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Physics Quiz 7

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Physics Quiz 7

1 / 50

Thermions are________________?

2 / 50

A 100?F capacitor with a 12V source in series having frequency 50Hz will offer a capacitive reactance of about______________?

3 / 50

When two bodies move toward each other with constant speeds the distance between them decreases at the rate of 6m / sec. If they move in the same direction the distance between them increases at the rate of 4m/sec. Then their speeds are________________?

4 / 50

When one mirror of a Michelson Interferometer is moved a distance of 0.5 mm we observe 2000 fringes. What will be wavelength of light used ?

5 / 50

Distance covered by a freely falling body in 2 seconds will be__________________?

6 / 50

A 10? electric heater is connected to a 220V 50Hz mains supply. What is the peak value of the potential difference across the heater element ?

7 / 50

Which phenomena can be applied to estimate the velocity of star with respect to earth ___________________?

8 / 50

Errors in the transmission of power through optic fiber can be minimized by using a______________?

9 / 50

In liquids and gases the current is due to the motion________________?

10 / 50

Gas molecules of different masses in the same container have the same average transnational kinetic energy which is directly proportional to their_____________?

11 / 50

The collision between two bodies be elastic if bodies are_________________?

12 / 50

To obtain an n-type semiconductor germanium crystal it must be doped with foreign atoms whose valency is_____________?

13 / 50

The density of human blood is nearly equal to____________?

14 / 50

Electromagnetic waves travel in free space with the speed of___________________?

15 / 50

The branch of physics which deals with the living things is called_________?

16 / 50

The flow of ideal fluid is always_______________?

17 / 50

X-rays are similar in nature to_______________?

18 / 50

If the density of atoms remain same along any direction in a crystal is called__________________?

19 / 50

The thrust on the rocket in the absence of gravitational force of attraction is__________________?

20 / 50

A completely filled band is called__________________?

21 / 50

Addition of vector obeys_____________?

22 / 50

Which one is not a type of dynamic equilibrium ?

23 / 50

In which quadrant, the only value of tan will be positive ?

24 / 50

When two identical traveling waves are superimposed, the velocity of the resultant wave__________________?

25 / 50

The force responsible for the vibratory motion of the simple pendulum is_________________?

26 / 50

One kilowatt hour is the amount of energy delivered during _______________?

27 / 50

In an angular motion, Newton?s second law of motion is_____________?

28 / 50

Boltzman constant K in terms of universal gas constant R and Avagadros number Na is give as_______________?

29 / 50

For a simple pendulu,m the restoring force is caused by________________?

30 / 50

Coefficient of viscosity of honey is greater than______________?

31 / 50

X-rays are diffracted by a crystal but not by a diffraction grating because_____________?

32 / 50

In the capacitive circuit the current___________________?

33 / 50

Which of the following branch of Physics deals with the internal structure of earth?

34 / 50

Unit of G is ______________?

35 / 50

A body is moving with uniform velocity. Its______________________?

36 / 50

Resistance of a wire on increasing its temperature will_________________?

37 / 50

We can produce heat by________________?

38 / 50

For what displacement the P.E becomes 1/4 of its maximum value ?

39 / 50

Which one of the following cannot be polarized ?

40 / 50

In the shadow of a ball the central portion appears bright that happens due to_________________?

41 / 50

In which quadrant the two rectangular components of a vector have same sign ?

42 / 50

Farad is the unit of___________?

43 / 50

Quality of X-rays depends upon ____________ A-filament current B-accelerating voltage C-material of the target ?

44 / 50

What are the dimensions of stress ?

45 / 50

The dimensions of the coefficient of viscosity are_____________?

46 / 50

The source of tidal energy is____________________?

47 / 50

One AMU is equal to__________________?

48 / 50

Which one of the following physical quantities does not have the dimensions of force per unit area ?

49 / 50

The speed of light will be minimum while passing through ?

50 / 50

A current carrying conductor is placed in a uniform magnetic field parallel to it. The magnetic force experienced by the conductor is _____________________?

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