16569 + Interview Questions in Physics

1.	As we go 3200 km above the surface of earth, g becomes _______________ times g at the surface of earth.
Answer» As we go 3200 km above the surface of earth, g becomes _______________ times g at the surface of earth.

Discussion

2.	Select the incorrect option regarding mining.
Answer» Select the incorrect option regarding mining.

Discussion

3.	A particle is in conservative field whose potentialenergy (U) varies with position x as shown infigure. The particle is in stable equilibrium at- 1. A,2. B, 3. C, 4. A&C
Answer» A particle is in conservative field whose potentialenergy (U) varies with position x as shown infigure. The particle is in stable equilibrium at- 1. A,2. B, 3. C, 4. A&C

Discussion

4.	when the object is at dis†an ces 4m and 16m , the image formed by same lens are virtual and real respectively and as the same size . The focal length of lens is
Answer» when the object is at dis†an ces 4m and 16m , the image formed by same lens are virtual and real respectively and as the same size . The focal length of lens is

Discussion

5.	The resistance of a galvanometer coil is 48 Ω. What will be the resistance of shunt required to convert it into an ammeter of range 6 times as that of galvanometer?
Answer» The resistance of a galvanometer coil is 48 Ω. What will be the resistance of shunt required to convert it into an ammeter of range 6 times as that of galvanometer?

Discussion

6.	some charges suspended from different threads.charge (b,c)(d,e)repell each other and charge(a,b)(c,e)(a,e)attract each other.then charge on (a)will be what and how explain?
Answer» some charges suspended from different threads.charge (b,c)(d,e)repell each other and charge(a,b)(c,e)(a,e)attract each other.then charge on (a)will be what and how explain?

Discussion

7.	A sound wave goes from medium A to medium B. What can you say about its frequency in both the media?
Answer» A sound wave goes from medium A to medium B. What can you say about its frequency in both the media?

Discussion

8.	what is meant by steady state of capacitor
Answer» what is meant by steady state of capacitor

Discussion

9.	Incandescent bulbs are designed by keeping in mind that the resistance of their filament increases with the increase in temperature. If at room temperature, 100 W, 60 W and 40 W bulbs have filament resistance R100,R60 and R40, respectively, the relation between these resistance is
Answer» Incandescent bulbs are designed by keeping in mind that the resistance of their filament increases with the increase in temperature. If at room temperature, 100 W, 60 W and 40 W bulbs have filament resistance $R_{100}, R_{60} and R_{40}$ , respectively, the relation between these resistance is

Discussion

10.	44.How many neutral points will be obtained when a bar magnet is kept with magnetic moment parallel to earth magnetic field
Answer» 44.How many neutral points will be obtained when a bar magnet is kept with magnetic moment parallel to earth magnetic field

Discussion

11.	Two identical resistors are first connected in series and then in parallel. Find the ratio of equivalent resis†an ces in two cases.
Answer» Two identical resistors are first connected in series and then in parallel. Find the ratio of equivalent resis†an ces in two cases.

Discussion

12.	An equal-biconvex lens (μ=1.5) of focal length 20 cm is cut into two parts and placed in contact as shown in the figure. A liquid of refractive index 1.3 is filled between the two parts of lens. The equivalent focal length of the combination is
Answer» An equal-biconvex lens $(μ = 1.5)$ of focal length $20 c m$ is cut into two parts and placed in contact as shown in the figure. A liquid of refractive index $1.3$ is filled between the two parts of lens. The equivalent focal length of the combination is

Discussion

13.	Question 2Compute the heat generated while transferring 96000 coulombs of charge in one hour through a potential difference of 50 V.
Answer» Question 2 Compute the heat generated while transferring 96000 coulombs of charge in one hour through a potential difference of 50 V.

Discussion

14.	What is Tyndall Effect?
Answer» What is Tyndall Effect?

Discussion

15.	Classify the following amongst the contact and non-contact forces: i) frictional force, ii) normal reaction force iii) force of tension in a string, iv) gravitational force
Answer» Classify the following amongst the contact and non-contact forces: i) frictional force, ii) normal reaction force iii) force of tension in a string, iv) gravitational force

15.

