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.
0.63A
0.50A
0.31A
0.22A
Correct answer is A
I = fn=16−2
I = vR+r=23+16=0.63A
6.0 x 10-5C
1.2 x 10-4C
2.4 x 10-4C
4.8 x 10-4C
Correct answer is C
C = C1+C2=2+2=4μF
but Q = CV
= 4 x 10−6 x 120
= 4.8 x 10−4
∴ Each of the capacitor has a charge of \frac{4.8 \times 10^{-4}}{2}
= 2.4 x 10^{-4} C
When two like charges are brought together, the potential energy of the system formed will
increase because work is done against the field
increase because work is done by the field
decrease because work is done by the field
decrease because work is done against the field
Correct answer is A
if two like charges are close together, they repel each other. moving them closer together requires working against repulsive force which increases the potential energy of the system.