Question

2. The total resistance of the circuit
shown in diagram 3.41 is 5 12.
Calculate the value of X. [30]
utt
i Fign 3.41 ​

Answer 1

Answer:

(i) Applying Ohm's law,

let I be current 6 Ohm resistor

Then

I=4V/(6 Ohm +3 Ohm)=4/9 A

Current through both the resistors ohm and 3 ohm is 4/9 A as they are in series.

(ii) Let the current through 12 ohm and 3 ohm be I

then

I=4V/(12ohm+3ohm)=4/15A

Therefore potential difference across 12 ohm is given by

V=IR=4/15A x 12ohm=3.2V