16569 + Interview Questions in Physics Page 1 InterviewSolution

1.	Explain the sign convention for the spherical mirror.
Answer» Explain the sign convention for the spherical mirror.

Discussion

2.	The magnitude of the force acting on a current carrying wire placed in a magnetic field in the direction perpendicular to its length depends on ___.
Answer» The magnitude of the force acting on a current carrying wire placed in a magnetic field in the direction perpendicular to its length depends on ___.

Discussion

3.	COM OF ROD is at2L/3 then in problems why we take it at L/2
Answer» COM OF ROD is at2L/3 then in problems why we take it at L/2

Discussion

4.	What is responsible for the release of nuclear energy?
Answer» What is responsible for the release of nuclear energy?

Discussion

5.	what is relation between self induction in solenoid with number of turns
Answer» what is relation between self induction in solenoid with number of turns

Discussion

6.	The magnitude of gravitational potential energy of the earth-satellite system is U with zero potential energy at infinite separation.The kinetic energy of satellite is K. Mass of satellite << Mass of earth. Then
Answer» The magnitude of gravitational potential energy of the earth-satellite system is U with zero potential energy at infinite separation.The kinetic energy of satellite is K. Mass of satellite << Mass of earth. Then

Discussion

7.	If in a plano-convex lens, radius of curvature of convex surface is 10 cm and the focal length of lens is 30 cm, the refractive index of the material of the lens will be
Answer» If in a plano-convex lens, radius of curvature of convex surface is $10 cm$ and the focal length of lens is $30 cm$ , the refractive index of the material of the lens will be

Discussion

8.	a. Identify the words in the advertisement that gave away the fact that it was placed by John Garrideb. b. Make a list of words which are spelt differently in American and British English.
Answer» a. Identify the words in the advertisement that gave away the fact that it was placed by John Garrideb. b. Make a list of words which are spelt differently in American and British English.

8.

a. Identify the words in the advertisement that gave away the fact that it was placed by John Garrideb. b. Make a list of words which are spelt differently in American and British English.

Answer»

a. Identify the words in the advertisement that gave away the fact that it was placed by John Garrideb.

b. Make a list of words which are spelt differently in American and British English.

Discussion

9.	(a) Explain the functions of the following parts of the eye : (a) cornea (b) iris (c) pupil (d) ciliary muscles (e) eye-lens (f) retina (g) optic nerve (b) If you walk from a dark room into sunlight and back again into dark room, how would your pupils after in size ? What makes this happen ? (c) Explain why, we cannot see our seats first when we enter a darkened cinema hall from bright light but gradually they become visible.
Answer» (a) Explain the functions of the following parts of the eye : (a) cornea (b) iris (c) pupil (d) ciliary muscles (e) eye-lens (f) retina (g) optic nerve (b) If you walk from a dark room into sunlight and back again into dark room, how would your pupils after in size ? What makes this happen ? (c) Explain why, we cannot see our seats first when we enter a darkened cinema hall from bright light but gradually they become visible.

Discussion

10.	Hypermetropia defect arises due to:
Answer» Hypermetropia defect arises due to:

Discussion

11.	Green and red colours are allowed to fall on a white cricket ball simultaneously. What will be the colour of the ball?
Answer» Green and red colours are allowed to fall on a white cricket ball simultaneously. What will be the colour of the ball?

Discussion

12.	The conductance of a 4.5 kilo ohm resistor is .
Answer» The conductance of a 4.5 kilo ohm resistor is .

Discussion

13.	The difference between reflection of light from a plane mirror and total internal reflection of light from a prism is:
Answer» The difference between reflection of light from a plane mirror and total internal reflection of light from a prism is:

Discussion

14.	how Snell's law joins with the Refractive index,as Snell's law talk about angle and refractive index talk about the optical density.
Answer» how Snell's law joins with the Refractive index,as Snell's law talk about angle and refractive index talk about the optical density.

