Question

Three resistors are connected to a 6 V battery as shown in the figure given below:

Calculate:
(i) the equivalent resistance of the circuit.
(ii) total current in the circuit.
(iii) potential difference across the 7.2 Ω resistor.

Answer 1

(i) `1/"R"_1 = 1/8 + 1/12`

`= (3 + 2)/24 = 5/24`

R₁ = 4.8 ohm.

Total Resistance = 4.8 + 7.2 = 12 ohm

(ii) V = IR

6 = I × 12

I = 0.5 Amp.

(iii) V = IR

= 0.5 × 7.2

= 3.6 Volt.