Question

find R1,R2,R3,R4 if each resister is of 7 ohm and bat​

Answer 1

$\huge\mathcal\pink{Answer:−}$

Req = R + R + R + R = 4R ohm

Total current in the circuit, I = V/R = 12/4R = 3/R

Reading of voltmeter A = Voltage across R1 = I x R1 = 3/R x R = 3V

Reading of voltmeter B= Voltage across R2 = I x R2 = 3/R x R = 3V

Reading of voltmeter C= Voltage across the series combination of R3 and R4 = I x (R3+R4) = 3/R x 2R = 6V