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.
Pure silicon can be converted to a p-type by adding a controlled amount of
trivalent atoms
tetravalent atoms
pentavalent atoms
hexavalent atoms
Correct answer is A
No explanation has been provided for this answer.
| 23 | Na + X → | 20 | F + | 4 | He | |
| 11 | 9 | 2 |
Alpha
Beta
Neurons
Gamma
Correct answer is C
The particle in the reaction is neutron
| 23 | Na + | 1 | n → | 20 | F + | 4 | He |
| 11 | 0 | 9 | 2 |
1Ω
2Ω
3Ω
4Ω
Correct answer is B
p>IR = 0.6 X I ( R + r )
I X 3 = 0.6 X I ( 3 + r )
3I / 0.6I = 3 + r
5 = 3 + r
r = 2 ohms
The electromagnetic wave that can produce a heating effect on the environment is
x -rays
ultraviolet rays
infrared rays
gamma rays
Correct answer is B
No explanation has been provided for this answer.
Both X and Y are negative
Both X and Y are positive
X is positive and Y is negative
X is negative and Y is positive
Correct answer is B
No explanation has been provided for this answer.