Question
Question: Voltmeters V<sub>1</sub> and V<sub>2</sub> are connected in series across a dc line. V<sub>1</sub> r...
Voltmeters V1 and V2 are connected in series across a dc line. V1 reads 80 V and has per volt resistance of 200Ω. V2 has a total resistance of 32 kΩ. The line voltage is-
A
120 V
B
160 V
C
220 V
D
240 V
Answer
240 V
Explanation
Solution
V = iR
V ∝ R
V1 = 80 V
∴ R1 = 80 × 200 = 16000 Ω
R2 = 32000 Ω
∴ V2 = 160 V
∴ V = V1 + V2 = 80 + 160 = 240 Volt