Classify the following amongst the contact and non-contact forces: i) frictional force, ii) normal reaction force iii) force of tension in a string, iv) gravitational force

Answer»

Classify the following amongst the contact and non-contact forces:

i) frictional force,

ii) normal reaction force

iii) force of tension in a string,

iv) gravitational force

Discussion

16.	Statement I: Power = V2R is used only when the potential difference across the resistors are constant. Statement II: Power = I2R is used only when current in the resistors are constant.
Answer» Statement I: Power = $\frac{V^{2}}{R}$ is used only when the potential difference across the resistors are constant. Statement II: Power = $I^{2}$ R is used only when current in the resistors are constant.

16.

Statement I: Power = V2R is used only when the potential difference across the resistors are constant. Statement II: Power = I2R is used only when current in the resistors are constant.

Answer»

Statement I: Power = $\frac{V^{2}}{R}$ is used only when the potential difference across the resistors are constant.

Statement II: Power = $I^{2}$ R is used only when current in the resistors are constant.

Discussion

17.	Which of the following type of electromagnetic radiation has the highest frequency ?
Answer» Which of the following type of electromagnetic radiation has the highest frequency ?

Discussion

18.	calculate the no. of protons,neutrons,electrons in Po4-
Answer» calculate the no. of protons,neutrons,electrons in Po4-

Discussion

19.	Critical angle is that angle of incidence in the denser medium for which the angle of refraction in rarer medium is
Answer» Critical angle is that angle of incidence in the denser medium for which the angle of refraction in rarer medium is

Discussion

20.	Two identical guitars are played by two persons to give notes of the same loudness and pitch. Will they differ in quality ? Give a reason for your answer.
Answer» Two identical guitars are played by two persons to give notes of the same loudness and pitch. Will they differ in quality ? Give a reason for your answer.

Discussion

21.	When the heat supplied causes no change in the temperature of the substance, the heat supplied to the substance is utilised to
Answer» When the heat supplied causes no change in the temperature of the substance, the heat supplied to the substance is utilised to

Discussion

22.	6, A copper wire has diameter 0.5 mm and resistivity of 1.6 x 10-8 Ω will be the length of this wire to make its resistance 10 Ω ? How much docs theQ.-m. What resistance change if the diameter is doubled ?
Answer» 6, A copper wire has diameter 0.5 mm and resistivity of 1.6 x 10-8 Ω will be the length of this wire to make its resistance 10 Ω ? How much docs theQ.-m. What resistance change if the diameter is doubled ?

Discussion

23.	If a light ray incidents normally on one of the faces of a prism of refractive index 2 and the emergent just emerges out grazing second face. Then, angle of deviation is (1)0^° (2)30^° (3)45^° (4)60^°
Answer» If a light ray incidents normally on one of the faces of a prism of refractive index 2 and the emergent just emerges out grazing second face. Then, angle of deviation is (1)0^° (2)30^° (3)45^° (4)60^°

Discussion

24.	Formation of a rainbow is primarily due to ___.
Answer» Formation of a rainbow is primarily due to ___.

Discussion

25.	if a body is dropped from a height R equal to radius of earth above the Earth's surface into a tunnel along the Earth's diameter,correct statement is 1.particle oscillates on both sides to a height R 2.motion of particle is periodic 3.motion is SHM 4.both 1 and 2
Answer» if a body is dropped from a height R equal to radius of earth above the Earth's surface into a tunnel along the Earth's diameter,correct statement is 1.particle oscillates on both sides to a height R 2.motion of particle is periodic 3.motion is SHM 4.both 1 and 2

Discussion

26.	21. A certain dye obsorbs light of / is equal to 4530 Armstrong. Wavelength of flouroscene light is 5080 Armstrong.assing that under given condition 47 percent of the absorbed energy is remmited out as flouroscene. The ratio of quanta emmited out to the quanta absorbed is?
Answer» 21. A certain dye obsorbs light of / is equal to 4530 Armstrong. Wavelength of flouroscene light is 5080 Armstrong.assing that under given condition 47 percent of the absorbed energy is remmited out as flouroscene. The ratio of quanta emmited out to the quanta absorbed is?

