16569 + Interview Questions in Physics

1.	A vessel of negligible heat capacity contains 40 g of ice in it at 00C. A metal of mass 50 g at 500C is placed into the ice to melt it. The final temperature of the contents of the vessel is 100C. Find the specific capacity of the metal. (Specific latent heat of fusion of ice = 336 J/g and Specific heat capacity of water = 4.2 J/g0C)
Answer» A vessel of negligible heat capacity contains 40 g of ice in it at 0⁰C. A metal of mass 50 g at 50⁰C is placed into the ice to melt it. The final temperature of the contents of the vessel is 10⁰C. Find the specific capacity of the metal. (Specific latent heat of fusion of ice = 336 J/g and Specific heat capacity of water = 4.2 J/g⁰C)

1.

A vessel of negligible heat capacity contains 40 g of ice in it at 00C. A metal of mass 50 g at 500C is placed into the ice to melt it. The final temperature of the contents of the vessel is 100C. Find the specific capacity of the metal. (Specific latent heat of fusion of ice = 336 J/g and Specific heat capacity of water = 4.2 J/g0C)

Answer»

A vessel of negligible heat capacity contains 40 g of ice in it at 0⁰C. A metal of mass 50 g at 50⁰C is placed into the ice to melt it. The final temperature of the contents of the vessel is 10⁰C. Find the specific capacity of the metal.

(Specific latent heat of fusion of ice = 336 J/g and Specific heat capacity of water = 4.2 J/g⁰C)

Discussion

2.	How to find the refractive index of one medium in respect to the other medium
Answer» How to find the refractive index of one medium in respect to the other medium

Discussion

3.	How can we find the direction of magnetic field in a circular loop?
Answer» How can we find the direction of magnetic field in a circular loop?

Discussion

4.	The direction of rotation of a DC motor, as shown below, is in the clockwise direction.What is direction of the magnetic field?
Answer» The direction of rotation of a DC motor, as shown below, is in the clockwise direction. What is direction of the magnetic field?

Discussion

5.	The gravitational force between two objects is F. If masses of both the objects are halved without altering the distance between them, then the gravitational force would become:
Answer» The gravitational force between two objects is F. If masses of both the objects are halved without altering the distance between them, then the gravitational force would become:

Discussion

6.	What are the differences between electrovalency ,covalency and valency?
Answer» What are the differences between electrovalency ,covalency and valency?

Discussion

7.	. The current through a wire depends on time as i = 10 + 10t +30t2. The charge crossed through a section of the wire in 10 s will be
Answer» . The current through a wire depends on time as i = 10 + 10t +30t2. The charge crossed through a section of the wire in 10 s will be

Discussion

8.	An object is placed at 25 cm in front of a convex lens. Its image is formed at 50 cm from the lens on the same side as the object. Find the power of the lens.
Answer» An object is placed at $25 c m$ in front of a convex lens. Its image is formed at $50 c m$ from the lens on the same side as the object. Find the power of the lens.

Discussion

9.	Explain this diagram [3 MARKS]
Answer» Explain this diagram [3 MARKS]

9.

Explain this diagram [3 MARKS]

Answer»

Explain this diagram [3 MARKS]

Discussion

10.	A biconvex thin lens is prepared from glass of refractive index 32. The two bounding surfaces have equal radii of 25 cm each. One of the surface is silvered from outside to make it reflecting. Where should an object be placed before this lens so that the image coincides with the object ?
Answer» A biconvex thin lens is prepared from glass of refractive index $\frac{3}{2}$ . The two bounding surfaces have equal radii of $25 cm$ each. One of the surface is silvered from outside to make it reflecting. Where should an object be placed before this lens so that the image coincides with the object ?

Discussion

11.	It is said that bar magnet is equivalent to solenoid Even then in a solenoid B is max inside and min at ends but in bar magnet the situation is just opposite Explain this completely and with help of formula
Answer» It is said that bar magnet is equivalent to solenoid Even then in a solenoid B is max inside and min at ends but in bar magnet the situation is just opposite Explain this completely and with help of formula

Discussion

12.	For the circuit shown below, calculate the value of IZ.
Answer» For the circuit shown below, calculate the value of $I_{Z}$ .

