Question 1

Which substance is used as moderator to slow down fast neutrons in a nuclear reactor?

Accepted Answer

Heavy water and Graphite

Question 2

Which unit is used to measure electric charge?

Accepted Answer

Coulomb

Question 3

Which option correctly matches distance, electric charge, electric current and energy with their SI units?

Accepted Answer

Distance-meter, charge-coulomb, current-ampere, energy-joule

Question 4

In winter touching iron feels colder than wood at same room temperature. Why?

Accepted Answer

Iron conducts heat faster away from hand so feels colder

Question 5

How is the energy of light conserved during transmission?

Accepted Answer

As electromagnetic waves

Question 6

Under whose direction was the first nuclear reactor built?

Accepted Answer

Enrico Fermi

Question 7

Which quantity includes both magnitude and direction?

Accepted Answer

Velocity

Question 8

Candela is the SI unit of which quantity?

Accepted Answer

Luminous intensity

Question 9

When water is heated from 0°C to 10°C what happens to its volume?

Accepted Answer

Volume first decreases then increases

Question 10

What is the Photon Theory of light also known as?

Accepted Answer

Light consists of energy packets called photons (quanta) that travel as particles

Science One Liner Questions with Answers

Candela is the SI unit of which quantity?