Physics questions and answers

Physics Questions and Answers

If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.

1,771.

There is always an uncertainty involved in any attempt to measure the position and momentum of an electron simultaneously. This statement is known as the

A.

de Broglie's law

B.

Heisenberg uncertainty principle

C.

Franck-Hertz experimental law

D.

wave-particle paradox

Correct answer is B

No explanation has been provided for this answer.

1,773.

In a nuclear reactor, chain reactions result from the release of

A.

electrons

B.

photons

C.

neutrons

D.

protons

Correct answer is C

No explanation has been provided for this answer.

1,774.

The number of protons in an element increased by one after a radioactive decay. The element must have decayed by emitting

A.

a beta particle

B.

an alpha particle

C.

a gamma ray

D.

a neutron

Correct answer is A

No explanation has been provided for this answer.

1,775.

If a gas is excited by high voltage to produce a discharge and the light is examined in a spectrometer

A.

an explosion is observed

B.

the rainbow colours are seen

C.

an emission spectrum is observed

D.

dark lines are observed

Correct answer is C

No explanation has been provided for this answer.