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.
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.
string theory
particle theory
group theory
band theory
Correct answer is D
No explanation has been provided for this answer.
A radioactive element has a half life of 4 days. The fraction that has decayed in 16 days is?
(15)/16
(1)/16
(3)/4
(1)/4
Correct answer is B
16 days = 4 half lives.
The fraction left 16 days = after 4 half live, = (1/2)4 = (1)/16.
One of the properties of gamma rays is that they are?
neutral
massive
positively charged
negatively charged
Correct answer is A
No explanation has been provided for this answer.
The battery connection that permits current to flow across a p-n junction is called?
reverse baised
forward baised
amplification
rectification
Correct answer is B
No explanation has been provided for this answer.
The process through which free electrons leave the surface of hot metal is known as?
photon emission
photo emission
thermionic emission
electron emission
Correct answer is C
No explanation has been provided for this answer.