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

There is no way to detect:

Question # 2

Victor de-Brogile received the Nobel prize in physics in

Question # 3

The Nobel Prize on the explanation of photoelectric effect was awarded to:

Question # 4

The photoelectric effect, the maximum energy of photoelectrons depends on the

Question # 5

Newton's law of motion do not hold in

Question # 6

An intertial frame of reference is a frame of reference which is

Question # 7

Max Planck received the Nobel Prize for his discovery of energy quants in:

Question # 8

If the radius of first orbit of hydrogen atom is 0.53° A the radius of second orbit will be

Question # 9

The inside cavity of the black body is

Question # 10

When a platinum wire is heated, it appears dull red at about

Question # 11

Which of the following is not an example of intertial frame

Question # 12

As the light shines on the metal surface, the electrons are ejected

Question # 13

Momentum is a parameter associated with

Question # 14

When platinum wire is heated, it appears cherry red at

Question # 15

Electromagnetic -radiation means:

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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 Compton was awarded Nobel prize in physics in
A. 1921
B. 1923
C. 1925
D. 1927
3 S.I. unit of planks constant is
A. J-s-1
B. J.s
C. J.s-2
D. J.s2
4 The idea of quantization of energy was proposed by:
A. Einstein
B. Max.Planck
C. Maxwell
D. Bohr
5 As the light shines on the metal surface, the electrons are ejected
A. slowly
B. instantaneously
C. either of these
D. none of these
6 The stopping voltage for a certain metal is 100 volts, then the work function for the cathode plate is
A. 100 J
B. 1.6 x 10-17J
C. 100 eV
D. 1.6 x 10-17eV
7 The concept of direction and position are purely
A. absolute
B. relative
C. absolute or relative
D. none of these
8 Max plank founded a mathematical model resulting in an equation that describes the shape of observed black body radiation curves exactly, in
A. 1890
B. 1895
C. 1900
D. 1905
9 According to the special theory of relativity
A. mass and energy are same entities
B. mass and energy are same entities but interconverible
C. mass and energy are different entities but interconverible
D. mass and energy are different entities but non-interconveritble
10 The special theory of relativity is based on:
A. Four postulates
B. Three postulates
C. Two postulates
D. One postulate

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