Discussion

13.	Refractive indices of water, sulphuric acid, glass and carbon disulphide are 1.33, 1.43, 1.53 and 1.63 respectively. The light travels slowest in : (a) sulphuric acid (b) glass (c) water (d) carbon disulphide
Answer» Refractive indices of water, sulphuric acid, glass and carbon disulphide are 1.33, 1.43, 1.53 and 1.63 respectively. The light travels slowest in : (a) sulphuric acid (b) glass (c) water (d) carbon disulphide

Discussion

14.	5. An under water swimmer is at a depth of 12 m below thesurface of water. A bird is at a height of 18 m from thesurface of water, directly above his eyes. For the swimmerthe bird appears to be at a distance from the surface ofwater equal to (Refractive Index of water is )43\lbrack KCET (Engg.) 2001\rbrack(a) 24 m(c) 18 m(b) 12 m(d) 9 m
Answer» 5. An under water swimmer is at a depth of 12 m below thesurface of water. A bird is at a height of 18 m from thesurface of water, directly above his eyes. For the swimmerthe bird appears to be at a distance from the surface ofwater equal to (Refractive Index of water is )43\lbrack KCET (Engg.) 2001\rbrack(a) 24 m(c) 18 m(b) 12 m(d) 9 m

Discussion

15.	A double concave thin lens made out of glass (μ=1.5) have radii ofcurvature 500cm.This lens is used to rectify the defect in vision of a person.The far point of the person will be?
Answer» A double concave thin lens made out of glass (μ=1.5) have radii ofcurvature 500cm.This lens is used to rectify the defect in vision of a person.The far point of the person will be?

Discussion

16.	An object is placed at a distance of 15 cm froma convex lens of focal length 10 cm. On the other side of the lens, a convex mirror is placed at a distance of 10 cm from the lens such thatthe image formed by the combination coincideswith the object itself. The focal length of theconvex mirror iS(1) 20 cm (2) 10 cm (3) 15 cm (4) 30 cm
Answer» An object is placed at a distance of 15 cm froma convex lens of focal length 10 cm. On the other side of the lens, a convex mirror is placed at a distance of 10 cm from the lens such thatthe image formed by the combination coincideswith the object itself. The focal length of theconvex mirror iS(1) 20 cm (2) 10 cm (3) 15 cm (4) 30 cm

Discussion

17.	In the circuit shown below, if ammeter read 1 A, then the value of unknown resistance X is
Answer» In the circuit shown below, if ammeter read $1 A$ , then the value of unknown resistance $X$ is

Discussion

18.	draw a curve showing thw variation in angle of deviation with the angla of incidence at a prism surface
Answer» draw a curve showing thw variation in angle of deviation with the angla of incidence at a prism surface

Discussion

19.	a square loop of side 22cm is changed to a cirrcle in time 0.4sec. the magnetuc field present is 0.2T.the emf induced i
Answer» a square loop of side 22cm is changed to a cirrcle in time 0.4sec. the magnetuc field present is 0.2T.the emf induced i

Discussion

20.	coulombs law is ana\log ous to newtons law of gravitation.why?
Answer» coulombs law is ana\log ous to newtons law of gravitation.why?

Discussion

21.	Question 33Prepare a list of five activities that you perform daily in which natural resources can be conserved or energy utilization can be minimized.
Answer» Question 33 Prepare a list of five activities that you perform daily in which natural resources can be conserved or energy utilization can be minimized.

Discussion

22.	Question 5How is a voltmeter connected in the circuit to measure the potential difference between two points?
Answer» Question 5 How is a voltmeter connected in the circuit to measure the potential difference between two points?

Discussion

23.	A body of weight 10 kg is hanged by a spring of spring constant 20 N/m . Same spring is cut into two pieces of length ratio 1:3. Shorter part is now used to hang same block. Now, what will be x at equilibrium?
Answer» A body of weight 10 kg is hanged by a spring of spring constant 20 N/m . Same spring is cut into two pieces of length ratio 1:3. Shorter part is now used to hang same block. Now, what will be x at equilibrium?

Discussion

24.	89.Kindly derive the efficiency for full wave and half wave rectifiers.
Answer» 89.Kindly derive the efficiency for full wave and half wave rectifiers.

Discussion

25.	How is persistence of vision make its use in cinematography? Explain briefly.
Answer» How is persistence of vision make its use in cinematography? Explain briefly.

Discussion

26.	The focal power of a lens has the dimensions
Answer» The focal power of a lens has the dimensions

Discussion

27.	Force exerted on a body will necessarily change its
Answer» Force exerted on a body will necessarily change its

Discussion

28.	Mark the correct answer in the following questions.A. What is the reason for the twinkling of stars?i . Explosions occurring in stars from time to timeii. Absorption of light in the earth’s atmosphereiii. Motion of starsiv. Changing refractive index of the atmospheric gasesB. We can see the Sun even when it is little below the horizon because ofi. Reflection of lightii. Refraction of lightiii. Dispersion of lightiv. Absorption of lightC. If the refractive index of glass with respect to air is 3/2, what is the refractive index of air with respect to glass?a. 12 b. 3c. 13 d. 23
Answer» Mark the correct answer in the following questions. A. What is the reason for the twinkling of stars? i . Explosions occurring in stars from time to time ii. Absorption of light in the earth’s atmosphere iii. Motion of stars iv. Changing refractive index of the atmospheric gases B. We can see the Sun even when it is little below the horizon because of i. Reflection of light ii. Refraction of light iii. Dispersion of light iv. Absorption of light C. If the refractive index of glass with respect to air is 3/2, what is the refractive index of air with respect to glass? a. $\frac{1}{2}$ b. 3 c. $\frac{1}{3}$ d. $\frac{2}{3}$

Discussion

29.	Does Electromagnetic Force/ Coulomb's Law defines the attraction between a charged and uncharged particle / body? Or It is limited for charged particles only.
Answer» Does Electromagnetic Force/ Coulomb's Law defines the attraction between a charged and uncharged particle / body? Or It is limited for charged particles only.

Discussion

30.	(a) Given nresistors each of resistance R,how will you combine them to get the (i) maximum (ii) minimumeffective resistance? What is the ratio of the maximum to minimumresistance?(b) Given the resistances of 1 Ω,2 Ω, 3 Ω,how will be combine them to get an equivalent resistance of (i)(11/3) Ω (ii)(11/5) Ω, (iii) 6 Ω,(iv) (6/11) Ω?(c) Determinethe equivalent resistance of networks shown in Fig. 3.31.
Answer» (a) Given n resistors each of resistance R, how will you combine them to get the (i) maximum (ii) minimum effective resistance? What is the ratio of the maximum to minimum resistance? (b) Given the resistances of 1 Ω, 2 Ω, 3 Ω, how will be combine them to get an equivalent resistance of (i) (11/3) Ω (ii) (11/5) Ω, (iii) 6 Ω, (iv) (6/11) Ω? (c) Determine the equivalent resistance of networks shown in Fig. 3.31.

30.

(a) Given nresistors each of resistance R,how will you combine them to get the (i) maximum (ii) minimumeffective resistance? What is the ratio of the maximum to minimumresistance?(b) Given the resistances of 1 Ω,2 Ω, 3 Ω,how will be combine them to get an equivalent resistance of (i)(11/3) Ω (ii)(11/5) Ω, (iii) 6 Ω,(iv) (6/11) Ω?(c) Determinethe equivalent resistance of networks shown in Fig. 3.31.

Answer»

(a) Given n
resistors each of resistance R,
how will you combine them to get the (i) maximum (ii) minimum
effective resistance? What is the ratio of the maximum to minimum
resistance?

(b) Given the resistances of 1 Ω,
2 Ω, 3 Ω,
how will be combine them to get an equivalent resistance of (i)
(11/3) Ω (ii)
(11/5) Ω, (iii) 6 Ω,
(iv) (6/11) Ω?

(c) Determine
the equivalent resistance of networks shown in Fig. 3.31.

Discussion

31.	Suppose the gravitational force varies inversely as the nth power of distance. Then the time period of a planet in a circular orbit of radius R around the sun will be proportional to
Answer» Suppose the gravitational force varies inversely as the $n^{t h}$ power of distance. Then the time period of a planet in a circular orbit of radius $R$ around the sun will be proportional to

Discussion

32.	lon has a uniform field of influence around it,Kindly explain this statement
Answer» lon has a uniform field of influence around it,Kindly explain this statement

Discussion

33.	Sir/Ma'am, The question asked by you in equations of motion the answer ellaborated gives an equation (D/5)to the power 1/2 + D/340=6.53 Kindly please guide me how to solve the equation furture i.e., how will I remove the root. Sir give further solution. It is becoming difficult for me
Answer» Sir/Ma'am, The question asked by you in equations of motion the answer ellaborated gives an equation (D/5)to the power 1/2 + D/340=6.53 Kindly please guide me how to solve the equation furture i.e., how will I remove the root. Sir give further solution. It is becoming difficult for me

33.

