16569 + Interview Questions in Physics

1.	A mosquito flaps its long front wings up to 600 times per second, what is the time period of the flaps?
Answer» A mosquito flaps its long front wings up to 600 times per second, what is the time period of the flaps?

Discussion

2.	what is the beat frequency heard if tuning forks of frequencies 200,201,204,206 hz are sounded together ? (1) 2 (2) 4 (3) 6 (4) 1
Answer» what is the beat frequency heard if tuning forks of frequencies 200,201,204,206 hz are sounded together ? (1) 2 (2) 4 (3) 6 (4) 1

Discussion

3.	Three resistors each of 4 Ohm are connected in the form of an equilateral triangle. The effective resistance across any two corners is:
Answer» Three resistors each of 4 Ohm are connected in the form of an equilateral triangle. The effective resistance across any two corners is:

Discussion

4.	a ray of light strikes a glass plate at an angle 60^°. if the reflected and refracted rays are perpendicular to each other, the index of refraction of glass i
Answer» a ray of light strikes a glass plate at an angle 60^°. if the reflected and refracted rays are perpendicular to each other, the index of refraction of glass i

Discussion

5.	A diver in a swimming pool wants to signal his distress to a person lying on the edge of the pool by flashing his water proof flash light.
Answer» A diver in a swimming pool wants to signal his distress to a person lying on the edge of the pool by flashing his water proof flash light.

Discussion

6.	ntIf 4 A current is passed through an aqueous FeCl3 sol how much time will be taken to deposit 2.5 g of Fe A 15 min B 54 min C 100 min D 3230 minn
Answer» ntIf 4 A current is passed through an aqueous FeCl3 sol how much time will be taken to deposit 2.5 g of Fe A 15 min B 54 min C 100 min D 3230 minn

Discussion

7.	Light is incident from air on oil at an angle of 30∘. After moving through oil-1 and another medium; oil-2, it enters glass and then it enters the water. If the refractive indices of glass and water are 1.5 and 1.3, respectively, find the angle which the ray makes with normal in water.
Answer» Light is incident from air on oil at an angle of $30^{\circ}$ . After moving through oil-1 and another medium; oil-2, it enters glass and then it enters the water. If the refractive indices of glass and water are $1.5$ and $1.3$ , respectively, find the angle which the ray makes with normal in water.

Discussion

8.	what is the phase difference between two waves of equal amplitude having same angular frequency with equal wavelength, to give i. maximum amplitude ii.minimum amplitude
Answer» what is the phase difference between two waves of equal amplitude having same angular frequency with equal wavelength, to give i. maximum amplitude ii.minimum amplitude

Discussion

9.	Why is speed of light independent of wavelength in vacuum but not in other media?
Answer» Why is speed of light independent of wavelength in vacuum but not in other media?

Discussion

10.	A postage stamp kept below a rectangular glass slab of refractive index 1.5 when viewed from vertically above it appears to be raised by 7.0mm calculate the thickness of the glass slab
Answer» A postage stamp kept below a rectangular glass slab of refractive index 1.5 when viewed from vertically above it appears to be raised by 7.0mm calculate the thickness of the glass slab

Discussion

11.	Distinguish between convex lens and concave lens.
Answer» Distinguish between convex lens and concave lens.

Discussion

12.	Mass of a body is tripled and its velocity is halved. Its momentum will
Answer» Mass of a body is tripled and its velocity is halved. Its momentum will

Discussion

13.	Q 17/30 If a body is thrown at speed of triple as thatof escape speed (ve) from earth's surface, then at whatspeed it will move in interstellar space?2/2VVe3 v
Answer» Q 17/30 If a body is thrown at speed of triple as thatof escape speed (ve) from earth's surface, then at whatspeed it will move in interstellar space?2/2VVe3 v

Discussion

14.	One surface of a biconvex lens having focal length 40 cm is silvered. The radius of the curvature of the other surface is 60 cm. At what distance from the silvered lens should an object be placed to obtain a real image magnified three times? (μg=1.5)
Answer» One surface of a biconvex lens having focal length $40 cm$ is silvered. The radius of the curvature of the other surface is $60 cm$ . At what distance from the silvered lens should an object be placed to obtain a real image magnified three times? $(μ_{g} = 1.5)$

Discussion

15.	A : scattering of red color is the least color as compared to the scattering of other colorsR : Intensity of scattering light is inversely promotional to the fourth power of wavelength.a Both A AND R are true and R is correct explanation b Both A AND R are true and R is incorrect explanationc A is true R is falsed A is false R is true
Answer» A : scattering of red color is the least color as compared to the scattering of other colors R : Intensity of scattering light is inversely promotional to the fourth power of wavelength. a Both A AND R are true and R is correct explanation b Both A AND R are true and R is incorrect explanation c A is true R is false d A is false R is true