Discussion

27.	In an experiment to study the refraction of light through a rectangular glass slab, a student measured the angle of incidence, angle of refraction and the angle of emergence. The student lost the reading of angle of incidence but noted the readings of angle of refraction to be 35° and angle of emergence to be 65°. The angle of incidence is likely to be:(1) 45°(2) 55°(3) 35°(4) 65°
Answer» In an experiment to study the refraction of light through a rectangular glass slab, a student measured the angle of incidence, angle of refraction and the angle of emergence. The student lost the reading of angle of incidence but noted the readings of angle of refraction to be 35° and angle of emergence to be 65°. The angle of incidence is likely to be: (1) 45° (2) 55° (3) 35° (4) 65°

Discussion

28.	ntThree concentric metallic shells A ,B ,C of radii a, b,c have surface densities z,-z,z respectively . Find the potential of A,B,C?n
Answer» ntThree concentric metallic shells A ,B ,C of radii a, b,c have surface densities z,-z,z respectively . Find the potential of A,B,C?n

Discussion

29.	Two circular coils 1 and 2 are made from the same wire but the radius of the 1st coil is twice that of the 2nd coil. What is the ratio of potential difference applied across them so that the magnetic field at their centres is the same? [AIPMT (Prelims) - 2006]1. 32. 43. 64. 2
Answer» Two circular coils 1 and 2 are made from the same wire but the radius of the 1st coil is twice that of the 2nd coil. What is the ratio of potential difference applied across them so that the magnetic field at their centres is the same? [AIPMT (Prelims) - 2006] 1. 3 2. 4 3. 6 4. 2

Discussion

30.	(i) Define the term 'energy' of a body. What is the SI unit of energy?(ii) What are the various forms of energy?(iii) Two bodies having equal masses are moving with uniform speeds of v and 2v, respectively. Find the ratio of their kinetic energies.
Answer» (i) Define the term 'energy' of a body. What is the SI unit of energy? (ii) What are the various forms of energy? (iii) Two bodies having equal masses are moving with uniform speeds of v and 2v, respectively. Find the ratio of their kinetic energies.

Discussion

31.	What are the two conditions for a force to produce a turning effect about any axis?
Answer» What are the two conditions for a force to produce a turning effect about any axis?

Discussion

32.	1) Two identical piano wires, kept under the sametension T have a fundamental frequency of 600 Hz.The fractional increase in the tension of one of thewires which will lead to occurrence of 6 beats/s whenboth the wires oscillate together would be
Answer» 1) Two identical piano wires, kept under the sametension T have a fundamental frequency of 600 Hz.The fractional increase in the tension of one of thewires which will lead to occurrence of 6 beats/s whenboth the wires oscillate together would be

Discussion

33.	24. Constant function
Answer» 24. Constant function

Discussion

34.	For a ray, incident at an angle of 45∘ on a plane mirror the deviation produced in its path will be
Answer» For a ray, incident at an angle of $45^{\circ}$ on a plane mirror the deviation produced in its path will be

Discussion

35.	Describe the flow of direct current (DC) in an electrical circuit
Answer» Describe the flow of direct current (DC) in an electrical circuit

Discussion

36.	if frequencies are f+2,f,f-2 find beat frequency
Answer» if frequencies are f+2,f,f-2 find beat frequency

Discussion

37.	Why is the potential difference same in all the resistors in a parallel circuit?
Answer» Why is the potential difference same in all the resistors in a parallel circuit?

Discussion

38.	The following diagram indicated the energy levels of a certain atom when the system moves from 4E level to E. A photon of wavelength λ1 is emitted. The wavelength of photon emitted during its transition from 73E level to E is λ2. The ratio λ1λ2 will be -
Answer» The following diagram indicated the energy levels of a certain atom when the system moves from $4 E$ level to $E$ . A photon of wavelength $λ_{1}$ is emitted. The wavelength of photon emitted during its transition from $\frac{7}{3} E$ level to $E$ is $λ_{2}$ . The ratio $\frac{λ_{1}}{λ_{2}}$ will be -

Discussion

39.	Answer the following.Name two causes of global warming.
Answer» Answer the following. Name two causes of global warming.

39.

Answer the following.Name two causes of global warming.

Answer»

Answer the following.

Name two causes of global warming.

Discussion

40.	Explain electromagnetic induction.
Answer» Explain electromagnetic induction.

Discussion

41.	What is a lever? How is the class of a lever determined?
Answer» What is a lever? How is the class of a lever determined?

