Top 500+ TRB Physics Question Paper with Answers - 1

Question: 1

A dynamo which is said to generate electricity actually acts as a

(A) Source of electrons

(B) Source of electric charge

(C) Source of ions

(D) Converter of energy

Ans: D

Converter of energy

Question: 2

Radioactivity was discovered by

(A) Henry Becquerel

(B) Bohr

(C) Madame Curie

(D) Rutherford

Ans: A

Henry Becquerel

Question: 3

The shortest unit of length is

(A) Angstrum

(B) Nanometer

(C) Micron

(D) Fermimeter

Ans: B

Nanometer

Question: 4

What is the function of a microphone?

(A) Convert electric signals to sound signals

(B) Covert sound signals to electromagnetic signals

(C) Convert sound signals to electric signals

(D) None of the above

Ans: C

Convert sound signals to electric signals

Question: 5

Which is not a refractory material to prevent oxidation?

(A) Asbestos

(B) Carbon

(C) Porcelain

(D) Fire clay

Ans: B

Carbon

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