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## An electric circuit consists of a variable resistor connected to a source of constant potential difference. If the resistance of the resist

Question

An electric circuit consists of a variable resistor connected to a source of constant potential difference. If the resistance of the resistor is doubled, the current through the resistor is: a) halved doubled b) quartered c) quadrupled.

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Physics
3 years
2021-08-31T05:28:32+00:00
2021-08-31T05:28:32+00:00 1 Answers
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## Answers ( )

Answer:The correct option is a) halvedTherefore,Current through the resistor will be halved i.eExplanation:Given:

V = Voltage potential Difference constant

R’ = 2R

To Find:

Current, I’ = ? when R’ = 2R

Solution:

Ohm’s law:Ohm’s law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

Ohm’s law given as

Substituting the R’ = 2R , new current we get

Therefore,Current through the resistor will be halved i.e