16569 + Interview Questions in Physics

1.	Question 27Explain the refraction of light through a triangular glass prism using a labelled ray diagram. Hence define the angle of deviation.
Answer» Question 27 Explain the refraction of light through a triangular glass prism using a labelled ray diagram. Hence define the angle of deviation.

Discussion

2.	State two factors on which the magnitude of induced e.m.f. in a coil depend.
Answer» State two factors on which the magnitude of induced e.m.f. in a coil depend.

Discussion

3.	what is week nuclear force and electromagnetic force?
Answer» what is week nuclear force and electromagnetic force?

Discussion

4.	For the circuit shown in the diagram given below:Calculate:(a) the value of current through each resistor.(b) the total current in the circuit.(c) the total effective resistance of the circuit.
Answer» For the circuit shown in the diagram given below: Calculate: (a) the value of current through each resistor. (b) the total current in the circuit. (c) the total effective resistance of the circuit.

Discussion

5.	Two transparent media A and B are separated by a plane boundary. The speed of light in medium A is 2.0×108 ms−1 and in medium B is 2.5×108 ms−1. The critical angle for a ray of light going from medium A to B is :
Answer» Two transparent media $A$ and $B$ are separated by a plane boundary. The speed of light in medium $A$ is $2.0 \times 10^{8} {ms}^{- 1}$ and in medium $B$ is $2.5 \times 10^{8} {ms}^{- 1}$ . The critical angle for a ray of light going from medium $A$ to $B$ is :

Discussion

6.	Why non conservative field have closed loops?
Answer» Why non conservative field have closed loops?

Discussion

7.	How much amount of heat required to raise 1 degree celsius to unit mass of substance ?Express in S.I and C.G.S systems.
Answer» How much amount of heat required to raise 1 degree celsius to unit mass of substance ?Express in S.I and C.G.S systems.

Discussion

8.	(4) 2iBo3) iBTwo protons A and B move parallel to the x-axis inopposite directions with equal speeds v. At theinstant shown, the ratio of magnetic force andelectric force acting on the proton A is (c = speedof light in vacuum)21.(2) 2vd
Answer» (4) 2iBo3) iBTwo protons A and B move parallel to the x-axis inopposite directions with equal speeds v. At theinstant shown, the ratio of magnetic force andelectric force acting on the proton A is (c = speedof light in vacuum)21.(2) 2vd

Discussion

9.	Magnetic field on the axis of a circular current loop
Answer» Magnetic field on the axis of a circular current loop

Discussion

10.	a paritcle moves with cons†an t accleration along a straight line starting from rest.the percentage increases in its displacement during the 4th second compared to that in 3rd second is
Answer» a paritcle moves with cons†an t accleration along a straight line starting from rest.the percentage increases in its displacement during the 4th second compared to that in 3rd second is

Discussion

11.	A satellite is moving with a constant speed V in a circular orbit about the earth. An object of mass m is ejected from the satellite such that it just escapes from the gravitational pull of the earth. At the time of its ejection, the kinetic energy of the object is
Answer» A satellite is moving with a constant speed $V$ in a circular orbit about the earth. An object of mass $m$ is ejected from the satellite such that it just escapes from the gravitational pull of the earth. At the time of its ejection, the kinetic energy of the object is

Discussion

12.	The critical angle for glass-water surface is (refractive index of glass = 1.5 and refractive index of water =43)
Answer» The critical angle for glass-water surface is (refractive index of glass = 1.5 and refractive index of water $= \frac{4}{3}$ )

Discussion

13.	What will be the resultant focal length of the combination when a thin convex lens is kept in contact with a thin concave lens ?
Answer» What will be the resultant focal length of the combination when a thin convex lens is kept in contact with a thin concave lens ?

