(33) The half life of a radioactive element is 8-days. How long it take to reduce it from 10 mg to 5 mg?
a. 4 days
b. 12 days
c. 16 days
d. 8 days
e. None of these
(34) The term ‘Blue Shift’ is used to indicate:
a. Doppler effect in which an object appears bluer when it is moving towards the observer or observer is moving towards the object.
b. Turning a star from white to blue
c. In future sun would become blue
d. Black hole was blue at its start
e. None of these
(35) Kilowatt-hour is a unit of:
a. Power
b. Electric Current
c. Energy
d. Time
e. None of these
(36) Fuel used in a Fast Breeder Reactor is:
a. Uranium Oxide
b. Uranium Plutonium carbide
c. Uranium Plutonium Oxide
d. Uranium thorium Oxide
e. None of these