16569 + Interview Questions in Physics

1.	A straight wire carries a current of 3A. Calculate the magnitude of the magnetic field at a point 10 cm away from the wire.
Answer» A straight wire carries a current of 3A. Calculate the magnitude of the magnetic field at a point 10 cm away from the wire.

Discussion

2.	When a ray of light from air enters a denser medium, it : (a) bends away from the normal (b) bends towards the normal (c) goes undeviated (d) is reflected back.
Answer» When a ray of light from air enters a denser medium, it : (a) bends away from the normal (b) bends towards the normal (c) goes undeviated (d) is reflected back.

2.

When a ray of light from air enters a denser medium, it : (a) bends away from the normal (b) bends towards the normal (c) goes undeviated (d) is reflected back.

Answer»

When a ray of light from air enters a denser medium, it :

(a) bends away from the normal

(b) bends towards the normal

(c) goes undeviated

(d) is reflected back.

Discussion

3.	A 200 Ω resistor has a certain color code. If one replaces the red color by green in the code, the new resistance will be
Answer» A $200 Ω$ resistor has a certain color code. If one replaces the red color by green in the code, the new resistance will be

Discussion

4.	13.6 electron volt energy is required to separate a hydrogen atom into a proton and electron then the velocity of revolving electron is
Answer» 13.6 electron volt energy is required to separate a hydrogen atom into a proton and electron then the velocity of revolving electron is

Discussion

5.	Which of the following is not the quality of an ideal source of energy?
Answer» Which of the following is not the quality of an ideal source of energy?

Discussion

6.	Which of the following causes more severe burns?
Answer» Which of the following causes more severe burns?

Discussion

7.	A carbon resistor has colour code of brown, green, gold and silver. The resistance of the resistor will be
Answer» A carbon resistor has colour code of brown, green, gold and silver. The resistance of the resistor will be

Discussion

8.	How much heat energy is released when 5.0 g of water at 20oC changes into ice at 0oC? Take specific heat capacity of water = 4.2 J g−1 K−1, specific latent heat of fusion of ice = 336 J g−1.
Answer» How much heat energy is released when 5.0 g of water at $20^{o} C$ changes into ice at $0^{o} C$ ? Take specific heat capacity of water = 4.2 J $g^{-} 1 K^{- 1}$ , specific latent heat of fusion of ice = 336 J $g^{- 1}$ .

8.

How much heat energy is released when 5.0 g of water at 20oC changes into ice at 0oC? Take specific heat capacity of water = 4.2 J g−1 K−1, specific latent heat of fusion of ice = 336 J g−1.

Answer»

How much heat energy is released when 5.0 g of water at $20^{o} C$ changes into ice at $0^{o} C$ ? Take specific heat capacity of water = 4.2 J $g^{-} 1 K^{- 1}$ , specific latent heat of fusion of ice = 336 J $g^{- 1}$ .

Discussion

9.	State whether the following statement is true or false : An electric motor converts mechanical energy into electrical energy.
Answer» State whether the following statement is true or false : An electric motor converts mechanical energy into electrical energy.

9.

State whether the following statement is true or false : An electric motor converts mechanical energy into electrical energy.

Answer»

State whether the following statement is true or false :

An electric motor converts mechanical energy into electrical energy.

Discussion

10.	A piece of cork id floating on water in a smalltank. The cork oscillates up and down vertically when small ripples pass overthe surface of water. The velocity of the ripples being 0.21 ms-1,wave length 15 mm and amplitude 5 mm, the maximum velocity of the piece of corkis
Answer» A piece of cork id floating on water in a small tank. The cork oscillates up and down vertically when small ripples pass over the surface of water. The velocity of the ripples being 0.21 ms^-1, wave length 15 mm and amplitude 5 mm, the maximum velocity of the piece of cork is

10.

A piece of cork id floating on water in a smalltank. The cork oscillates up and down vertically when small ripples pass overthe surface of water. The velocity of the ripples being 0.21 ms-1,wave length 15 mm and amplitude 5 mm, the maximum velocity of the piece of corkis

Answer»

A piece of cork id floating on water in a small
tank. The cork oscillates up and down vertically when small ripples pass over
the surface of water. The velocity of the ripples being 0.21 ms^-1,
wave length 15 mm and amplitude 5 mm, the maximum velocity of the piece of cork
is

Discussion

11.	Name the commercial unit of electrical Energy. How it is related to its SI unit?
Answer» Name the commercial unit of electrical Energy. How it is related to its SI unit?