Discussion

14.	A fixed volume of iron is drawn into a wire of length l. The extension produced in this wire by a constant force F is proportional to
Answer» A fixed volume of iron is drawn into a wire of length l. The extension produced in this wire by a constant force F is proportional to

Discussion

15.	The relation between the temperature (T) of a fuse wire and the current (I) passing through it, is given by ΔT∝I2, at constant resistance. Which of the following plots correctly represents the relation?
Answer» The relation between the temperature ( $T$ ) of a fuse wire and the current ( $I$ ) passing through it, is given by $Δ T \propto I^{2}$ , at constant resistance. Which of the following plots correctly represents the relation?

Discussion

16.	The organs of the body that can be donated posthumous (after death)
Answer» The organs of the body that can be donated posthumous (after death)

Discussion

17.	Why does sun appear yellowish-white at the noon?
Answer» Why does sun appear yellowish-white at the noon?

Discussion

18.	Consider two insulated chambers (A, B) of samevolume connected by a closed knob, S. 1 mole ofperfect gas is confined in chamber A. What is thechange in entropy of gas when knob S is opened?R 8.31 J mol-1K-1146 JK3 5.46 JIK(2) 3.46 J/K(4) 7.46 JK AS
Answer» Consider two insulated chambers (A, B) of samevolume connected by a closed knob, S. 1 mole ofperfect gas is confined in chamber A. What is thechange in entropy of gas when knob S is opened?R 8.31 J mol-1K-1146 JK3 5.46 JIK(2) 3.46 J/K(4) 7.46 JK AS

Discussion

19.	The frequency of the note is 216Hz. The frequency of the note which is one octave higher than the given frequency is :-(1)864Hz (2)1080Hz (3)432Hz (4)648Hz
Answer» The frequency of the note is 216Hz. The frequency of the note which is one octave higher than the given frequency is :- (1)864Hz (2)1080Hz (3)432Hz (4)648Hz

Discussion

20.	Difference b/w limit and differentiation
Answer» Difference b/w limit and differentiation

Discussion

21.	KO for the equation A(s) gives B(g)+ C(g)+ D(s) is9 atm2. Then the total pressure at equilibrium will11.be(1) 3 atm(2) 9 atm(3) 6 atm(4) 12 atm
Answer» KO for the equation A(s) gives B(g)+ C(g)+ D(s) is9 atm2. Then the total pressure at equilibrium will11.be(1) 3 atm(2) 9 atm(3) 6 atm(4) 12 atm

Discussion

22.	The phenomenon where a ray of light doesn't enter the rarer medium and instead reflects back to the denser medium is known as ___ .
Answer» The phenomenon where a ray of light doesn't enter the rarer medium and instead reflects back to the denser medium is known as ___ .

Discussion

23.	Draw ray diagrams to represent the nature, position and relative size of the image formed by a convex lens for the object placed:(a) at 2F1(b) between F1 and the optical center O of the lens
Answer» Draw ray diagrams to represent the nature, position and relative size of the image formed by a convex lens for the object placed: (a) at 2F₁ (b) between F₁ and the optical center O of the lens

Discussion

24.	In Rutherford scattering experiment, what will be the correct angle for α−scattering, for an impact parameter b=0?
Answer» In Rutherford scattering experiment, what will be the correct angle for $α -$ scattering, for an impact parameter $b = 0$ ?

Discussion

25.	Two identiacal metal blocks L and M (specific heat =0.4kJ/kgK), each having a mass of 5kg, are initialy at 313K. A reversible refrigerator extracts heat from block L and rejects heat to block M untill the tmperature of block L reaches 293K. The final temperature in (K) of block M is334.36
Answer» Two identiacal metal blocks $L$ and $M$ (specific heat $= 0.4 k J / k g K$ ), each having a mass of $5 k g$ , are initialy at $313 K$ . A reversible refrigerator extracts heat from block $L$ and rejects heat to block $M$ untill the tmperature of block $L$ reaches $293 K$ . The final temperature in (K) of block $M$ is 334.36

Discussion

26.	When the ice from the frozen lakes starts to melt, the temperature of the surroundings ______.
Answer» When the ice from the frozen lakes starts to melt, the temperature of the surroundings ______.