Discussion

15.	6)The vapour density of PCI5 is 104.16,but when heated at 2300C, its vapour density is reduced to 62. Thepercentage of dissociation of PCI5 at this temperature will be:
Answer» 6)The vapour density of PCI₅ is 104.16, but when heated at 230⁰C, its vapour density is reduced to 62. The percentage of dissociation of PCI₅ at this temperature will be:

Discussion

16.	If a resistance R2 is connected in parallel with the resistance R in the circuit shown, then possible value of current through R and the possible value of R2 will be
Answer» If a resistance $R_{2}$ is connected in parallel with the resistance $R$ in the circuit shown, then possible value of current through $R$ and the possible value of $R_{2}$ will be

Discussion

17.	A beam of light travelling parallel to the principal axis of a concave lens appears to diverge from a point 25 cm behind the lens after refraction. Calculate the power of the lens.
Answer» A beam of light travelling parallel to the principal axis of a concave lens appears to diverge from a point 25 cm behind the lens after refraction. Calculate the power of the lens.

Discussion

18.	In parallel combination, the total resistance of the circuit becomes ___the individual resistances.
Answer» In parallel combination, the total resistance of the circuit becomes ___the individual resistances.

Discussion

19.	The total number of tetrahedral voids in the face centred unit cell is _______.[1 Mark]
Answer» The total number of tetrahedral voids in the face centred unit cell is _______. [1 Mark]

Discussion

20.	A boy lifts a 1 kg block by 1 m. The work done by the boy is: (g = 9.8 metre per second squared)
Answer» A boy lifts a 1 kg block by 1 m. The work done by the boy is: (g = 9.8 metre per second squared)

Discussion

21.	What is the difference between single unit smooth muscle and multi unit smooth muscle?
Answer» What is the difference between single unit smooth muscle and multi unit smooth muscle?

Discussion

22.	The light is incident from air to a medium of the refractive index 43. The Brewster's angle for this scenario will be
Answer» The light is incident from air to a medium of the refractive index $\frac{4}{3}$ . The Brewster's angle for this scenario will be

Discussion

23.	The focal length of a normal and relaxed eye lens is about -
Answer» The focal length of a normal and relaxed eye lens is about -

Discussion

24.	18. What is electrolysis ?
Answer» 18. What is electrolysis ?

Discussion

25.	Two closed organ pipes have length L and L+△ l resp. If velocity of sound in air is V, THEN the no of beats heard per second when the two organ pipes are vibrated together with thei respective fundamental mode is about (△ l
Answer» Two closed organ pipes have length L and L+△ l resp. If velocity of sound in air is V, THEN the no of beats heard per second when the two organ pipes are vibrated together with thei respective fundamental mode is about (△ l<

Discussion

26.	A charge 0.5 C passes through a cross section of a conductor in 5 s. Find the current.
Answer» A charge 0.5 C passes through a cross section of a conductor in 5 s. Find the current.

Discussion

27.	If ∫cos5x dx=nC0⋅sinx−nC1⋅sin3x3+nC2⋅sin5x5+C, then the value of (2n+3)C2 is equal to(where C is integration constant)
Answer» If $\int {cos}^{5} x d x =^{n} C_{0} \cdot sin x -^{n} C_{1} \cdot \frac{{sin}^{3} x}{3} +^{n} C_{2} \cdot \frac{{sin}^{5} x}{5} + C,$ then the value of $^{(2 n + 3)} C_{2}$ is equal to (where $C$ is integration constant)

Discussion

28.	Question 10Why do stars twinkle?
Answer» Question 10 Why do stars twinkle?

Discussion

29.	The network shown in the figure is a part of a complete circuit. If at a certain instant, the current i is 4 A and is increasing at a rate of 103 As−1. Then VB−VA will be-
Answer» The network shown in the figure is a part of a complete circuit. If at a certain instant, the current $i$ is $4 A$ and is increasing at a rate of $10^{3} {As}^{- 1}$ . Then $V_{B} - V_{A}$ will be-

Discussion

30.	Write an article of about 1000 words describing the stress-strain curve for a material. Explain in detail about young's modulus, proportional limit, yield point and fracture point along with the applications of the same.
Answer» Write an article of about 1000 words describing the stress-strain curve for a material. Explain in detail about young's modulus, proportional limit, yield point and fracture point along with the applications of the same.

