In the circuit shown below, the voltmeter reads 10 V.
(a) What is the combined resistance?
(b) What current flows?
(c) What is the p.d. across 2 Ω resistor?
(d) What is the p.d. across 3 Ω resistor?
When two resistors are connected in series, their resultant resistance is given by
R= R1+R2
Here R1 = 2 ohm
R2= 3 ohm
Combined resistance, R = R1 + R2 = 2+3 = 5 ohm
(b) We know that the current, I= V/R
Here R = 5 ohm
V= 10V
I = 10/5 = 2 amp
(c) Potential difference across 2ohm resistor V= I x R1= 2×2=4V
(d) Potential difference across 3ohm resistor V= I x R2= 2×3=6V