Discussion

27.	1 : The value of 2 resistance are (5.0+-.2) kohm and (10.0+-.1) kohm . What is the %error in equivalent resistance when they are connected in parallel ? 2 : The length of a rod is (11.05+-0.2)cm. What is the length of two rods ?
Answer» 1 : The value of 2 resistance are (5.0+-.2) kohm and (10.0+-.1) kohm . What is the %error in equivalent resistance when they are connected in parallel ? 2 : The length of a rod is (11.05+-0.2)cm. What is the length of two rods ?

Discussion

28.	For two resistors R1, and R2, connected inparallel, the relative equivalentresistance is (Where R1 = (300 +or- 3)ohm andR 2= (200 +or-2 )ohm
Answer» For two resistors R1, and R2, connected in parallel, the relative equivalent resistance is (Where R1 = (300 +or- 3)ohm and R 2= (200 +or-2 )ohm

Discussion

29.	The heat dissipated in a resistance can be obtained by the measurement of resistance current and times if the maximum error in the measurement of these quantities are 1 % percentage 2% and 1% respectively what is the maximum error in the determination of dissipated heat
Answer» The heat dissipated in a resistance can be obtained by the measurement of resistance current and times if the maximum error in the measurement of these quantities are 1 % percentage 2% and 1% respectively what is the maximum error in the determination of dissipated heat

Discussion

30.	In the figure below shows a lever in use. (a) To which class of lever does it belong? (b) If AB = 1m, AF = 0.4 m, find its mechanical advantage. (c) Calculate the value of E.
Answer» In the figure below shows a lever in use. (a) To which class of lever does it belong? (b) If AB = 1m, AF = 0.4 m, find its mechanical advantage. (c) Calculate the value of E.

30.

In the figure below shows a lever in use. (a) To which class of lever does it belong? (b) If AB = 1m, AF = 0.4 m, find its mechanical advantage. (c) Calculate the value of E.

Answer»

In the figure below shows a lever in use.

(a) To which class of lever does it belong?

(b) If AB = 1m, AF = 0.4 m, find its mechanical advantage.

(c) Calculate the value of E.

Discussion

31.	In many applications, solar cells are connected to rechargeable batteries. Why is this so ?
Answer» In many applications, solar cells are connected to rechargeable batteries. Why is this so ?

Discussion

32.	41. Define with figure when the object is at infinity where will the image will form in (i)Concave lense (ii)Convex Lense And give the condition if the Ray's are not parallel to priciple axis.
Answer» 41. Define with figure when the object is at infinity where will the image will form in (i)Concave lense (ii)Convex Lense And give the condition if the Ray's are not parallel to priciple axis.

Discussion

33.	The resistance of the bulb filament is 100 Ω at a temperature of 100∘ C. If its temperature co-efficient of resistance be 0.005 per ∘ C, its resistance will become 200 Ω at a temperature
Answer» The resistance of the bulb filament is 100 $Ω$ at a temperature of 100 $^{\circ}$ C. If its temperature co-efficient of resistance be 0.005 per $^{\circ}$ C, its resistance will become 200 $Ω$ at a temperature

Discussion

34.

Match the column: I II III Heat generated Is used to reduce effective resistance in a circuit V = IR Resistances in parallel Proportional to the square of current Resistivity Gives relation between V and I Ohm’s law Depends on the material of the conductor

Answer»

Match the column:

I	II	III
Heat generated	Is used to reduce effective resistance in a circuit	V = IR
Resistances in parallel	Proportional to the square of current
Resistivity	Gives relation between V and I
Ohm’s law	Depends on the material of the conductor

Discussion

35.	a long hollow semicylinder of randius R ,carries a current I, find field at mid of axe
Answer» a long hollow semicylinder of randius R ,carries a current I, find field at mid of axe

Discussion

36.	ntIn a 0.2molar aqueous solution of weak acid HX the degree of ionization is 0.3.The freezing point of the solution will be nearest ton
Answer» ntIn a 0.2molar aqueous solution of weak acid HX the degree of ionization is 0.3.The freezing point of the solution will be nearest ton

Discussion

37.	(a) What is myopia (near-sightedness)?(b) Draw a ray diagram to show an eye having myopia.(c) Draw another ray-diagram to show how myopia can be corrected by using a lens.
Answer» (a) What is myopia (near-sightedness)? (b) Draw a ray diagram to show an eye having myopia. (c) Draw another ray-diagram to show how myopia can be corrected by using a lens.

