Question

How much current will an electric bulb draw from a 220 V source, if the resistance of the bulb filament is 1200 Ω? (b) How much current will an electric heater coil draw from a 220 V source, if the resistance of the heater coil is 100 Ω?

Answer 1

(a) Current = 0.183 Ampere

(b) Current = 2.20 Ampere

(a) Given:

For electric bulb:

Voltage = 220 V

Resistance = 1200 Ω

Solution:

According to Ohm's law, the current is ratio of voltage and resistance, hence, can be written as:

$I=\frac{V}{R}$

Plug the given values in the above formula:

$I=\frac{220 \ V}{1200 \ \Omega}=0.183 \ Ampere$

(b) Given:

For electric heater coil:

Voltage = 220 V

Resistance = 100 Ω

Solution:

According to Ohm's law, the current is ratio of voltage and resistance hence can be written as:

$I=\frac{V}{R}$

Plug the given values in the formula:

$I=\frac{220 \ \mathrm{V}}{100 \ \Omega}=2.20 \ Ampere$

Answer 2

Answer: Hope this helps you

Explanation: