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.
0.5 E
2.0 E
0.2 E
0.0 E
Correct answer is D
0.0 E since one of the electric fields points in the opposite direction (left)
4:1
2:1
1:4
1:2
Correct answer is D
Energy = 1/2CV2
∴Energy of P = 1/2 x 2 x V2 = V2
Energy of Q = 1/2 x 4 x V2 = 2V2
∴ P/Q = V2/2V2 = 1/2 => P:Q = 1:2
In the diagram above , the current I is
3/8
9/11
11/9
8/3
Correct answer is B
| I = | _E |
| R+r |
cosα / sinβ
sinα / sinβ
cosβ / sinα
sinβ / sinα
Correct answer is A
\(n = \frac{sin i}{sin r}\)
\(i = 90 - \alpha\)
\(\therefore n = \frac{sin 90 - \alpha}{sin \beta}\)
⇒ \(n = \frac{cos \alpha}{sin \beta}\)
60%
50%
40%
33%
Correct answer is B
Since the number of pulleys present is 6, it implies that the velocity ratio VR = 6
| ∴ efficiency = | M.A |
| |||
| V.R |