physics

Which of the following materials is used to control the rate of neutron production in a nuclear reactor?

A. boron rods B. concrete shield C. graphite rods D. uranium rods Correct Answer: Option A A. boron rods

6 years ago

Which of the following is usually used to cause fission in an atomic reactor?

A. Alpha particles B. beta particles C. electrons D. Neutrons Correct Answer: Option D D. Neutrons

6 years ago

If a radioactive atom emits a beta particle, Its mass number.

A. increases by one B. remains the same C. decreases by one D. increases by two Correct Answer: Option B…

6 years ago

Calculate the inductance L, of the coil in the circuit diagram shown below.

A. 3.8H B. 0.6H C. 0.4H D. 0.2H Correct Answer: Option B B. 0.6H Explanation XL = V/I=240/2=120Ω L =…

6 years ago

A freely-suspended magnet swinging in a horizontal plane comes to rest with its axis pointing approximately

A. north-south B. south-west C. north-east D. south-east Correct Answer: Option A A. north-south

6 years ago

The lead-acid accumulator consists of a?

A. lead as the positive electrode B. lead oxide as the negative electrode C. hydrochloric acid as the electrolyte D.…

6 years ago

Local action is normally prevented in a simple electric cell by?

A. introducing an oxidizing agent in the acid B. not drawing current continuously for a long period C. amalgamating the…

6 years ago