Discussion

12.	find the value of 60J/min on a system that has 100g ,100cm and 1mi as base unit
Answer» find the value of 60J/min on a system that has 100g ,100cm and 1mi as base unit

Discussion

13.	Critical angle of medium A is Ia and critical angle of medium B is Ib.If Ia>Ib then find out the critical angle of interface of medium A
Answer» Critical angle of medium A is Ia and critical angle of medium B is Ib.If Ia>Ib then find out the critical angle of interface of medium A

Discussion

14.	Statement 1: When a white light ray passes through a prism it disperses into seven different colours, and this phenomenon is called dispersion. Statement 2: Refraction depends upon the wavelength of light and since different colours have different wavelengths, they are refracted at a different angle.
Answer» Statement 1: When a white light ray passes through a prism it disperses into seven different colours, and this phenomenon is called dispersion. Statement 2: Refraction depends upon the wavelength of light and since different colours have different wavelengths, they are refracted at a different angle.

14.

Statement 1: When a white light ray passes through a prism it disperses into seven different colours, and this phenomenon is called dispersion. Statement 2: Refraction depends upon the wavelength of light and since different colours have different wavelengths, they are refracted at a different angle.

Answer»

Statement 1: When a white light ray passes through a prism it disperses into seven different colours, and this phenomenon is called dispersion.

Statement 2: Refraction depends upon the wavelength of light and since different colours have different wavelengths, they are refracted at a different angle.

Discussion

15.	the pressure of an ideal gas varies according to law P=P_{0 }-AV^2 where p0 and A are positive cons†an ts .find the highest temperature attained by the ga
Answer» the pressure of an ideal gas varies according to law P=P_{0 }-AV^2 where p0 and A are positive cons†an ts .find the highest temperature attained by the ga

Discussion

16.	Saturn and Jupiter take 9 hours 56 min and 10 hours 40 min, respectively for one spin on their axes. Find the ratio of the time taken by Saturn and Jupiter in lowest form.
Answer» Saturn and Jupiter take 9 hours 56 min and 10 hours 40 min, respectively for one spin on their axes. Find the ratio of the time taken by Saturn and Jupiter in lowest form.

Discussion

17.	A lens made of glass of refractive index 32 has focal length f. Find its focal length when it is immersed in water of refractive index 43.
Answer» A lens made of glass of refractive index $\frac{3}{2}$ has focal length f. Find its focal length when it is immersed in water of refractive index $\frac{4}{3}$ .

Discussion

18.	What is the principle of an electric motor ? Name some of the devices in which electric motors are used.
Answer» What is the principle of an electric motor ? Name some of the devices in which electric motors are used.

Discussion

19.	70.Why is total energy zero when a body is projected at escape speed?
Answer» 70.Why is total energy zero when a body is projected at escape speed?

Discussion

20.	A ray of light falls at an angle of 30∘ onto a plane parallel glass plate and it leaves parallel to the initial ray. What is the thickness of the plate if the distance between the direction of incident ray and emergent ray is 3.82 cm?[Given: μg=1.5,sin−1(13)=19.5∘, cos(19.5∘)=0.94,sin(10.5∘)=0.18]
Answer» A ray of light falls at an angle of $30^{\circ}$ onto a plane parallel glass plate and it leaves parallel to the initial ray. What is the thickness of the plate if the distance between the direction of incident ray and emergent ray is $3.82 cm$ ? [Given: $μ_{g} = 1.5, {sin}^{- 1} (\frac{1}{3}) = {19.5}^{\circ}, cos ({19.5}^{\circ}) = 0.94, sin ({10.5}^{\circ}) = 0.18$ ]

Discussion

21.	ntAn electric heater of resistance 8 ohm draws 15 Ampere current from the service mains 2 hours. Calculate the rate at which heat is developed in the heater.n
Answer» ntAn electric heater of resistance 8 ohm draws 15 Ampere current from the service mains 2 hours. Calculate the rate at which heat is developed in the heater.n

Discussion

22.	Give three reasons why different electrical appliances in a domestic circuit are connected in parallel.
Answer» Give three reasons why different electrical appliances in a domestic circuit are connected in parallel.

Discussion

23.	23.A wave of frequency 500 HZ has a phase velocity of 300m/s. How far apart are two point 45^° out of phase? and What is the phase difference between two displacement at a certain point at times 2÷ 1000 s apart?
Answer» 23.A wave of frequency 500 HZ has a phase velocity of 300m/s. How far apart are two point 45^° out of phase? and What is the phase difference between two displacement at a certain point at times 2÷ 1000 s apart?

