Question

c) How much current
from 220v source if the resistance of the
will an electrie bull drown
bull filament es
current will on electric heater coil drawn from
1200.source b if the res of heater coil
is 100oms
​

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}I=

R

V

Plug the given values in the above formula:

I=\frac{220 \ V}{1200 \ \Omega}=0.183 \ AmpereI=

1200 Ω

220 V

=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}I=

R

V

Plug the given values in the formula:

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

100 Ω

220 V

=2.20 Ampere