Sir/Ma'am, The question asked by you in equations of motion the answer ellaborated gives an equation (D/5)to the power 1/2 + D/340=6.53 Kindly please guide me how to solve the equation furture i.e., how will I remove the root. Sir give further solution. It is becoming difficult for me

Answer»

Sir/Ma'am,

The question asked by you in equations of motion the answer ellaborated gives an equation (D/5)to the power 1/2 + D/340=6.53

Kindly please guide me how to solve the equation furture i.e., how will I remove the root.

Sir give further solution. It is becoming difficult for me

Discussion

34.	The characteristic of sound which enables a person to differentiate between two sounds with equal loudness but having different frequencies is
Answer» The characteristic of sound which enables a person to differentiate between two sounds with equal loudness but having different frequencies is

Discussion

35.	Which of the following is not a renewable energy?
Answer» Which of the following is not a renewable energy?

Discussion

36.	The quantity of matter in a body regardless of its volume or any force acting on it is called its ________.
Answer» The quantity of matter in a body regardless of its volume or any force acting on it is called its ________.

Discussion

37.	The magnifying power of the objective lens of a compound microscope is 7. If the magnifying power of the compound microscope is 35, then the magnifying power of the eyepiece will be -
Answer» The magnifying power of the objective lens of a compound microscope is $7$ . If the magnifying power of the compound microscope is $35$ , then the magnifying power of the eyepiece will be -

Discussion

38.	When light enters water from air, what change is observed in its speed?
Answer» When light enters water from air, what change is observed in its speed?

Discussion

39.	Prove that Refractie index=real depth /apparent depth
Answer» Prove that Refractie index=real depth /apparent depth

Discussion

40.	Consider a long current carrying cylindrical conductor of radius r.current density J inside the conductor is uniform over its cross section.deduce the suitable expression for force of interaction per unit length between two halves that are obtained by dividing the conductor by a plane containing the axis of the conductor.
Answer» Consider a long current carrying cylindrical conductor of radius r.current density J inside the conductor is uniform over its cross section.deduce the suitable expression for force of interaction per unit length between two halves that are obtained by dividing the conductor by a plane containing the axis of the conductor.

Discussion

41.	How force is inward for current carrying 2 parallel wires
Answer» How force is inward for current carrying 2 parallel wires

Discussion

42.	there are three sources of sound of equal intensities with freq. 200,201,202 Hz resp. if all sounded simultaneously the beat freq heard by listener?
Answer» there are three sources of sound of equal intensities with freq. 200,201,202 Hz resp. if all sounded simultaneously the beat freq heard by listener?

Discussion

43.	For a constant resistance, the correct relation between heat produced (H) and electric current (I) flowing is:
Answer» For a constant resistance, the correct relation between heat produced ( $H$ ) and electric current ( $I$ ) flowing is:

Discussion

44.	9. A cubical vessel of height 1 m is full of water. The minimum work done in taking water-out from vessel will be (1)5000j(2) 10000j(3) 5j (4) 10
Answer» 9. A cubical vessel of height 1 m is full of water. The minimum work done in taking water-out from vessel will be (1)5000j(2) 10000j(3) 5j (4) 10

Discussion

45.	A man consumes glucose and then he moves a block which then comes to rest after sliding on a rough floor. The correct order of energy changes can be
Answer» A man consumes glucose and then he moves a block which then comes to rest after sliding on a rough floor. The correct order of energy changes can be

Discussion

46.	Write True/False against the following statements and also correct the false statement.(a) A physical process in which a substance reacts with oxygen to give off heat is called combustion.(b) Water is the best extinguisher for fires involving electrical equipment.(c) Alcohol, CNG, and LPG are inflammable substances.(d) Increase concentration of nitrogen in the air is believed to cause global warming.(e) Greater the calorific value, the better the fuel.(f) Middle zone is the hottest zone of a flame.(g) The substances which vapourize during burning, give flame.
Answer» Write True/False against the following statements and also correct the false statement. (a) A physical process in which a substance reacts with oxygen to give off heat is called combustion. (b) Water is the best extinguisher for fires involving electrical equipment. (c) Alcohol, CNG, and LPG are inflammable substances. (d) Increase concentration of nitrogen in the air is believed to cause global warming. (e) Greater the calorific value, the better the fuel. (f) Middle zone is the hottest zone of a flame. (g) The substances which vapourize during burning, give flame.

Discussion

47.	What is the meaning of angular momentum in simple words?
Answer» What is the meaning of angular momentum in simple words?