Discussion

31.	the deflection produced in tangent galvanometer When a current of 1 A is passes through it and its plane is perpendicular to magnetic meridian, given (reduction factor k=1) (1)45^° (3) 90 (2) 60 (4) 0^°
Answer» the deflection produced in tangent galvanometer When a current of 1 A is passes through it and its plane is perpendicular to magnetic meridian, given (reduction factor k=1) (1)45^° (3) 90 (2) 60 (4) 0^°

Discussion

32.	electron deficien
Answer» electron deficien

Discussion

33.	The eyes of a person are focused (i) on a nearby object, and (ii) on a distant object, turn by turn. In which case : (a) the focal length of eye-lens will be the maximum ? (b) the converging power of eye-lens will be the maximum ?
Answer» The eyes of a person are focused (i) on a nearby object, and (ii) on a distant object, turn by turn. In which case : (a) the focal length of eye-lens will be the maximum ? (b) the converging power of eye-lens will be the maximum ?

Discussion

34.	The figure below shows stages in a nuclear fission reaction. The energies of these states are E1,E2 and E3 respectively. Which option is correct?
Answer» The figure below shows stages in a nuclear fission reaction. The energies of these states are $E_{1}, E_{2}$ and $E_{3}$ respectively. Which option is correct?

Discussion

35.	A cubical block of glass of refractive index n1=32 is in contact with the surface of water of refractive index n2=43. A beam of light is incident on the vertical face of the block. After refraction, a total internal reflection occurs at the base and refraction at the opposite face takes place. The ray emerges at angle θ as shown. The value of θ is given by
Answer» A cubical block of glass of refractive index $n_{1} = \frac{3}{2}$ is in contact with the surface of water of refractive index $n_{2} = \frac{4}{3}$ . A beam of light is incident on the vertical face of the block. After refraction, a total internal reflection occurs at the base and refraction at the opposite face takes place. The ray emerges at angle $θ$ as shown. The value of $θ$ is given by

Discussion

36.	15. if a light of ray incidents normally on one of the faces of prism of refractive index 2 and emergent ray just gazes the second face of prism then the angle of deviation is?
Answer» 15. if a light of ray incidents normally on one of the faces of prism of refractive index 2 and emergent ray just gazes the second face of prism then the angle of deviation is?

Discussion

37.	Question 31(a) Locate and name the water reservoirs in figures given below.(b) Which has an advantage over the other and why?
Answer» Question 31 (a) Locate and name the water reservoirs in figures given below. (b) Which has an advantage over the other and why?

Discussion

38.	What is armature
Answer» What is armature

Discussion

39.	It 50 J of work must be done to move an electric charge of 2 C from a point where potential is −10 V to another point where potential is ′V′. The value of V is
Answer» It $50 J$ of work must be done to move an electric charge of $2 C$ from a point where potential is $- 10 V$ to another point where potential is $^{'} V^{'}$ . The value of $V$ is

Discussion

40.	Where should an object be placed in front of a convex lens to get a real image of the size of the object?(a) At the principal focus of the lens(b) At twice the focal length(c) At infinity(d) Between the optical centre of the lens and its principal focus.
Answer» Where should an object be placed in front of a convex lens to get a real image of the size of the object? (a) At the principal focus of the lens (b) At twice the focal length (c) At infinity (d) Between the optical centre of the lens and its principal focus.

40.

Where should an object be placed in front of a convex lens to get a real image of the size of the object?(a) At the principal focus of the lens(b) At twice the focal length(c) At infinity(d) Between the optical centre of the lens and its principal focus.

Answer»

Where should an object be placed in front of a convex lens to get a real image of the size of the object?

(a) At the principal focus of the lens

(b) At twice the focal length

(c) At infinity

(d) Between the optical centre of the lens and its principal focus.

Discussion

41.	37. If an electric bulb of 100 watt is lighted for 2 hours daily , how much electric energy would be consumed. Also find the cost if cost per unit is 2 rupees
Answer» 37. If an electric bulb of 100 watt is lighted for 2 hours daily , how much electric energy would be consumed. Also find the cost if cost per unit is 2 rupees

Discussion

42.	a 10 A fuse wire is used in a mains line in a house .in anither house a 15 A fuse wire is used .the ratio of thier radii is
Answer» a 10 A fuse wire is used in a mains line in a house .in anither house a 15 A fuse wire is used .the ratio of thier radii is

Discussion

43.	Explain with an experiment principle of Electromagnetic induction? Which law will gives the direction of electric current? [5 MARKS]
Answer» Explain with an experiment principle of Electromagnetic induction? Which law will gives the direction of electric current? [5 MARKS]

Discussion

44.	What happens when water is treated with Ca3P2
Answer» What happens when water is treated with Ca3P2

Discussion

45.	Why is an equitable distribution of resources essential in a society? List two forces which are against such distribution.
Answer» Why is an equitable distribution of resources essential in a society? List two forces which are against such distribution.