Discussion

24.	An equiconvex lens of refractive index (3/2) and focal length 10cm is held with its axis vertical and its lower surface immersed in water (4/3).the upper surface being in air. At what distance from the lens will a vertical beam of parallel light incident on the lens be focused?
Answer» An equiconvex lens of refractive index (3/2) and focal length 10cm is held with its axis vertical and its lower surface immersed in water (4/3).the upper surface being in air. At what distance from the lens will a vertical beam of parallel light incident on the lens be focused?

Discussion

25.	35.Q.With a certain cell the balance point is obtained at 60cm from the zero end of the potentiometer wire. With another cell whose emf differs from that of the first cell by 0.1V ,the balance point is obtained at 55cm mark.Calculate the emf of the two cells.
Answer» 35.Q.With a certain cell the balance point is obtained at 60cm from the zero end of the potentiometer wire. With another cell whose emf differs from that of the first cell by 0.1V ,the balance point is obtained at 55cm mark.Calculate the emf of the two cells.

Discussion

26.	What is the important element of energy policy?
Answer» What is the important element of energy policy?

Discussion

27.	Two spheres of mass m and M are situated in air and gravitational force between them is F. The space around the masses is now filled with a liquid of specific gravity 3. The gravitational force now will be
Answer» Two spheres of mass $m$ and $M$ are situated in air and gravitational force between them is $F$ . The space around the masses is now filled with a liquid of specific gravity $3$ . The gravitational force now will be

Discussion

28.	what is nu
Answer» what is nu

Discussion

29.	maximum velocity of particle in SHM is 2cm then magnitude of av velocity during one extreme position to another extreme position is
Answer» maximum velocity of particle in SHM is 2cm then magnitude of av velocity during one extreme position to another extreme position is

Discussion

30.	Question 4A spherical mirror and a thin spherical lens have each a focal length of -15 cm. The mirror and the lens are likely to be(a) both concave(b) both convex(c) the mirror is concave and the lens is convex(d) the mirror is convex, but the lens is concave
Answer» Question 4 A spherical mirror and a thin spherical lens have each a focal length of -15 cm. The mirror and the lens are likely to be (a) both concave (b) both convex (c) the mirror is concave and the lens is convex (d) the mirror is convex, but the lens is concave

Discussion

31.	The ideal gas equation is:
Answer» The ideal gas equation is:

Discussion

32.	The dispersion of white light when it passes through a prism shows that:
Answer» The dispersion of white light when it passes through a prism shows that:

Discussion

33.	Draw a labelled ray diagram of refraction of light through a parallel glass slab and triangular glass prism.
Answer» Draw a labelled ray diagram of refraction of light through a parallel glass slab and triangular glass prism.

Discussion

34.	Four combinations of two thin lenses are given in List - I. The radius of curvature of all curved surfaces is r and the refractive index of the medium of all the lenses is 1.5. Match the lens combination in List - I with their focal length in List - II and select the correct answer using the code given below the lists.
Answer» Four combinations of two thin lenses are given in List - I. The radius of curvature of all curved surfaces is $r$ and the refractive index of the medium of all the lenses is $1.5$ . Match the lens combination in List - I with their focal length in List - II and select the correct answer using the code given below the lists.

Discussion

35.	A pipe of length 85 cm is closed from one end. Find the number of possible natural oscillations of air column in the pipe whose frequencies lie below 1250 Hz. The velocity of sound in air is 340 m/s.
Answer» A pipe of length $85 cm$ is closed from one end. Find the number of possible natural oscillations of air column in the pipe whose frequencies lie below $1250 Hz$ . The velocity of sound in air is $340 m/s$ .

Discussion

36.	Macula lutea is located in
Answer» Macula lutea is located in

Discussion

37.	What happens when a light ray is incident normally on a refracting surface?
Answer» What happens when a light ray is incident normally on a refracting surface?

Discussion

38.	what is equivalent mass of kmno
Answer» what is equivalent mass of kmno

Discussion

39.	10800 C of electricity through the electrolyte deposited 2.977 g of metal with atomic mass 106.4 g mol. The charge on the metal will be?
Answer» 10800 C of electricity through the electrolyte deposited 2.977 g of metal with atomic mass 106.4 g mol. The charge on the metal will be?

