nuclear physics and conductivity - Category wise Question and Answer Practice Test with Solutions

Question : 11 [PSC (Pre) 2015]

Assertion (A):
Copper rods are generally preferred to iron rods for making lightning conductors.
Reason (R):
Copper is better conductor of electricity than iron and is not easily oxidized under atmospheric conditions.
Code

a) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

b) (A) is true, but (R) is false

c) Both (A) and (R) are true and (R) is the correct explanation of (A)

d) (A) is false, but (R) is true

Question : 12 [PCS (Pre) 2012]

Photovoltaic cells are

a) Sulphur cells

b) Thermal cells

c) Solar cells

d) Molar cells

Question : 13 [UPPCS (Mains) 2005]

Among the following radiations, which has the highest energy?

a) Ultra-violet

b) X-ray

c) Visible

d) Infra-red

Question : 14 [IAS (Pre) 2001]

The half-life of a radioactive element is 5 years, then the fraction of the radioactive substance that remains after 20 years is

a) 1/8

b) 1/4

c) 1/2

d) 1/16

Question : 15 [IAS (Pre) 2017]

Consider the following statements.

1. The Nuclear Security Summits are periodically held under the aegis of the United Nations.
2. The International Panel on Fissile Materials is an organ of International Atomic Energy Agency.

a) Both 1 and 2

b) Only 2

c) Only 1

d) Neither 1 nor 2