16569 + Interview Questions in Physics

1.	The required Velocity Ratio(V.R) for a machine whose effort distance is 3 times that of load distance is ___ .
Answer» The required Velocity Ratio(V.R) for a machine whose effort distance is 3 times that of load distance is ___ .

Discussion

2.	A block of mass m is pulled horizontally on a smooth surface by a force of 2 N through a distance of 5 m. Find the work done in the process.
Answer» A block of mass m is pulled horizontally on a smooth surface by a force of $2 N$ through a distance of $5 m$ . Find the work done in the process.

2.

A block of mass m is pulled horizontally on a smooth surface by a force of 2 N through a distance of 5 m. Find the work done in the process.

Answer»

A block of mass m is pulled horizontally on a smooth surface by a force of $2 N$ through a distance of $5 m$ . Find the work done in the process.

Discussion

3.	The freezing point on a thermometer is marked as 20∘ and the boiling point at as 150∘. A temperature of 60∘C on this thermometer will be read as
Answer» The freezing point on a thermometer is marked as $20^{\circ}$ and the boiling point at as $150^{\circ}$ . A temperature of $60^{\circ}$ C on this thermometer will be read as

Discussion

4.	Which fuel can be considered as the most efficient based on the calorific value?
Answer» Which fuel can be considered as the most efficient based on the calorific value?

Discussion

5.	A dolphin echolocates its prey in 1.25 s. Assuming the prey is still, how long does it take for the dolphin to reach it, if it starts travelling at an average speed of 15 kmph? (Take the speed of sound in water to be 1400 m s−1)
Answer» A dolphin echolocates its prey in $1.25 s$ . Assuming the prey is still, how long does it take for the dolphin to reach it, if it starts travelling at an average speed of $15 kmph$ ? (Take the speed of sound in water to be $1400 m s^{- 1}$ )

Discussion

6.	A ray of light is incident on the plane surface of a transparent medium at an angle 60° with the normal. The angle of refraction is 30°. Calculate the refractive index of the transparent material. Give the equation of refractive index interms of real depth and apparent depth. [3 MARKS]
Answer» A ray of light is incident on the plane surface of a transparent medium at an angle 60° with the normal. The angle of refraction is 30°. Calculate the refractive index of the transparent material. Give the equation of refractive index interms of real depth and apparent depth. [3 MARKS]

Discussion

7.	Which of the following setup is the correct depiction, if AB is a current-carrying rod ?
Answer» Which of the following setup is the correct depiction, if AB is a current-carrying rod ?

Discussion

8.	What are magnetic field lines ? List two character properties of these lines.
Answer» What are magnetic field lines ? List two character properties of these lines.

Discussion

9.	The near point of a hypermetropic eye is 75 cm from the eye. What is the power of the lens required to read a book held at 25 cm from the eye?
Answer» The near point of a hypermetropic eye is 75 cm from the eye. What is the power of the lens required to read a book held at 25 cm from the eye?

Discussion

10.	What is meant by magnitude of a charge
Answer» What is meant by magnitude of a charge

Discussion

11.	The unit for expressing electric power is : (a) volt (b) joule (c) coulomb (d) watt
Answer» The unit for expressing electric power is : (a) volt (b) joule (c) coulomb (d) watt

11.

The unit for expressing electric power is : (a) volt (b) joule (c) coulomb (d) watt

Answer»

The unit for expressing electric power is :

(a) volt

(b) joule

(c) coulomb

(d) watt

Discussion

12.	The resistance of a conductor of length x is r. If its area of cross section is a,what is its resistivity?what is its unit?
Answer» The resistance of a conductor of length x is r. If its area of cross section is a,what is its resistivity?what is its unit?

Discussion

13.	What makes magnet behave as an attracting object
Answer» What makes magnet behave as an attracting object

Discussion

14.	the force supplied , to move electron in a circuit is called emf and the work done by per electron is called voltage. Am I right ?
Answer» the force supplied , to move electron in a circuit is called emf and the work done by per electron is called voltage. Am I right ?

Discussion

15.	What are the condition in which light will behave as a,wave particles or ray
Answer» What are the condition in which light will behave as a,wave particles or ray

Discussion

16.	Why does a current carrying conductor experiences a force when placed in a region of magnetic field?
Answer» Why does a current carrying conductor experiences a force when placed in a region of magnetic field?

Discussion

17.	A metal drill of power 40 W, drills a hole in a lead cube of mass 1 kg in 8.5 seconds. The specific heat capacity of lead is 130 Jkg–1°C–1. If all the mechanical energy of the drill changes into heat energy, calculate the rise in temperature of lead cube.
Answer» A metal drill of power 40 W, drills a hole in a lead cube of mass 1 kg in 8.5 seconds. The specific heat capacity of lead is 130 Jkg^–1°C^–1. If all the mechanical energy of the drill changes into heat energy, calculate the rise in temperature of lead cube.

Discussion

18.	I attached the voltmeter in series and found ammeter reading is always showing zero how will you explain that
Answer» I attached the voltmeter in series and found ammeter reading is always showing zero how will you explain that

Discussion

19.	If A=⎡⎣1tanθ2−tanθ21⎤⎦ and AB = I, then B =
Answer» If $A = ⎡ ⎣ \begin{matrix} 1 & t a n \frac{θ}{2} - t a n \frac{θ}{2} & 1 \end{matrix} ⎤ ⎦$ and AB = I, then B =

Discussion

20.	The image formed by a plane mirror is : (a) virtual, behind the mirror and enlarged. (b) virtual, behind the mirror and of the same size as the object. (c) real, at the surface of the mirror and enlarged. (d) real, behind the mirror and of the same size as the object.
Answer» The image formed by a plane mirror is : (a) virtual, behind the mirror and enlarged. (b) virtual, behind the mirror and of the same size as the object. (c) real, at the surface of the mirror and enlarged. (d) real, behind the mirror and of the same size as the object.

20.

The image formed by a plane mirror is : (a) virtual, behind the mirror and enlarged. (b) virtual, behind the mirror and of the same size as the object. (c) real, at the surface of the mirror and enlarged. (d) real, behind the mirror and of the same size as the object.

Answer»

The image formed by a plane mirror is :

(a) virtual, behind the mirror and enlarged.

(b) virtual, behind the mirror and of the same size as the object.

(c) real, at the surface of the mirror and enlarged.

(d) real, behind the mirror and of the same size as the object.

Discussion

21.	The wavelength range of the visible spectrum extends from violet (400 nm) to red (750 nm). Express these wavelength in frequencies (Hz). (1 nm = 10−9 m).
Answer» The wavelength range of the visible spectrum extends from violet (400 nm) to red (750 nm). Express these wavelength in frequencies (Hz). $(1 n m = 10^{- 9} m)$ .

Discussion

22.	What is myopia. State the two causes of myopia? With the help of labelled ray diagram show (i) Eye defect (ii) Correction of myopia
Answer» What is myopia. State the two causes of myopia? With the help of labelled ray diagram show (i) Eye defect (ii) Correction of myopia

22.

What is myopia. State the two causes of myopia? With the help of labelled ray diagram show (i) Eye defect (ii) Correction of myopia

Answer»

What is myopia. State the two causes of myopia? With the help of labelled ray diagram show

(i) Eye defect

(ii) Correction of myopia

Discussion

23.	(a) What happens to the size of pupil of our eye (i) in dim light (ii) in bright light ? (b) Name the cells on the retina of an eye which are sensitive to (i) bright light (ii) dim light (iii) sensation of colour.
Answer» (a) What happens to the size of pupil of our eye (i) in dim light (ii) in bright light ? (b) Name the cells on the retina of an eye which are sensitive to (i) bright light (ii) dim light (iii) sensation of colour.

Discussion

24.	A ray of light strikes the surface of a rectangular glass block such that the angle of incidence is 0°, the path taken by the ray in each case as it passes through the glass block and emerges from it is such that
Answer» A ray of light strikes the surface of a rectangular glass block such that the angle of incidence is 0°, the path taken by the ray in each case as it passes through the glass block and emerges from it is such that

Discussion

25.	State whether the following statements are 'true' or 'false' by writing T/F against them. (a) A convex lens has a divergent action and a concave lens has a convergent action. (b) A concave lens, if kept at a proper distance from an object, can form its real image. (c) A ray of light incident parallel to the principal axis of a lens, passes undeviated after refraction. (d) A ray of light incident at the optical centre of lens, passes undeviated after refraction. (e) A concave lens forms a magnified or diminished image depending on the distance of object from it.
Answer» State whether the following statements are 'true' or 'false' by writing T/F against them. (a) A convex lens has a divergent action and a concave lens has a convergent action. (b) A concave lens, if kept at a proper distance from an object, can form its real image. (c) A ray of light incident parallel to the principal axis of a lens, passes undeviated after refraction. (d) A ray of light incident at the optical centre of lens, passes undeviated after refraction. (e) A concave lens forms a magnified or diminished image depending on the distance of object from it.

25.

State whether the following statements are 'true' or 'false' by writing T/F against them. (a) A convex lens has a divergent action and a concave lens has a convergent action. (b) A concave lens, if kept at a proper distance from an object, can form its real image. (c) A ray of light incident parallel to the principal axis of a lens, passes undeviated after refraction. (d) A ray of light incident at the optical centre of lens, passes undeviated after refraction. (e) A concave lens forms a magnified or diminished image depending on the distance of object from it.

Answer»

State whether the following statements are 'true' or 'false' by writing T/F against them.

(a) A convex lens has a divergent action and a concave lens has a convergent action.

(b) A concave lens, if kept at a proper distance from an object, can form its real image.

(c) A ray of light incident parallel to the principal axis of a lens, passes undeviated after refraction.

(d) A ray of light incident at the optical centre of lens, passes undeviated after refraction.

(e) A concave lens forms a magnified or diminished image depending on the distance of object from it.

Discussion

26.	What are the environmental consequences of the increasing demand for energy ?
Answer» What are the environmental consequences of the increasing demand for energy ?

Discussion

27.	When a concave mirror is placed facing the sun, the sun rays converge to a point 15 cm from the mirror. Now, an erect, 2 cm long pin is placed 30 cm away on the principal axis of the mirror. Where should a card be placed so that the image of the pin can be taken on the card and what would be the nature and the height of the image?
Answer» When a concave mirror is placed facing the sun, the sun rays converge to a point 15 cm from the mirror. Now, an erect, 2 cm long pin is placed 30 cm away on the principal axis of the mirror. Where should a card be placed so that the image of the pin can be taken on the card and what would be the nature and the height of the image?

Discussion

28.	Compare two quantities — Quantity A and Quantity B — and then determine which of the following statement describes the comparison: In a lens, if u - distance of the object from the lens v - distance of the image from the lens hi - height of the image h - height of the object
Answer» Compare two quantities — Quantity A and Quantity B — and then determine which of the following statement describes the comparison: In a lens, if u - distance of the object from the lens v - distance of the image from the lens $h^{i}$ - height of the image h - height of the object

Discussion

29.	Find the size , nature and position of image formed when an object of size 1 cm is placed at a distance of 15 cm from a concave mirror of focal length 10 cm
Answer» Find the size , nature and position of image formed when an object of size 1 cm is placed at a distance of 15 cm from a concave mirror of focal length 10 cm

Discussion

30.	Is silver a good conductor of electricty than copper or aluminium and if YES then why??
Answer» Is silver a good conductor of electricty than copper or aluminium and if YES then why??

Discussion

31.	What type of image /images are formed by : (a) a convex mirror ? (b) a concave mirror ?
Answer» What type of image /images are formed by : (a) a convex mirror ? (b) a concave mirror ?

Discussion

32.	During a jump from the aeroplane at a particular velocity, the air drag on parachute becomes:
Answer» During a jump from the aeroplane at a particular velocity, the air drag on parachute becomes:

Discussion

33.	A convex lens of focal length 6 cm is held 4 cm from a newspaper which has print 0.5 cm high. By calculation, determine the size and nature of the image produced.
Answer» A convex lens of focal length 6 cm is held 4 cm from a newspaper which has print 0.5 cm high. By calculation, determine the size and nature of the image produced.

Discussion

34.	Difference between slip ring and split ring in terms of its function
Answer» Difference between slip ring and split ring in terms of its function

Discussion

35.	The tricolor flag designed during the Swadeshi movement in Bengal had which three colours?
Answer» The tricolor flag designed during the Swadeshi movement in Bengal had which three colours?