Discussion

40.	A ball thrown up vertically returns to the thrower after 6 s. Find(a) the velocity with which it was thrown up,(b) the maximum height it reaches, and(c) its position after 4 s
Answer» A ball thrown up vertically returns to the thrower after 6 s. Find (a) the velocity with which it was thrown up, (b) the maximum height it reaches, and (c) its position after 4 s

Discussion

41.	A parallel beam of light is incident on the system of two convex lenses of focal lengths f1=20 cm and f2=10 cm. What should be the distance between the two lenses so that rays after refraction from both the lenses pass undeviated ?
Answer» A parallel beam of light is incident on the system of two convex lenses of focal lengths $f_{1} = 20 cm$ and $f_{2} = 10 cm$ . What should be the distance between the two lenses so that rays after refraction from both the lenses pass undeviated ?

Discussion

42.	The resistance of a wire is 24 ohm. What will be the new resistance if (a) only the length of the conductor is increased to 3 times of its original length. (b) only the cross section area of the wire is doubled?
Answer» The resistance of a wire is 24 ohm. What will be the new resistance if (a) only the length of the conductor is increased to 3 times of its original length. (b) only the cross section area of the wire is doubled?

42.

The resistance of a wire is 24 ohm. What will be the new resistance if (a) only the length of the conductor is increased to 3 times of its original length. (b) only the cross section area of the wire is doubled?

Answer»

The resistance of a wire is 24 ohm. What will be the new resistance if

(a) only the length of the conductor is increased to 3 times of its original length.

(b) only the cross section area of the wire is doubled?

Discussion

43.	Which of the following airports has become world's first solar- run airport?
Answer» Which of the following airports has become world's first solar- run airport?

Discussion

44.	The temperature of water at the bottom of a waterfall will be different from the temperature at the top because:
Answer» The temperature of water at the bottom of a waterfall will be different from the temperature at the top because:

Discussion

45.	Find the value of V2 from the given circuit. 16
Answer» Find the value of $V_{2}$ from the given circuit. 16

Discussion

46.	succesive elerctron gain enthalpy of 17th group
Answer» succesive elerctron gain enthalpy of 17th group

Discussion

47.	A light ray passes through a glass slab at an angle from air. The same glass slab is now placed in a tank of water. If the same light ray is now allowed to pass through the glass slab, compare the lateral displacement of the light ray in both the cases.(Given that nwater=1.33 and nglass=1.5)
Answer» A light ray passes through a glass slab at an angle from air. The same glass slab is now placed in a tank of water. If the same light ray is now allowed to pass through the glass slab, compare the lateral displacement of the light ray in both the cases. (Given that $n_{w a t e r} = 1.33$ and $n_{g l a s s} = 1.5$ )

Discussion

48.	An object is placed 1.5 m in front of the curved surface of a plano-convex lens whose flat surface is silvered. A real image is formed at 'x' m in front of the lens. The focal length of lens is 2 m. Then 'x' is_______.
Answer» An object is placed 1.5 m in front of the curved surface of a plano-convex lens whose flat surface is silvered. A real image is formed at 'x' m in front of the lens. The focal length of lens is 2 m. Then 'x' is_______.

Discussion

49.	In AC generator,e=e sin ωt and flux=Φsin ωtSo there is phase difference of 90. So when e is max then flux should also be min. Is ot correct
Answer» In AC generator,e=e sin ωt and flux=Φsin ωt So there is phase difference of 90. So when e is max then flux should also be min. Is ot correct

Discussion

50.	Critical angle for a light ray travelling from denser to rarer medium is defined as the angle of incidence at which the angle of refraction is 90°.If a ray of light travels from water (μw) to air (μa). Find the critical angle?
Answer» Critical angle for a light ray travelling from denser to rarer medium is defined as the angle of incidence at which the angle of refraction is 90°. If a ray of light travels from water $(μ_{w})$ to air $(μ_{a})$ . Find the critical angle?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A straight wire carries a current of 3A. Calculate the magnitude of the magnetic field at a point 10 cm away from the wire.

When a ray of light from air enters a denser medium, it : (a) bends away from the normal (b) bends towards the normal (c) goes undeviated (d) is reflected back.

A 200 Ω resistor has a certain color code. If one replaces the red color by green in the code, the new resistance will be

13.6 electron volt energy is required to separate a hydrogen atom into a proton and electron then the velocity of revolving electron is

Which of the following is not the quality of an ideal source of energy?

Which of the following causes more severe burns?

A carbon resistor has colour code of brown, green, gold and silver. The resistance of the resistor will be

How much heat energy is released when 5.0 g of water at 20oC changes into ice at 0oC? Take specific heat capacity of water = 4.2 J g−1 K−1, specific latent heat of fusion of ice = 336 J g−1.

State whether the following statement is true or false : An electric motor converts mechanical energy into electrical energy.

A piece of cork id floating on water in a smalltank. The cork oscillates up and down vertically when small ripples pass overthe surface of water. The velocity of the ripples being 0.21 ms-1,wave length 15 mm and amplitude 5 mm, the maximum velocity of the piece of corkis

Name the commercial unit of electrical Energy. How it is related to its SI unit?

find the value of 60J/min on a system that has 100g ,100cm and 1mi as base unit

Critical angle of medium A is Ia and critical angle of medium B is Ib.If Ia>Ib then find out the critical angle of interface of medium A

the pressure of an ideal gas varies according to law P=P_{0 }-AV^2 where p0 and A are positive cons†an ts .find the highest temperature attained by the ga

Saturn and Jupiter take 9 hours 56 min and 10 hours 40 min, respectively for one spin on their axes. Find the ratio of the time taken by Saturn and Jupiter in lowest form.

A lens made of glass of refractive index 32 has focal length f. Find its focal length when it is immersed in water of refractive index 43.

What is the principle of an electric motor ? Name some of the devices in which electric motors are used.

70.Why is total energy zero when a body is projected at escape speed?

ntAn electric heater of resistance 8 ohm draws 15 Ampere current from the service mains 2 hours. Calculate the rate at which heat is developed in the heater.n

Give three reasons why different electrical appliances in a domestic circuit are connected in parallel.

23.A wave of frequency 500 HZ has a phase velocity of 300m/s. How far apart are two point 45^° out of phase? and What is the phase difference between two displacement at a certain point at times 2÷ 1000 s apart?

An equiconvex lens of refractive index (3/2) and focal length 10cm is held with its axis vertical and its lower surface immersed in water (4/3).the upper surface being in air. At what distance from the lens will a vertical beam of parallel light incident on the lens be focused?

35.Q.With a certain cell the balance point is obtained at 60cm from the zero end of the potentiometer wire. With another cell whose emf differs from that of the first cell by 0.1V ,the balance point is obtained at 55cm mark.Calculate the emf of the two cells.

What is the important element of energy policy?

Two spheres of mass m and M are situated in air and gravitational force between them is F. The space around the masses is now filled with a liquid of specific gravity 3. The gravitational force now will be

what is nu

maximum velocity of particle in SHM is 2cm then magnitude of av velocity during one extreme position to another extreme position is

Question 4A spherical mirror and a thin spherical lens have each a focal length of -15 cm. The mirror and the lens are likely to be(a) both concave(b) both convex(c) the mirror is concave and the lens is convex(d) the mirror is convex, but the lens is concave

The ideal gas equation is:

The dispersion of white light when it passes through a prism shows that:

Draw a labelled ray diagram of refraction of light through a parallel glass slab and triangular glass prism.

A pipe of length 85 cm is closed from one end. Find the number of possible natural oscillations of air column in the pipe whose frequencies lie below 1250 Hz. The velocity of sound in air is 340 m/s.

Macula lutea is located in

What happens when a light ray is incident normally on a refracting surface?

what is equivalent mass of kmno

10800 C of electricity through the electrolyte deposited 2.977 g of metal with atomic mass 106.4 g mol. The charge on the metal will be?

A ball thrown up vertically returns to the thrower after 6 s. Find(a) the velocity with which it was thrown up,(b) the maximum height it reaches, and(c) its position after 4 s

A parallel beam of light is incident on the system of two convex lenses of focal lengths f1=20 cm and f2=10 cm. What should be the distance between the two lenses so that rays after refraction from both the lenses pass undeviated ?

The resistance of a wire is 24 ohm. What will be the new resistance if (a) only the length of the conductor is increased to 3 times of its original length. (b) only the cross section area of the wire is doubled?

Which of the following airports has become world's first solar- run airport?

The temperature of water at the bottom of a waterfall will be different from the temperature at the top because:

Find the value of V2 from the given circuit. 16

succesive elerctron gain enthalpy of 17th group

A light ray passes through a glass slab at an angle from air. The same glass slab is now placed in a tank of water. If the same light ray is now allowed to pass through the glass slab, compare the lateral displacement of the light ray in both the cases.(Given that nwater=1.33 and nglass=1.5)

An object is placed 1.5 m in front of the curved surface of a plano-convex lens whose flat surface is silvered. A real image is formed at 'x' m in front of the lens. The focal length of lens is 2 m. Then 'x' is_______.

In AC generator,e=e sin ωt and flux=Φsin ωtSo there is phase difference of 90. So when e is max then flux should also be min. Is ot correct

Critical angle for a light ray travelling from denser to rarer medium is defined as the angle of incidence at which the angle of refraction is 90°.If a ray of light travels from water (μw) to air (μa). Find the critical angle?