PPSC Physics Topic 7 MCQ Test With Answer

Prepare Modern Physics and all other important topics with PPSC Physics online test. Modern Physics is a term that is used to describe all the discoveries and observations that made physicists rethink their understanding of Physics in the 19th and 20th centuries. In this day and age, one can't study Physics without having a firm understanding of concepts of Modern Physics. That’s why seekers for PPSC Physics jobs need to understand the subject of Modern Physics. Examiners ask many questions from this topic in the PPSC Physics test.

To make the PPSC exam preparation easier for you, team IlmKiDunya.com has created the PPSC Physics online test portal. On this page, you can attempt the PPSC online test MCQs about Modern Physics. Many students complain that they don’t find information about the PPSC Physics exam preparation. We at IlmKiDunya.com bring PPSC online test to your fingertips so you can prepare quickly for the test.

MCQ's Test For PPSC Physics Topic 7 Modern Physics

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PPSC Physics Topic 7 Modern Physics

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Question # 1

The usefulness of X rays is largely due to their

Question # 2

Base current of a transistor is 1 mA and collector current is 99 mA What is emitter current.

Question # 3

The constant lamda is called the.

Question # 4

Which of the following is formed by decay of a free neurton.

Question # 5

Which temperature is required for the fusion of two nuclides.

Question # 6

Which of the following configuration of BJTs gives both voltage gain and current gain.

Question # 7

The input resistance of a JFET is of the order of.

Question # 8

Which one among these contacts in a transistor is non rectifying.

Question # 9

Which of the following detectors can count fast and operate at low voltage.

Question # 10

In a transistor which one is very thin.

Question # 11

The unit generally used for measuring astronomical distances is.

Question # 12

Both xenon and cesium each have

Question # 13

X-rays are absorbed maximum by

Question # 14

Which of the following can be used as an arrester in a nuclear reactor.

Question # 15

Which of the following is required for maintaining sustained chain reaction.

Question # 16

The half life of a radioactive substance is 6 years What is the time taken by 12 g of this substance to decay completely.

Question # 17

The Compton effect in X-rays proves that

Question # 18

Tracer techniques make use of.

Question # 19

If we use two diodes and a centre tapped transformer we eill get

Question # 20

Which one of the following spectra series is in the ultraviolet region.

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 The half life of uranium -238 is
A. 1620 years
B. 4.5 x 109 years
C. 3-8 days
D. 23.5 minutes
2 Which one of the following gates in a a universal gate.
A. OR
B. AND
C. NOT
D. NAND
3 In potential for the material of cathode pure metals are rarely used because of their
A. Low reflecting power
B. High reflecting power
C. Low resolving power
D. High resolving power
4 What is the relativistic version of the Schrodinger equation.
A. Klein Gordon equation
B. Laplace equation
C. Quadratic equation
D. Binomial equation.
5 In heavy elements of the periodic table the number of neutrons than protons are.
A. Lesser
B. Greater
C. Equal
D. Undetermined
6 The absorption of X-rays in a given material follows.
A. A parabola path
B. Is straight line
C. An exponential curve
D. A circle
7 The half life of a radioactive substance depend on.
A. Pressure
B. Temperature
C. Amount of substance
D. No external influences
8 Which type of amplifier causes minimum drain of power supply.
A. Class -A
B. Class -B
C. Class-C
D. Class -AB
9 If the base emitter junction is forward biased and base collector junction is reverse biased the BJT is in.
A. cut of mode
B. Amplification mode
C. Saturation mode
D. Inversion mode
10 Which given quantity remains the same in isotones.
A. Mass number
B. Atomic number
C. Number of neutrons
D. Number of protons

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