Discussion

46.	In Fleming’s right-hand rule:
Answer» In Fleming’s right-hand rule:

Discussion

47.	Q. The length of a potentiometer wire is 15 m. An electron in this wire experiences a force of 4.8 \ast 10^{-19}N E.M.F. of new cell used in potentiometer is?
Answer» Q. The length of a potentiometer wire is 15 m. An electron in this wire experiences a force of 4.8 \ast 10^{-19}N E.M.F. of new cell used in potentiometer is?

Discussion

48.	214 Why the magnetic field lines emerging from south direction of earth towards north direction as we all say the magnetic field lines emerging from north to south in the magnet.
Answer» 214 Why the magnetic field lines emerging from south direction of earth towards north direction as we all say the magnetic field lines emerging from north to south in the magnet.

Discussion

49.	A point object O and its real, inverted and diminished image I formed by a concave mirror whose principal axis is AB as shown.The position of concave mirror should be(1) Right of O with its center of curvature lies between O and I on the line AB(2) Left of I with its center of curvature lies between O and I on the line AB(3) Right of O with its center of curvature lies beyond I on the line AB(4) Left of I with its center of curvature lies beyond O on the line AB
Answer» A point object O and its real, inverted and diminished image I formed by a concave mirror whose principal axis is AB as shown. The position of concave mirror should be (1) Right of O with its center of curvature lies between O and I on the line AB (2) Left of I with its center of curvature lies between O and I on the line AB (3) Right of O with its center of curvature lies beyond I on the line AB (4) Left of I with its center of curvature lies beyond O on the line AB

Discussion

50.	PQ (Double arrow ray) and PR (Single arrow ray) are two light rays emerging from the object P as shown in the figure below: Name the phenomenon that occurs if the angle of incidence (angle PQN) is increased still further.
Answer» PQ (Double arrow ray) and PR (Single arrow ray) are two light rays emerging from the object P as shown in the figure below: Name the phenomenon that occurs if the angle of incidence (angle PQN) is increased still further.

50.

PQ (Double arrow ray) and PR (Single arrow ray) are two light rays emerging from the object P as shown in the figure below: Name the phenomenon that occurs if the angle of incidence (angle PQN) is increased still further.

Answer»

PQ (Double arrow ray) and PR (Single arrow ray) are two light rays emerging from the object P as shown in the figure below:

Name the phenomenon that occurs if the angle of incidence (angle PQN) is increased still further.

Discussion

Explore topic-wise InterviewSolutions in .

Explain the sign convention for the spherical mirror.

The magnitude of the force acting on a current carrying wire placed in a magnetic field in the direction perpendicular to its length depends on ___.

COM OF ROD is at2L/3 then in problems why we take it at L/2

What is responsible for the release of nuclear energy?

what is relation between self induction in solenoid with number of turns

The magnitude of gravitational potential energy of the earth-satellite system is U with zero potential energy at infinite separation.The kinetic energy of satellite is K. Mass of satellite &lt;&lt; Mass of earth. Then

If in a plano-convex lens, radius of curvature of convex surface is 10 cm and the focal length of lens is 30 cm, the refractive index of the material of the lens will be

a. Identify the words in the advertisement that gave away the fact that it was placed by John Garrideb. b. Make a list of words which are spelt differently in American and British English.

Hypermetropia defect arises due to:

Green and red colours are allowed to fall on a white cricket ball simultaneously. What will be the colour of the ball?

The conductance of a 4.5 kilo ohm resistor is .

The difference between reflection of light from a plane mirror and total internal reflection of light from a prism is:

how Snell's law joins with the Refractive index,as Snell's law talk about angle and refractive index talk about the optical density.

