A resistor of 6 ohm is connected in series with another resistor of 4 ohm. A potential difference of 20 V is applied across the combination. (a) Calculate the current in the circuit and (b) potential difference across the 6 ohm resistor.

(a) According to the question, calculate current in the circuit

R₁ = 6 ohm

R₂ = 4 ohm

R = R₁ + R₂

R = 6 + 4

R = 10 ohm

V = 20 V

I = V / R

I = 20 / 10

I = 2 A

(b) To find the voltage across the resister of 6 ohm.

R = 6 ohm

I = 2 A

V =?

V = IR

V = 6 × 2

V = 12 V