Discussion

16.	In a nuclear fusion rection, if the energy is absorbed then(1) BE(product) > BE(reactant)(2) BE(product) < BE(reactant)(3) None of the above
Answer» In a nuclear fusion rection, if the energy is absorbed then (1) BE(product) > BE(reactant) (2) BE(product) < BE(reactant) (3) None of the above

Discussion

17.	30.which of the following has more ionisation energy li ,Mg,Sc and Ti
Answer» 30.which of the following has more ionisation energy li ,Mg,Sc and Ti

Discussion

18.	Assertion:- Gauss law is a general law of electrostatics. Reason:- The gravitational flux over any closed surface be a negative quantity (1)A (2)B (3)C (4)D
Answer» Assertion:- Gauss law is a general law of electrostatics. Reason:- The gravitational flux over any closed surface be a negative quantity (1)A (2)B (3)C (4)D

Discussion

19.	If a ray of light goes from a denser medium to a rarer medium, will it bend towards the normal or away from the normal ?
Answer» If a ray of light goes from a denser medium to a rarer medium, will it bend towards the normal or away from the normal ?

Discussion

20.	A battery and three lamps are connected as shown Which of the following statements about the currents at X, Yand Z is correct? (a) The current at Z is greater than that at Y (b) The current at y is greater than that at Z (c) The current at X equals the current at Y (d) The current at X equals the current at Z
Answer» A battery and three lamps are connected as shown Which of the following statements about the currents at X, Yand Z is correct? (a) The current at Z is greater than that at Y (b) The current at y is greater than that at Z (c) The current at X equals the current at Y (d) The current at X equals the current at Z

Discussion

21.	In an ammeter 0.2% of main current passes through the Galvanometer resistance of galvanometer is G the resistance of ammeter will be
Answer» In an ammeter 0.2% of main current passes through the Galvanometer resistance of galvanometer is G the resistance of ammeter will be

Discussion

22.	What is Coni’s method?
Answer» What is Coni’s method?

Discussion

23.	Choose the correct circuit diagram which can verify Ohm's law.
Answer» Choose the correct circuit diagram which can verify Ohm's law.

Discussion

24.	Describe some experiment to show that the magnetic field is associated with an electric current.
Answer» Describe some experiment to show that the magnetic field is associated with an electric current.

Discussion

25.	(a) Name one factor on which the frequency of sound emitted due to vibrations in an air column depends. (b) How does the frequency depend on the factor stated in part (a).
Answer» (a) Name one factor on which the frequency of sound emitted due to vibrations in an air column depends. (b) How does the frequency depend on the factor stated in part (a).

25.

(a) Name one factor on which the frequency of sound emitted due to vibrations in an air column depends. (b) How does the frequency depend on the factor stated in part (a).

Answer»

(a) Name one factor on which the frequency of sound emitted due to vibrations in an air column depends.

(b) How does the frequency depend on the factor stated in part (a).

Discussion

26.	Find the volume of a sphere whose radius is 0.63 m [Assume π=227]
Answer» Find the volume of a sphere whose radius is 0.63 m $[A s s u m e π = \frac{22}{7}]$

Discussion

27.	A conductor depicted as AB is moving towards you, out of the plane, with two magnets kept as shown below. (G - galvanometer) Select the correct option regarding polarity of the magnets and the deflection of the galvanometer.
Answer» A conductor depicted as AB is moving towards you, out of the plane, with two magnets kept as shown below. (G - galvanometer) Select the correct option regarding polarity of the magnets and the deflection of the galvanometer.

Discussion

28.	Which of the following statement is incorrect regarding refractive index?
Answer» Which of the following statement is incorrect regarding refractive index?

Discussion

29.	Question 3 (e)State whether the following statement is true or false.The lower the frequency of vibration, the higher is the pitch.
Answer» Question 3 (e) State whether the following statement is true or false. The lower the frequency of vibration, the higher is the pitch.

Discussion

30.	A certain string will resonate to several frequencies the lowest of which is 200 cps what are the next three higher frequencies to which it resonates
Answer» A certain string will resonate to several frequencies the lowest of which is 200 cps what are the next three higher frequencies to which it resonates

Discussion

31.	13 What is Inert pair effect and Screening constant?
Answer» 13 What is Inert pair effect and Screening constant?

Discussion

32.	What is the nuclear fuel in the sun ? Describe the process by which energy is released in the sun. Write the equation of the nuclear reaction involved.
Answer» What is the nuclear fuel in the sun ? Describe the process by which energy is released in the sun. Write the equation of the nuclear reaction involved.

Discussion

33.	What is meant by satellite launch vehicles?
Answer» What is meant by satellite launch vehicles?

Discussion

34.	Which uses more enegry : a 250 W TV set in 1 hour or a 1200 W toaster in 10 minutes ?
Answer» Which uses more enegry : a 250 W TV set in 1 hour or a 1200 W toaster in 10 minutes ?

