Question

What is the resistance of an electric lamp if lamp uses 20a when connected to a 220v line

Answer 1

required resistance be 11 ohm

Answer 2

Answer:

Explanation:

Given :-

Current, I = 20 Ampere

Voltage, V = 220 V

To Find :-

Resistance, R = ??

Formula to be used :-

From the Ohm's Law

V = IR

R = V/I

Solution :-

Putting all the values, we get

R = V/I

R = 220 V / 20 A

R = 11 Ω

Hence, the resistance of an electric lamp is 11 Ω.

Extra Information :-

Ohm's Law :

According to ohm's law, at a constant temperature , the current flowing through a conductor is directly proportional to the potential difference across the conductor.