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


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