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How much current will an electric bulb draw from a 220 volt source ,if the resistance of the bulb pilament is 1000ohm

Posted by Korean Girl Kumkum 5 years, 9 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 9 months ago

(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:

{tex}I=\frac{V}{R}{/tex}

Plug the given values in the above formula:

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

(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:

{tex}I=\frac{V}{R}{/tex}

Plug the given values in the formula:

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

0Thank You

Deepti Gupta ❣️❣️ 5 years, 9 months ago

0.22 A

0Thank You

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CBSE > Class 10 > Science