Question

Draw a circuit diagram describing how 6 torch cells should be connected to a bulb and a switch to obtain effective voltage of 9 volt

Answer 1

circuit diagram describing how 6 torch cells should be connected to a bulb and a switch to obtain effective voltage of 9 volt

1. We know a typical torch cell is of 1.5V rating.

2. We have to use these torch cell in order to get a 9V effective voltage.

3. If we connect these cell in series, we know the effective resistance is given by Reff=r1+r2+r3+....

4. So taking r1=r2=r3=r4=r5=r6=1.5

Reff=1.5+1.5+1.5+1.5+1.5+1.5=9V

5. The circuit will look like in the fig.