Discussion

35.	In homogeneous catalysis, the reactants, products and catalyst should be in the ___
Answer» In homogeneous catalysis, the reactants, products and catalyst should be in the ___

Discussion

36.	102.Which gate is obtained when two inputs of NOR gate are joined together?
Answer» 102.Which gate is obtained when two inputs of NOR gate are joined together?

Discussion

37.	A monochromatic beam of light passes from an optically denser medium into an optically rarer medium. As a result, ____.
Answer» A monochromatic beam of light passes from an optically denser medium into an optically rarer medium. As a result, ____.

Discussion

38.	Draw a V-I graph for a conductor at two different temperatures. Waht conclusion do you draw from your graph for the variation of resistance of the conductor with temperatue?
Answer» Draw a V-I graph for a conductor at two different temperatures. Waht conclusion do you draw from your graph for the variation of resistance of the conductor with temperatue?

Discussion

39.	If the length of copper wire is made twice by stretching, its resistance will :
Answer» If the length of copper wire is made twice by stretching, its resistance will :

Discussion

40.	How can a guitar produce sounds of different frequencies?
Answer» How can a guitar produce sounds of different frequencies?

Discussion

41.	The recoil velocity of a gun of 5 kg, if a bullet of 25 g acquires a velocity of 500 ms−1 after firing from the gun, is .
Answer» The recoil velocity of a gun of $5 k g$ , if a bullet of $25 g$ acquires a velocity of $500 m s^{- 1}$ after firing from the gun, is .

Discussion

42.	Prove 2(f) of lense is twice to that of (f) of lense.
Answer» Prove 2(f) of lense is twice to that of (f) of lense.

Discussion

43.	Define magnetic induction
Answer» Define magnetic induction

Discussion

44.	From a machine gun mass of bullet 40g are ejected at the rate of 1200metre/sec .By applying maximum force of 144 Newton a person can hold the machine gun .What is the maximum number of bullets he can eject per second ?
Answer» From a machine gun mass of bullet 40g are ejected at the rate of 1200metre/sec .By applying maximum force of 144 Newton a person can hold the machine gun .What is the maximum number of bullets he can eject per second ?

Discussion

45.	what is the correct electronic configration of the central atom in K4[Fe(CN)6] based on crystal field theory?
Answer» what is the correct electronic configration of the central atom in K4[Fe(CN)6] based on crystal field theory?

Discussion

46.	If one ampere of current flows through a conductor, then the number of electrons flowing across any cross-section of the conductor in 4 seconds is:Charge on each electron is 1.6×10−19C
Answer» If one ampere of current flows through a conductor, then the number of electrons flowing across any cross-section of the conductor in 4 seconds is: Charge on each electron is $1.6 \times 10^{- 19} C$

Discussion

47.	An object is placed at the following distances from a concave mirror of focal length 15 cm, turn by turn : (a) 35 cm (b) 30 cm (c) 20 cm (d) 10 cm Which position of the object will produce : (i) a magnified real image ? (ii) a magnified virtual image ? (iii) a diminished real image ? (iv) an image of same size as the object ?
Answer» An object is placed at the following distances from a concave mirror of focal length 15 cm, turn by turn : (a) 35 cm (b) 30 cm (c) 20 cm (d) 10 cm Which position of the object will produce : (i) a magnified real image ? (ii) a magnified virtual image ? (iii) a diminished real image ? (iv) an image of same size as the object ?

Discussion

48.	The formula of the compound is A_2B_5 . The number of electrons in the outermost orbits of A and B respectively are (1) 6 and 3 (2) 5 and 6 (3) 5 and 2 (4) 2 and 3
Answer» The formula of the compound is A_2B_5 . The number of electrons in the outermost orbits of A and B respectively are (1) 6 and 3 (2) 5 and 6 (3) 5 and 2 (4) 2 and 3

Discussion

49.	50. In the circuit shown the cells A and B have negligible resistance. For Va =12V, R1=500ohm and R=100ohm the galvanometer G shows no deflection. The value of Vb is
Answer» 50. In the circuit shown the cells A and B have negligible resistance. For Va =12V, R1=500ohm and R=100ohm the galvanometer G shows no deflection. The value of Vb is

Discussion

50.	Find the DE of the family of all parabolas whose axis is x-axis.
Answer» Find the DE of the family of all parabolas whose axis is x-axis.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A mosquito flaps its long front wings up to 600 times per second, what is the time period of the flaps?

what is the beat frequency heard if tuning forks of frequencies 200,201,204,206 hz are sounded together ? (1) 2 (2) 4 (3) 6 (4) 1

Three resistors each of 4 Ohm are connected in the form of an equilateral triangle. The effective resistance across any two corners is:

a ray of light strikes a glass plate at an angle 60^°. if the reflected and refracted rays are perpendicular to each other, the index of refraction of glass i