Discussion

38.	Schematic diagrams with variable positions of Fulcrum, Load and effort for the levers of class I are shown below. Their MA values, respectively, will be
Answer» Schematic diagrams with variable positions of Fulcrum, Load and effort for the levers of class I are shown below. Their MA values, respectively, will be

38.

Schematic diagrams with variable positions of Fulcrum, Load and effort for the levers of class I are shown below. Their MA values, respectively, will be

Answer»

Schematic diagrams with variable positions of Fulcrum, Load and effort for the levers of class I are shown below.

Their MA values, respectively, will be

Discussion

39.	How is a fuse put in an electric circuit? State the purpose of using a fuse in a circuit.
Answer» How is a fuse put in an electric circuit? State the purpose of using a fuse in a circuit.

39.

How is a fuse put in an electric circuit? State the purpose of using a fuse in a circuit.

Answer»

How is a fuse put in an electric circuit? State the purpose of using a fuse in a circuit.

Discussion

40.	at a place horizontal and vertical components of earths magnetic field are as follows Bh=1G 10 west of north Bv = 1G vertically downward then dip angle and declination are respectivel
Answer» at a place horizontal and vertical components of earths magnetic field are as follows Bh=1G 10 west of north Bv = 1G vertically downward then dip angle and declination are respectivel

Discussion

41.	A large volume of water is gushing through a pipe which narrows at the outlet. At which point, A, B or C will the water flow be the fastest?
Answer» A large volume of water is gushing through a pipe which narrows at the outlet. At which point, A, B or C will the water flow be the fastest?

41.

A large volume of water is gushing through a pipe which narrows at the outlet. At which point, A, B or C will the water flow be the fastest?

Answer»

A large volume of water is gushing through a pipe which narrows at the outlet. At which point, A, B or C will the water flow be the fastest?

Discussion

42.	What is the proper meaning of light or what is ligth
Answer» What is the proper meaning of light or what is ligth

Discussion

43.	A plano-convex lens of radius of curvature of 30 cm and refractive index 1.5 produces a real image of an object kept 90 cm from it. What is the magnitude of magnification ?
Answer» A plano-convex lens of radius of curvature of $30 cm$ and refractive index $1.5$ produces a real image of an object kept $90 cm$ from it. What is the magnitude of magnification ?

Discussion

44.	Find the derivative of e to the power (1+cos 2x / tan cube x) by using 1st principle of derivative
Answer» Find the derivative of e to the power (1+cos 2x / tan cube x) by using 1st principle of derivative

Discussion

45.	Which type of telescopes can be made using a concave mirror, convex mirror, plane mirror and a lens? Draw diagrams of these telescopes.
Answer» Which type of telescopes can be made using a concave mirror, convex mirror, plane mirror and a lens? Draw diagrams of these telescopes.

Discussion

46.	The expression for Velocity Ratio V.R, if the velocity of load and the velocity of the effort are denoted as V1 and V2 respectively is .
Answer» The expression for Velocity Ratio $V . R$ , if the velocity of load and the velocity of the effort are denoted as $V_{1}$ and $V_{2}$ respectively is .

Discussion

47.	Do we have to learn all the discoveries of the scientists given in the table?
Answer» Do we have to learn all the discoveries of the scientists given in the table?