Discussion

48.	What is nuclear fission reaction
Answer» What is nuclear fission reaction

Discussion

49.	The possibility of overloading occurs when___.
Answer» The possibility of overloading occurs when___.

Discussion

50.	Which has larger frequency – infrasonic sound or ultrasonic sound?
Answer» Which has larger frequency – infrasonic sound or ultrasonic sound?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

How to find the refractive index of one medium in respect to the other medium

How can we find the direction of magnetic field in a circular loop?

The direction of rotation of a DC motor, as shown below, is in the clockwise direction.What is direction of the magnetic field?

The gravitational force between two objects is F. If masses of both the objects are halved without altering the distance between them, then the gravitational force would become:

What are the differences between electrovalency ,covalency and valency?

. The current through a wire depends on time as i = 10 + 10t +30t2. The charge crossed through a section of the wire in 10 s will be

An object is placed at 25 cm in front of a convex lens. Its image is formed at 50 cm from the lens on the same side as the object. Find the power of the lens.

Explain this diagram [3 MARKS]

A biconvex thin lens is prepared from glass of refractive index 32. The two bounding surfaces have equal radii of 25 cm each. One of the surface is silvered from outside to make it reflecting. Where should an object be placed before this lens so that the image coincides with the object ?

It is said that bar magnet is equivalent to solenoid Even then in a solenoid B is max inside and min at ends but in bar magnet the situation is just opposite Explain this completely and with help of formula

For the circuit shown below, calculate the value of IZ.

Refractive indices of water, sulphuric acid, glass and carbon disulphide are 1.33, 1.43, 1.53 and 1.63 respectively. The light travels slowest in : (a) sulphuric acid (b) glass (c) water (d) carbon disulphide

A double concave thin lens made out of glass (μ=1.5) have radii ofcurvature 500cm.This lens is used to rectify the defect in vision of a person.The far point of the person will be?

In the circuit shown below, if ammeter read 1 A, then the value of unknown resistance X is

draw a curve showing thw variation in angle of deviation with the angla of incidence at a prism surface

a square loop of side 22cm is changed to a cirrcle in time 0.4sec. the magnetuc field present is 0.2T.the emf induced i

coulombs law is ana\log ous to newtons law of gravitation.why?

Question 33Prepare a list of five activities that you perform daily in which natural resources can be conserved or energy utilization can be minimized.

Question 5How is a voltmeter connected in the circuit to measure the potential difference between two points?

A body of weight 10 kg is hanged by a spring of spring constant 20 N/m . Same spring is cut into two pieces of length ratio 1:3. Shorter part is now used to hang same block. Now, what will be x at equilibrium?

89.Kindly derive the efficiency for full wave and half wave rectifiers.

How is persistence of vision make its use in cinematography? Explain briefly.

The focal power of a lens has the dimensions

Force exerted on a body will necessarily change its

Does Electromagnetic Force/ Coulomb's Law defines the attraction between a charged and uncharged particle / body? Or It is limited for charged particles only.

Suppose the gravitational force varies inversely as the nth power of distance. Then the time period of a planet in a circular orbit of radius R around the sun will be proportional to

lon has a uniform field of influence around it,Kindly explain this statement

Sir/Ma'am, The question asked by you in equations of motion the answer ellaborated gives an equation (D/5)to the power 1/2 + D/340=6.53 Kindly please guide me how to solve the equation furture i.e., how will I remove the root. Sir give further solution. It is becoming difficult for me

The characteristic of sound which enables a person to differentiate between two sounds with equal loudness but having different frequencies is

Which of the following is not a renewable energy?

The quantity of matter in a body regardless of its volume or any force acting on it is called its ________.

The magnifying power of the objective lens of a compound microscope is 7. If the magnifying power of the compound microscope is 35, then the magnifying power of the eyepiece will be -

When light enters water from air, what change is observed in its speed?

Prove that Refractie index=real depth /apparent depth

How force is inward for current carrying 2 parallel wires

there are three sources of sound of equal intensities with freq. 200,201,202 Hz resp. if all sounded simultaneously the beat freq heard by listener?

For a constant resistance, the correct relation between heat produced (H) and electric current (I) flowing is:

9. A cubical vessel of height 1 m is full of water. The minimum work done in taking water-out from vessel will be (1)5000j(2) 10000j(3) 5j (4) 10

A man consumes glucose and then he moves a block which then comes to rest after sliding on a rough floor. The correct order of energy changes can be

What is the meaning of angular momentum in simple words?

What is nuclear fission reaction

The possibility of overloading occurs when___.

Which has larger frequency – infrasonic sound or ultrasonic sound?