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.
14 A
12 A
10 A
8 A
Correct answer is B
1/R = 1/4 + 1/4 + 1/4 = 3/4
R = 4/3
I = V/R
= | 16 |
4/3 |
= | 16 x 3 |
_4 |
The diagram above shows a balanced metre bridge, the value of x is
75.0 cm
66.7 cm
33.3 cm
25.0 cm
Correct answer is C
1/R = 1/8 + 1/8 = 2/8
∴ R = 4Ω
l/l1 = R/R1
(x)/(100-x) = 4/8
4(100-x) = 8x
400-4x = 8x
400 = 8x + 4x = 12x
x = 400/12 = 33.3cm
2.52 x 10-6J
6.90 x 10-6J
2.52 x 10-4J
6.90 x 10-4J
Correct answer is C
C = C1 + C2 + C3
= 2 + 4 + 8 = 14μF
V = 6V
Energy = 1/2CV2
1/2 x 14 x 10-6 x 62
= 2.52 x 10-4 J