Question

Section A
1. If the current of 0.15 A flow through a wire for 60 sec then find the amount of charge that flows through
the circuit.
2. If in an electric circuit the current passing through a conductor is doubled, What will be the change in
heat produced?
3. What is the resistance of ideal Voltmeter? How much work is work is done in moving a charge of 4 C
from a point of 220 V to another point of 230 volt?
4. What do you understand by the statement that the potential difference between two points is 1 volt?
5. Determine the value of minimum resistance that can be made using 6 resistors each If ¼ ohm.

Answer 1

Explanation:

1. I = 0.15 A

t = 60 sec

charge(Q)=It = 9 C

2. heat produced directly proportional to current .so heat will be produced 2 times more.

3.An ideal voltmeter have infinite resistance.

Q =4C

V = 230 -220 =10v

Work =VQ =10×4= 40J

4.When potential difference between two point is 1v then 1 J work is done to carry 1C charge.

5. minimum value of resistance will come when all the resistors are in series.

resistance in such case is

= 6 × 1/4 =1.5 ohm