Question

calculate the resistance of an electric bulb which allows 10a current when connected to 220v power source

Answer 1

Resistance, R = ? Current, = 10 A

Voltage, V = 220 volts.

According to Ohm's law

V = IR

or R = V/I = 220/10  = 22.

Answer 2

Given :-

• Current (I) = 10A
• Potential Difference (V) = 220V

To Find :-

• Resistance (R)

Solution :-

On using OHM's Law , we get,

• Potential Difference = Current * Resistance

• V = I R

On putting above given values in it, we get,

↣ 220 = 10 x R

↣ R = 220/10

↣ R = 22 ohm

Hence,

• Resistance (R) = 22ohm

OHM's Law :- Ohm's law states that the current through a conductor is proportional to the voltage across the conductor.

↣ V = I R

where V is the voltage across the conductor

where V is the voltage across the conductor I is the current flowing through it.

where V is the voltage across the conductor I is the current flowing through it.R is the resistance through conductor.