Discussion

36.	Two birds of exactly same mass are kept in two cages A and B. Cage A is made of glass and cage B is made of wire net. Both cages are kept on a weighting machine . While the birds are sitting on a bar fitted inside the cage the reading of the weighting machine is noted. If the birds now start flying and hovering in air in their cages , how do the readings in the weighting machine change.
Answer» Two birds of exactly same mass are kept in two cages A and B. Cage A is made of glass and cage B is made of wire net. Both cages are kept on a weighting machine . While the birds are sitting on a bar fitted inside the cage the reading of the weighting machine is noted. If the birds now start flying and hovering in air in their cages , how do the readings in the weighting machine change.

Discussion

37.	What is resistance?
Answer» What is resistance?

Discussion

38.	Magnitude of torque is maximum in the following case
Answer» Magnitude of torque is maximum in the following case

Discussion

39.	What is refractive index?
Answer» What is refractive index?

Discussion

40.	Find the equivalent resistance between the points A and B.
Answer» Find the equivalent resistance between the points $A$ and $B$ .

Discussion

41.	the 3rd chapter of kerala state syllabys "electromagnetic induction" says mainly about AC current. What is the state or difference of the current when the EMF of single phase generator hits its maximum in negative (characterstics of current)
Answer» the 3rd chapter of kerala state syllabys "electromagnetic induction" says mainly about AC current. What is the state or difference of the current when the EMF of single phase generator hits its maximum in negative (characterstics of current)

Discussion

42.	Does magnetic induction occur with AC current even if there is no motion between magnet and coil?
Answer» Does magnetic induction occur with AC current even if there is no motion between magnet and coil?

Discussion

43.	Which of the following produces more heat (per unit mass) on burning? Coal or LPG
Answer» Which of the following produces more heat (per unit mass) on burning? Coal or LPG

Discussion

44.	Difference between kilowatt and kilowatt hour
Answer» Difference between kilowatt and kilowatt hour

Discussion

45.	The SI unit of radioactivity is ______.
Answer» The SI unit of radioactivity is ______.

Discussion

46.	What is the steam point of water?
Answer» What is the steam point of water?

Discussion

47.	When do we put the resistance in series combination
Answer» When do we put the resistance in series combination

Discussion

48.	What is a renewable resource?
Answer» What is a renewable resource?

Discussion

49.	a current I is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and in the plane of the loop. If a steady current I is established in the wire, what will happen to the loop?
Answer» a current I is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and in the plane of the loop. If a steady current I is established in the wire, what will happen to the loop?

Discussion

50.	Q13. Consider the following statements about Electricity Act, 2003: 1. Creation of an open market for electricity. 2. In an open market, anyone could produce power anywhere and sell it to anyone else at mutually agreed prices. Which of the statements are correct?
Answer» Q13. Consider the following statements about Electricity Act, 2003: 1. Creation of an open market for electricity. 2. In an open market, anyone could produce power anywhere and sell it to anyone else at mutually agreed prices. Which of the statements are correct?

50.

Q13. Consider the following statements about Electricity Act, 2003: 1. Creation of an open market for electricity. 2. In an open market, anyone could produce power anywhere and sell it to anyone else at mutually agreed prices. Which of the statements are correct?

Answer»

Q13. Consider the following statements about Electricity Act, 2003:

1. Creation of an open market for electricity.

2. In an open market, anyone could produce power anywhere and sell it to anyone else at mutually agreed prices.

Which of the statements are correct?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The required Velocity Ratio(V.R) for a machine whose effort distance is 3 times that of load distance is ___ .

A block of mass m is pulled horizontally on a smooth surface by a force of 2 N through a distance of 5 m. Find the work done in the process.

The freezing point on a thermometer is marked as 20∘ and the boiling point at as 150∘. A temperature of 60∘C on this thermometer will be read as

Which fuel can be considered as the most efficient based on the calorific value?

A dolphin echolocates its prey in 1.25 s. Assuming the prey is still, how long does it take for the dolphin to reach it, if it starts travelling at an average speed of 15 kmph? (Take the speed of sound in water to be 1400 m s−1)

A ray of light is incident on the plane surface of a transparent medium at an angle 60° with the normal. The angle of refraction is 30°. Calculate the refractive index of the transparent material. Give the equation of refractive index interms of real depth and apparent depth. [3 MARKS]

Which of the following setup is the correct depiction, if AB is a current-carrying rod ?

What are magnetic field lines ? List two character properties of these lines.

The near point of a hypermetropic eye is 75 cm from the eye. What is the power of the lens required to read a book held at 25 cm from the eye?

What is meant by magnitude of a charge

The unit for expressing electric power is : (a) volt (b) joule (c) coulomb (d) watt

The resistance of a conductor of length x is r. If its area of cross section is a,what is its resistivity?what is its unit?

What makes magnet behave as an attracting object

the force supplied , to move electron in a circuit is called emf and the work done by per electron is called voltage. Am I right ?

What are the condition in which light will behave as a,wave particles or ray

Why does a current carrying conductor experiences a force when placed in a region of magnetic field?

A metal drill of power 40 W, drills a hole in a lead cube of mass 1 kg in 8.5 seconds. The specific heat capacity of lead is 130 Jkg–1°C–1. If all the mechanical energy of the drill changes into heat energy, calculate the rise in temperature of lead cube.

I attached the voltmeter in series and found ammeter reading is always showing zero how will you explain that

If A=⎡⎣1tanθ2−tanθ21⎤⎦ and AB = I, then B =

The image formed by a plane mirror is : (a) virtual, behind the mirror and enlarged. (b) virtual, behind the mirror and of the same size as the object. (c) real, at the surface of the mirror and enlarged. (d) real, behind the mirror and of the same size as the object.

The wavelength range of the visible spectrum extends from violet (400 nm) to red (750 nm). Express these wavelength in frequencies (Hz). (1 nm = 10−9 m).

What is myopia. State the two causes of myopia? With the help of labelled ray diagram show (i) Eye defect (ii) Correction of myopia

(a) What happens to the size of pupil of our eye (i) in dim light (ii) in bright light ? (b) Name the cells on the retina of an eye which are sensitive to (i) bright light (ii) dim light (iii) sensation of colour.

A ray of light strikes the surface of a rectangular glass block such that the angle of incidence is 0°, the path taken by the ray in each case as it passes through the glass block and emerges from it is such that

What are the environmental consequences of the increasing demand for energy ?

Compare two quantities — Quantity A and Quantity B — and then determine which of the following statement describes the comparison: In a lens, if u - distance of the object from the lens v - distance of the image from the lens hi - height of the image h - height of the object

Find the size , nature and position of image formed when an object of size 1 cm is placed at a distance of 15 cm from a concave mirror of focal length 10 cm

Is silver a good conductor of electricty than copper or aluminium and if YES then why??

What type of image /images are formed by : (a) a convex mirror ? (b) a concave mirror ?

During a jump from the aeroplane at a particular velocity, the air drag on parachute becomes:

A convex lens of focal length 6 cm is held 4 cm from a newspaper which has print 0.5 cm high. By calculation, determine the size and nature of the image produced.

Difference between slip ring and split ring in terms of its function

The tricolor flag designed during the Swadeshi movement in Bengal had which three colours?

What is resistance?

Magnitude of torque is maximum in the following case

What is refractive index?

Find the equivalent resistance between the points A and B.

the 3rd chapter of kerala state syllabys "electromagnetic induction" says mainly about AC current. What is the state or difference of the current when the EMF of single phase generator hits its maximum in negative (characterstics of current)

Does magnetic induction occur with AC current even if there is no motion between magnet and coil?

Which of the following produces more heat (per unit mass) on burning? Coal or LPG

Difference between kilowatt and kilowatt hour

The SI unit of radioactivity is ______.

What is the steam point of water?

When do we put the resistance in series combination

What is a renewable resource?

a current I is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and in the plane of the loop. If a steady current I is established in the wire, what will happen to the loop?

Q13. Consider the following statements about Electricity Act, 2003: 1. Creation of an open market for electricity. 2. In an open market, anyone could produce power anywhere and sell it to anyone else at mutually agreed prices. Which of the statements are correct?