

Can the polarity of magnetic field produced by a current carrying solenoid can be reversed by reversing the ends of the solenoid ie, by connecting upside down?

A virtual image twice as big as the object is formed by a convex lens when the object is 10 cm away from it. A real image twice as big as the object will be formed when it is placed at a distance from the lens

91. A person is holding a bucket by applying a force of 10N. He moves a horizontal distance of 5m and then climbs up a vertical distance of 10m. Find the total work done by him.

why protons doesn't move

A batsman hits two balls of different masses 0.5 kg and 1 kg out of the stadium, the velocity with which these balls travel is the same. What would be the ratio of their kinetic energies?

Energy equivalent to 4 g of a substance is

When a current of 100 mA is passed through a galvanometer, it gives a full deflection of 100 divisions . If resistance of galvanometer is 500 Ω, calculate its voltage semitivity.

What is the current rating of a fuse for an appliance with a power rating of 2.2 kW at 220 V?

A particle on the Earth's surface is given a velocity equal to its escape velocity. Its total mechanical energy remains ___.

If the lamps are both the same in the fiugre given below and if A1 reads 0.50 A, What do A2,A3,A4andA5 read?

A meteorite of mass 5 kg has a velocity of 2 m/s. A lighter meteorite of mass 2 kg has the same momentum. Calculate the i) KE of the heavier meteorite and (ii) the lighter meteorite respectively are:

Choose the correct battery representation (from the end X to the end Y) for the circuit in which three bulbs A, B and C are connected as shown.

Standing waves are formed on a stationary string. Phase difference between the particles situated between two consecutive node is

A thin girl &amp; a fat man have same momentum. Which of the 2 have a greater KE? If the ratio of their masses is 2:5, calculate the ratio of the KE of the man to that of the girl?

Refractive index of water is 43 for a light ray. Which of the following is correct? vmedium: Speed in the medium λmedium: Wavelength in the medium

Above picture is a bi-focal lens, used to correct a presbyopic person, what is region 1 and 2?

a parallel beam of light is incident on a diverging lens parallel to the principal axis.as one move axay from the other side on its pricipal axis ,the intensity to the light1) remain cons†an t 2) continiously increase 3)continiously decrease 4)first decrease then increase

Difference between ac current and dc current?

A roller coaster is designed such that riders experience weightlessness as they go round the top of a hill whose radius of curvature is 20m.The speed of the car at the top of the hill is b/w (a) 16 & 17 m/s (b) 13 & 14 m/s (c) 14&15 m/s (d)15 &16 m/s

a heavy uniform chain lies on a horizontal table . if cofficient of friction between chain and table is 0.25 than the maximum fraction of length of chain that can hang over one edge of table is

The image seen in a plane mirror cannot be formed on a screen. What name is given to this type of image?

The number of images formed of a bulb placed between two plane mirrors inclined at an angle of 60∘ is/are

The linear distance between the pole and the centre of curvature is called ___ .

An arrow fired from a bow attains a maximum height of 5 m from the level it is released. If the mass of the arrow is 500 g, work done by the bow on the arrow is greater than which of the following? Assume g=10m/s2

The relation between an A C.voltage source antime in Sl onits is120 sin (100 t) cos (100 t) val value ol pealevoltage and frequency will be respectively(1) 120 voll ael 100 HzTMP PET-2002CAS120volt and 100 Hz(2)60 volt and 200 Hz(4) 60 volt and t00 HziT factor

A tangent galvanometer is connected directly to an ideal battery. If the number of turns in the coil is doubled the deflection will(a) increase(b) decrease(c) remain unchanged(d) either increase or decrease

What is the magnetic field at the pt P of a current carrying wire of length AB (having a current of 2A) shown in figure?

is this statement correct→ displacement current is produced by varying electric field as well as varying magnetic field

What is absorption spectrum

(a) What is 'Chipko andolan'? How did it originate?​(b) How did the 'Chipko andolan' ultimately benefit the local population? Give any two benefits.

73. A rod of weight 50N is supported by two parallel knife edge P and Q is in equilibrium in a horizontal position the knife are at distance 10cm from each other the centre of mass of the rod is at distance 3cm from P the normal reaction

58. If 5equal pieces of 25 ohm are connected in parallel, then what will be their equivalent resistance ?

Two bodies of mass 10 kg and 1000 kg are separated by a distance of 1 m. At what distance a mass of 1 kg should be placed between two masses so that it experiences no net gravitational attraction?

A wire of length 80 cm under some tension produces a sound of frequency 256 Hz. What length of wire will produce the sound of frequency 1024 Hz under the same tension?

A circular wire fo radius 'R' carries a current 'i'. What will be the magnetic field at its centre?

Give reasons.(a) Space beyond the earth's atmosphere appears dark.(b) We are able to read while sitting in the shade.(c) We should not observe the solar eclipse with naked eyes.

For the logic circuit shown in the figure, the truth table is

14.If the radius of the first Bohr orbit of the H atom is r, then radius of 2nd orbit of He+ is OPTIONS:A)3r B)9r C)2r D)r/9

Fill in the following blanks with suitable words: (a) Potential difference is measured in _______ by using a ______ placed in_______ across a component. (b) Copper is a good _______ while plastic is an _________.

For a simple pendulum bob, which of the following energies increase as it approaches the mean position?

Nicrome and copper wireof same length and same radius are connected in series .current I is passed through them. Which wire gets heated up more? Justify

How does a bat make use of ultrasonic waves to find its way?

Mention two limitations of making use of solar cell panels to meet our domestic needs.

Two resistors, when connected in series have a total resistance of 25Ω. If they are connected in parallel, the total resistance reduces to 6Ω. Find the values of resistances.

A thin girl & a fat man have same momentum. Which of the 2 have a greater KE? If the ratio of their masses is 2:5, calculate the ratio of the KE of the man to that of the girl?

(a) What is 'Chipko andolan'? How did it originate?(b) How did the 'Chipko andolan' ultimately benefit the local population? Give any two benefits.

Fill in the following blanks with suitable words: (a) Potential difference is measured in ___ by using a placed in_ across a component. (b) Copper is a good _ while plastic is an _______.