6)The vapour density of PCI5 is 104.16,but when heated at 2300C, its vapour density is reduced to 62. Thepercentage of dissociation of PCI5 at this temperature will be:

If a resistance R2 is connected in parallel with the resistance R in the circuit shown, then possible value of current through R and the possible value of R2 will be

A beam of light travelling parallel to the principal axis of a concave lens appears to diverge from a point 25 cm behind the lens after refraction. Calculate the power of the lens.

In parallel combination, the total resistance of the circuit becomes ___the individual resistances.

The total number of tetrahedral voids in the face centred unit cell is _______.[1 Mark]

A boy lifts a 1 kg block by 1 m. The work done by the boy is: (g = 9.8 metre per second squared)

What is the difference between single unit smooth muscle and multi unit smooth muscle?

The light is incident from air to a medium of the refractive index 43. The Brewster's angle for this scenario will be

The focal length of a normal and relaxed eye lens is about -

18. What is electrolysis ?

Two closed organ pipes have length L and L+△ l resp. If velocity of sound in air is V, THEN the no of beats heard per second when the two organ pipes are vibrated together with thei respective fundamental mode is about (△ l

A charge 0.5 C passes through a cross section of a conductor in 5 s. Find the current.

If ∫cos5x dx=nC0⋅sinx−nC1⋅sin3x3+nC2⋅sin5x5+C, then the value of (2n+3)C2 is equal to(where C is integration constant)

Question 10Why do stars twinkle?

The network shown in the figure is a part of a complete circuit. If at a certain instant, the current i is 4 A and is increasing at a rate of 103 As−1. Then VB−VA will be-

Write an article of about 1000 words describing the stress-strain curve for a material. Explain in detail about young's modulus, proportional limit, yield point and fracture point along with the applications of the same.

the deflection produced in tangent galvanometer When a current of 1 A is passes through it and its plane is perpendicular to magnetic meridian, given (reduction factor k=1) (1)45^° (3) 90 (2) 60 (4) 0^°

electron deficien

The eyes of a person are focused (i) on a nearby object, and (ii) on a distant object, turn by turn. In which case : (a) the focal length of eye-lens will be the maximum ? (b) the converging power of eye-lens will be the maximum ?

The figure below shows stages in a nuclear fission reaction. The energies of these states are E1,E2 and E3 respectively. Which option is correct?

15. if a light of ray incidents normally on one of the faces of prism of refractive index 2 and emergent ray just gazes the second face of prism then the angle of deviation is?

Question 31(a) Locate and name the water reservoirs in figures given below.(b) Which has an advantage over the other and why?

What is armature

It 50 J of work must be done to move an electric charge of 2 C from a point where potential is −10 V to another point where potential is ′V′. The value of V is

Where should an object be placed in front of a convex lens to get a real image of the size of the object?(a) At the principal focus of the lens(b) At twice the focal length(c) At infinity(d) Between the optical centre of the lens and its principal focus.

37. If an electric bulb of 100 watt is lighted for 2 hours daily , how much electric energy would be consumed. Also find the cost if cost per unit is 2 rupees

a 10 A fuse wire is used in a mains line in a house .in anither house a 15 A fuse wire is used .the ratio of thier radii is

Explain with an experiment principle of Electromagnetic induction? Which law will gives the direction of electric current? [5 MARKS]

What happens when water is treated with Ca3P2

Why is an equitable distribution of resources essential in a society? List two forces which are against such distribution.

In Fleming’s right-hand rule:

Q. The length of a potentiometer wire is 15 m. An electron in this wire experiences a force of 4.8 \ast 10^{-19}N E.M.F. of new cell used in potentiometer is?

214 Why the magnetic field lines emerging from south direction of earth towards north direction as we all say the magnetic field lines emerging from north to south in the magnet.

PQ (Double arrow ray) and PR (Single arrow ray) are two light rays emerging from the object P as shown in the figure below: Name the phenomenon that occurs if the angle of incidence (angle PQN) is increased still further.

The magnitude of gravitational potential energy of the earth-satellite system is U with zero potential energy at infinite separation.The kinetic energy of satellite is K. Mass of satellite << Mass of earth. Then