Discussion

48.	A 3000-kg truck moving EAST with a speed of 5 km/hr collides head-on with a 1000-kg car moving WEST with a speed of 10 km/hr. The two vehicles stick together and move with the same velocity after the collision. Determine the post-collision velocity and the direction of the car and the truck?
Answer» A 3000-kg truck moving EAST with a speed of 5 km/hr collides head-on with a 1000-kg car moving WEST with a speed of 10 km/hr. The two vehicles stick together and move with the same velocity after the collision. Determine the post-collision velocity and the direction of the car and the truck?

Discussion

49.	Why 1 coulomb is 6.25*10^18 electrons ?
Answer» Why 1 coulomb is 6.25*10^18 electrons ?

Discussion

50.

A strong bar magnet is placed vertically above a horizontal wooden board. The magnetic lines of force will be: (a) only in horizontal plane around the magnet (b) only in vertical plane around the magnet (c) in horizontal as well as in vertical planes around the magnet (d) in all the planes around the magnet

Answer»

A strong bar magnet is placed vertically above a horizontal wooden board. The magnetic lines of force will be:

(a) only in horizontal plane around the magnet

(b) only in vertical plane around the magnet

(c) in horizontal as well as in vertical planes around the magnet

(d) in all the planes around the magnet

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Question 27Explain the refraction of light through a triangular glass prism using a labelled ray diagram. Hence define the angle of deviation.

State two factors on which the magnitude of induced e.m.f. in a coil depend.

what is week nuclear force and electromagnetic force?

For the circuit shown in the diagram given below:Calculate:(a) the value of current through each resistor.(b) the total current in the circuit.(c) the total effective resistance of the circuit.

Two transparent media A and B are separated by a plane boundary. The speed of light in medium A is 2.0×108 ms−1 and in medium B is 2.5×108 ms−1. The critical angle for a ray of light going from medium A to B is :

Why non conservative field have closed loops?

How much amount of heat required to raise 1 degree celsius to unit mass of substance ?Express in S.I and C.G.S systems.

(4) 2iBo3) iBTwo protons A and B move parallel to the x-axis inopposite directions with equal speeds v. At theinstant shown, the ratio of magnetic force andelectric force acting on the proton A is (c = speedof light in vacuum)21.(2) 2vd

Magnetic field on the axis of a circular current loop

a paritcle moves with cons†an t accleration along a straight line starting from rest.the percentage increases in its displacement during the 4th second compared to that in 3rd second is

A satellite is moving with a constant speed V in a circular orbit about the earth. An object of mass m is ejected from the satellite such that it just escapes from the gravitational pull of the earth. At the time of its ejection, the kinetic energy of the object is

The critical angle for glass-water surface is (refractive index of glass = 1.5 and refractive index of water =43)

What will be the resultant focal length of the combination when a thin convex lens is kept in contact with a thin concave lens ?

A fixed volume of iron is drawn into a wire of length l. The extension produced in this wire by a constant force F is proportional to

The relation between the temperature (T) of a fuse wire and the current (I) passing through it, is given by ΔT∝I2, at constant resistance. Which of the following plots correctly represents the relation?

The organs of the body that can be donated posthumous (after death)

Why does sun appear yellowish-white at the noon?

Consider two insulated chambers (A, B) of samevolume connected by a closed knob, S. 1 mole ofperfect gas is confined in chamber A. What is thechange in entropy of gas when knob S is opened?R 8.31 J mol-1K-1146 JK3 5.46 JIK(2) 3.46 J/K(4) 7.46 JK AS

The frequency of the note is 216Hz. The frequency of the note which is one octave higher than the given frequency is :-(1)864Hz (2)1080Hz (3)432Hz (4)648Hz

Difference b/w limit and differentiation

KO for the equation A(s) gives B(g)+ C(g)+ D(s) is9 atm2. Then the total pressure at equilibrium will11.be(1) 3 atm(2) 9 atm(3) 6 atm(4) 12 atm

The phenomenon where a ray of light doesn't enter the rarer medium and instead reflects back to the denser medium is known as ___ .

