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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