Discussion

42.	An alternating current is given by the following equation,I=3√2sin(100πt+π4)Find the frequency and rms value of the current over a full cycle.
Answer» An alternating current is given by the following equation, $I = 3 \sqrt{2} sin (100 π t + \frac{π}{4})$ Find the frequency and $r m s$ value of the current over a full cycle.

Discussion

43.	What is the nature of the image formed in: Concave lens Convex lensAlso give one use of each lens.
Answer» What is the nature of the image formed in: Concave lens Convex lens Also give one use of each lens.

Discussion

44.	(a) When a concave mirror is used as a shaving mirror, where is the person's face in relation to focus of mirror ? (b) State three characteristics of the image seen in part (a).
Answer» (a) When a concave mirror is used as a shaving mirror, where is the person's face in relation to focus of mirror ? (b) State three characteristics of the image seen in part (a).

44.

(a) When a concave mirror is used as a shaving mirror, where is the person's face in relation to focus of mirror ? (b) State three characteristics of the image seen in part (a).

Answer»

(a) When a concave mirror is used as a shaving mirror, where is the person's face in relation to focus of mirror ?

(b) State three characteristics of the image seen in part (a).

Discussion

45.	An electric circuit has a 30 V battery and a resistor of 90 ohm. Then, the current in the circuit will be:
Answer» An electric circuit has a 30 V battery and a resistor of 90 ohm. Then, the current in the circuit will be:

Discussion

46.	A person has near point at 100 cm. What radius of curvature of lens is needed to read at 20 cm if he/she uses contact lens.(Refractive index of glass lens μ=1.5)
Answer» A person has near point at $100 cm$ . What radius of curvature of lens is needed to read at $20 cm$ if he/she uses contact lens. (Refractive index of glass lens $μ = 1.5$ )

Discussion

47.	What do you mean by solar energy? Write its applications.
Answer» What do you mean by solar energy? Write its applications.

Discussion

48.	How should the two resistances of 8 Ω each must be connected to produce an equivalent resistance of 4 Ω ?
Answer» How should the two resistances of 8 $Ω$ each must be connected to produce an equivalent resistance of 4 $Ω$ ?

Discussion

49.	A boy of height 1m stand infront of convex mirror. His distance from the mirror is equal to its focal length. What is the height of his image?
Answer» A boy of height 1m stand infront of convex mirror. His distance from the mirror is equal to its focal length. What is the height of his image?

Discussion

50.	Name the radiation which can be detected by (a) a thermopile (b) a solution of silver chloride.
Answer» Name the radiation which can be detected by (a) a thermopile (b) a solution of silver chloride.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

As we go 3200 km above the surface of earth, g becomes _______________ times g at the surface of earth.

Select the incorrect option regarding mining.

A particle is in conservative field whose potentialenergy (U) varies with position x as shown infigure. The particle is in stable equilibrium at- 1. A,2. B, 3. C, 4. A&C

when the object is at dis†an ces 4m and 16m , the image formed by same lens are virtual and real respectively and as the same size . The focal length of lens is

The resistance of a galvanometer coil is 48 Ω. What will be the resistance of shunt required to convert it into an ammeter of range 6 times as that of galvanometer?

some charges suspended from different threads.charge (b,c)(d,e)repell each other and charge(a,b)(c,e)(a,e)attract each other.then charge on (a)will be what and how explain?

A sound wave goes from medium A to medium B. What can you say about its frequency in both the media?

what is meant by steady state of capacitor

Incandescent bulbs are designed by keeping in mind that the resistance of their filament increases with the increase in temperature. If at room temperature, 100 W, 60 W and 40 W bulbs have filament resistance R100,R60 and R40, respectively, the relation between these resistance is

44.How many neutral points will be obtained when a bar magnet is kept with magnetic moment parallel to earth magnetic field

Two identical resistors are first connected in series and then in parallel. Find the ratio of equivalent resis†an ces in two cases.

An equal-biconvex lens (μ=1.5) of focal length 20 cm is cut into two parts and placed in contact as shown in the figure. A liquid of refractive index 1.3 is filled between the two parts of lens. The equivalent focal length of the combination is

Question 2Compute the heat generated while transferring 96000 coulombs of charge in one hour through a potential difference of 50 V.

What is Tyndall Effect?