Draw ray diagrams to represent the nature, position and relative size of the image formed by a convex lens for the object placed:(a) at 2F1(b) between F1 and the optical center O of the lens

In Rutherford scattering experiment, what will be the correct angle for α−scattering, for an impact parameter b=0?

Two identiacal metal blocks L and M (specific heat =0.4kJ/kgK), each having a mass of 5kg, are initialy at 313K. A reversible refrigerator extracts heat from block L and rejects heat to block M untill the tmperature of block L reaches 293K. The final temperature in (K) of block M is334.36

When the ice from the frozen lakes starts to melt, the temperature of the surroundings ______.

1 : The value of 2 resistance are (5.0+-.2) kohm and (10.0+-.1) kohm . What is the %error in equivalent resistance when they are connected in parallel ? 2 : The length of a rod is (11.05+-0.2)cm. What is the length of two rods ?

For two resistors R1, and R2, connected inparallel, the relative equivalentresistance is (Where R1 = (300 +or- 3)ohm andR 2= (200 +or-2 )ohm

The heat dissipated in a resistance can be obtained by the measurement of resistance current and times if the maximum error in the measurement of these quantities are 1 % percentage 2% and 1% respectively what is the maximum error in the determination of dissipated heat

In the figure below shows a lever in use. (a) To which class of lever does it belong? (b) If AB = 1m, AF = 0.4 m, find its mechanical advantage. (c) Calculate the value of E.

In many applications, solar cells are connected to rechargeable batteries. Why is this so ?

41. Define with figure when the object is at infinity where will the image will form in (i)Concave lense (ii)Convex Lense And give the condition if the Ray's are not parallel to priciple axis.

The resistance of the bulb filament is 100 Ω at a temperature of 100∘ C. If its temperature co-efficient of resistance be 0.005 per ∘ C, its resistance will become 200 Ω at a temperature

Match the column: I II III Heat generated Is used to reduce effective resistance in a circuit V = IR Resistances in parallel Proportional to the square of current Resistivity Gives relation between V and I Ohm’s law Depends on the material of the conductor

a long hollow semicylinder of randius R ,carries a current I, find field at mid of axe

ntIn a 0.2molar aqueous solution of weak acid HX the degree of ionization is 0.3.The freezing point of the solution will be nearest ton

(a) What is myopia (near-sightedness)?(b) Draw a ray diagram to show an eye having myopia.​(c) Draw another ray-diagram to show how myopia can be corrected by using a lens.

Schematic diagrams with variable positions of Fulcrum, Load and effort for the levers of class I are shown below. Their MA values, respectively, will be

How is a fuse put in an electric circuit? State the purpose of using a fuse in a circuit.

at a place horizontal and vertical components of earths magnetic field are as follows Bh=1G 10 west of north Bv = 1G vertically downward then dip angle and declination are respectivel

A large volume of water is gushing through a pipe which narrows at the outlet. At which point, A, B or C will the water flow be the fastest?

What is the proper meaning of light or what is ligth

A plano-convex lens of radius of curvature of 30 cm and refractive index 1.5 produces a real image of an object kept 90 cm from it. What is the magnitude of magnification ?

Find the derivative of e to the power (1+cos 2x / tan cube x) by using 1st principle of derivative

Which type of telescopes can be made using a concave mirror, convex mirror, plane mirror and a lens? Draw diagrams of these telescopes.

The expression for Velocity Ratio V.R, if the velocity of load and the velocity of the effort are denoted as V1 and V2 respectively is .

Do we have to learn all the discoveries of the scientists given in the table?

A 3000-kg truck moving EAST with a speed of 5 km/hr collides head-on with a 1000-kg car moving WEST with a speed of 10 km/hr. The two vehicles stick together and move with the same velocity after the collision. Determine the post-collision velocity and the direction of the car and the truck?

Why 1 coulomb is 6.25*10^18 electrons ?

(a) What is myopia (near-sightedness)?(b) Draw a ray diagram to show an eye having myopia.(c) Draw another ray-diagram to show how myopia can be corrected by using a lens.