ECAT Pre Computer Science Chapter 19 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 19 Dawn of Modern Physics

Try The MCQ's Test For ECAT Physics Chapter 19 Dawn of Modern Physics

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ECAT Physics Chapter 19 Dawn of Modern Physics

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Question # 1

The concept of direction is purely:

Question # 2

There is no way to detect:

Question # 3

The energy of the 4th orbit in hydrogen atom is

Question # 4

The positron was discovered by:

Question # 5

The way through which electromagnetic radiations or photons interact with matter depends upon their:

Question # 6

The special theory of relativity treats problems invoving

Question # 7

The general theory of relativity treats problems involving

Question # 8

The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of

Question # 9

The stopping voltage for a certain metal is 100 volts, then the work function for the cathode plate is

Question # 10

Momentum is a parameter associated with

Question # 11

If you are moving at relativistic speed between two points that are a fixed distance apart, then the distance between the two points appers

Question # 12

At the temperature, a body emits radiation which is principally

Question # 13

Victor de-Brogile received the Nobel prize in physics in

Question # 14

Pair production is the phenomenon in which

Question # 15

Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in

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ECAT Physics Chapter 19 Important MCQ's

Sr.# Question Answer
1 The general theory of relativity treats problems involving
A. inertial frame of references
B. accelerating frame of references
C. both of these
D. none of these
2 the symbol to be used in relativity problems denotes:
A. Dilated time
B. Proper time
C. Life time
D. Half time
3 An intertial frame of reference is a frame of reference which is
A. at rest
B. moving with uniform velocity
C. either at rest or moving with uniform velocity
D. none of these
4 The concept of direction and position are purely
A. absolute
B. relative
C. absolute or relative
D. none of these
5 Max Planck received the Nobel Prize for his discovery of energy quants in:
A. 1718 AD
B. 1918 AH
C. 1818 AD
D. 1918 AD
6 At the temperature, a body emits radiation which is principally
A. of long wavelengths in the visible region
B. of long wavelengths in the invisible infrared region
C. of short wavelength in invisible ultraviolet region
D. none of these
7 The positron was discovered by:
A. In cosmic radiation
B. In 1932
C. By Carl Anderson
D. All above
8 When a platinum wire is heated, it appears yellow at
A. 1600°C
B. 900°C
C. 1100°C
D. 1300°C
9 A particle of mass 5.0 mg moves with a speed of 8.0 m/s. Its de-Brogile wavelength is
A. 1.66 m
B. 1.66 x 10-10m
C. 1.66 x 10-29cm
D. 1.66 x 10-29m
10 When a platinum wire is heated, it appears orange red at
A. 500°C
B. 900°C
C. 1100°C
D. 1300°C

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