Classify the following amongst the contact and non-contact forces: i) frictional force, ii) normal reaction force iii) force of tension in a string, iv) gravitational force

Statement I: Power = V2R is used only when the potential difference across the resistors are constant. Statement II: Power = I2​R is used only when current in the resistors are constant.

Which of the following type of electromagnetic radiation has the highest frequency ?

calculate the no. of protons,neutrons,electrons in Po4-

Critical angle is that angle of incidence in the denser medium for which the angle of refraction in rarer medium is

Two identical guitars are played by two persons to give notes of the same loudness and pitch. Will they differ in quality ? Give a reason for your answer.

When the heat supplied causes no change in the temperature of the substance, the heat supplied to the substance is utilised to

6, A copper wire has diameter 0.5 mm and resistivity of 1.6 x 10-8 Ω will be the length of this wire to make its resistance 10 Ω ? How much docs theQ.-m. What resistance change if the diameter is doubled ?

If a light ray incidents normally on one of the faces of a prism of refractive index 2 and the emergent just emerges out grazing second face. Then, angle of deviation is (1)0^° (2)30^° (3)45^° (4)60^°

Formation of a rainbow is primarily due to ___.

if a body is dropped from a height R equal to radius of earth above the Earth's surface into a tunnel along the Earth's diameter,correct statement is 1.particle oscillates on both sides to a height R 2.motion of particle is periodic 3.motion is SHM 4.both 1 and 2

21. A certain dye obsorbs light of / is equal to 4530 Armstrong. Wavelength of flouroscene light is 5080 Armstrong.assing that under given condition 47 percent of the absorbed energy is remmited out as flouroscene. The ratio of quanta emmited out to the quanta absorbed is?

ntThree concentric metallic shells A ,B ,C of radii a, b,c have surface densities z,-z,z respectively . Find the potential of A,B,C?n

Two circular coils 1 and 2 are made from the same wire but the radius of the 1st coil is twice that of the 2nd coil. What is the ratio of potential difference applied across them so that the magnetic field at their centres is the same? [AIPMT (Prelims) - 2006]1. 32. 43. 64. 2

(i) Define the term 'energy' of a body. What is the SI unit of energy?(ii) What are the various forms of energy?(iii) Two bodies having equal masses are moving with uniform speeds of v and 2v, respectively. Find the ratio of their kinetic energies.

What are the two conditions for a force to produce a turning effect about any axis?

1) Two identical piano wires, kept under the sametension T have a fundamental frequency of 600 Hz.The fractional increase in the tension of one of thewires which will lead to occurrence of 6 beats/s whenboth the wires oscillate together would be

24. Constant function

For a ray, incident at an angle of 45∘ on a plane mirror the deviation produced in its path will be

Describe the flow of direct current (DC) in an electrical circuit

if frequencies are f+2,f,f-2 find beat frequency

Why is the potential difference same in all the resistors in a parallel circuit?

The following diagram indicated the energy levels of a certain atom when the system moves from 4E level to E. A photon of wavelength λ1 is emitted. The wavelength of photon emitted during its transition from 73E level to E is λ2. The ratio λ1λ2 will be -

Answer the following.Name two causes of global warming.

Explain electromagnetic induction.

What is a lever? How is the class of a lever determined?

An alternating current is given by the following equation,I=3√2sin(100πt+π4)Find the frequency and rms value of the current over a full cycle.

What is the nature of the image formed in: Concave lens Convex lensAlso give one use of each lens.

(a) When a concave mirror is used as a shaving mirror, where is the person's face in relation to focus of mirror ? (b) State three characteristics of the image seen in part (a).

An electric circuit has a 30 V battery and a resistor of 90 ohm. Then, the current in the circuit will be:

A person has near point at 100 cm. What radius of curvature of lens is needed to read at 20 cm if he/she uses contact lens.(Refractive index of glass lens μ=1.5)

What do you mean by solar energy? Write its applications.

How should the two resistances of 8 Ω each must be connected to produce an equivalent resistance of 4 Ω ?

A boy of height 1m stand infront of convex mirror. His distance from the mirror is equal to its focal length. What is the height of his image?

Name the radiation which can be detected by (a) a thermopile (b) a solution of silver chloride.

Statement I: Power = V2R is used only when the potential difference across the resistors are constant. Statement II: Power = I2R is used only when current in the resistors are constant.