Question

a 10ohms resistor s connected in series with a torch bulb and a 3v battery if voltage across the torch bulb is 1v find its resistance

Answer 1

Answer:

5 ohms

Explanation:

In a series connection,

net voltage of the circuit = sum of voltages across all resistors

Let voltage across 10 ohm resistor be V

3=1+V

V=2V

the current across 10 ohm resistor = V/R = 2/10 = 0.2A

In a series connection, the current across all resistors are same.

So current across bulb = 0.2A

Resistance of bulb = V/I = 1/0.2 = 5 ohms

(p.s. please mark my answer brainliest)