A diver in a swimming pool wants to signal his distress to a person lying on the edge of the pool by flashing his water proof flash light.

ntIf 4 A current is passed through an aqueous FeCl3 sol how much time will be taken to deposit 2.5 g of Fe A 15 min B 54 min C 100 min D 3230 minn

Light is incident from air on oil at an angle of 30∘. After moving through oil-1 and another medium; oil-2, it enters glass and then it enters the water. If the refractive indices of glass and water are 1.5 and 1.3, respectively, find the angle which the ray makes with normal in water.

what is the phase difference between two waves of equal amplitude having same angular frequency with equal wavelength, to give i. maximum amplitude ii.minimum amplitude

Why is speed of light independent of wavelength in vacuum but not in other media?

A postage stamp kept below a rectangular glass slab of refractive index 1.5 when viewed from vertically above it appears to be raised by 7.0mm calculate the thickness of the glass slab

Distinguish between convex lens and concave lens.

Mass of a body is tripled and its velocity is halved. Its momentum will

Q 17/30 If a body is thrown at speed of triple as thatof escape speed (ve) from earth's surface, then at whatspeed it will move in interstellar space?2/2VVe3 v

One surface of a biconvex lens having focal length 40 cm is silvered. The radius of the curvature of the other surface is 60 cm. At what distance from the silvered lens should an object be placed to obtain a real image magnified three times? (μg=1.5)

In a nuclear fusion rection, if the energy is absorbed then(1) BE(product) > BE(reactant)(2) BE(product) < BE(reactant)(3) None of the above

30.which of the following has more ionisation energy li ,Mg,Sc and Ti

Assertion:- Gauss law is a general law of electrostatics. Reason:- The gravitational flux over any closed surface be a negative quantity (1)A (2)B (3)C (4)D

If a ray of light goes from a denser medium to a rarer medium, will it bend towards the normal or away from the normal ?

In an ammeter 0.2% of main current passes through the Galvanometer resistance of galvanometer is G the resistance of ammeter will be

What is Coni’s method?

Choose the correct circuit diagram which can verify Ohm's law.

Describe some experiment to show that the magnetic field is associated with an electric current.

(a) Name one factor on which the frequency of sound emitted due to vibrations in an air column depends. (b) How does the frequency depend on the factor stated in part (a).

Find the volume of a sphere whose radius is 0.63 m [Assume π=227]

A conductor depicted as AB is moving towards you, out of the plane, with two magnets kept as shown below. (G - galvanometer) Select the correct option regarding polarity of the magnets and the deflection of the galvanometer.

Which of the following statement is incorrect regarding refractive index?

Question 3 (e)State whether the following statement is true or false.The lower the frequency of vibration, the higher is the pitch.

A certain string will resonate to several frequencies the lowest of which is 200 cps what are the next three higher frequencies to which it resonates

13 What is Inert pair effect and Screening constant?

What is the nuclear fuel in the sun ? Describe the process by which energy is released in the sun. Write the equation of the nuclear reaction involved.

What is meant by satellite launch vehicles?

Which uses more enegry : a 250 W TV set in 1 hour or a 1200 W toaster in 10 minutes ?

In homogeneous catalysis, the reactants, products and catalyst should be in the ___

102.Which gate is obtained when two inputs of NOR gate are joined together?

A monochromatic beam of light passes from an optically denser medium into an optically rarer medium. As a result, ____.

Draw a V-I graph for a conductor at two different temperatures. Waht conclusion do you draw from your graph for the variation of resistance of the conductor with temperatue?

If the length of copper wire is made twice by stretching, its resistance will :

How can a guitar produce sounds of different frequencies?

The recoil velocity of a gun of 5 kg, if a bullet of 25 g acquires a velocity of 500 ms−1 after firing from the gun, is .

Prove 2(f) of lense is twice to that of (f) of lense.

Define magnetic induction

From a machine gun mass of bullet 40g are ejected at the rate of 1200metre/sec .By applying maximum force of 144 Newton a person can hold the machine gun .What is the maximum number of bullets he can eject per second ?

what is the correct electronic configration of the central atom in K4[Fe(CN)6] based on crystal field theory?

If one ampere of current flows through a conductor, then the number of electrons flowing across any cross-section of the conductor in 4 seconds is:Charge on each electron is 1.6×10−19C

The formula of the compound is A_2B_5 . The number of electrons in the outermost orbits of A and B respectively are (1) 6 and 3 (2) 5 and 6 (3) 5 and 2 (4) 2 and 3

50. In the circuit shown the cells A and B have negligible resistance. For Va =12V, R1=500ohm and R=100ohm the galvanometer G shows no deflection. The value of Vb is

Find the DE of the family of all parabolas whose axis is x-axis.