# Forum

The resistors R1, R...

Clear all

# The resistors R1, R2, R3 and R4 in the figure given below are all equal in value.

0
Topic starter

The resistors R1, R2, R3 and R4 in the figure given below are all equal in value.

What would you expect the voltmeters A, B and C to read assuming that the connecting wires in the circuit have negligible resistance?
Topic Tags
0

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

Total current in the circuit, I = $$\frac{V}{R}$$

= $$\frac{12}{4R}$$ = $$\frac{3}{R}$$

Reading of voltmeter A = Voltage across R1 = I x R1 = $$\frac{3}{R} \times R$$ = 3V

Reading of voltmeter A = Voltage across R2 = I x R2 = $$\frac{3}{R} \times R$$ = 3V

Reading of voltmeter C = Voltage across the series combination of R3 and R4 = I x (R3 + R4)

= $$\frac{3}{R}$$ x 2R

= 6V

Share: