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3 years ago

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John performs an experiment on an electric circuit. He increases the voltage from 25 volts to 50 volts while keeping the resista

nce constant. What will be the effect of John's changes on the current?

1 answer:

Marta_Voda [28]3 years ago

6 0

The current will double

Explanation:

The relationship between voltage and current in an electric circuit is given by the following equation (Ohm's law):

$V=IR$

where

V is the voltage

I is the current

R is the resistance

making R the subject,

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

Since in this experiment the resistance is kept constant, we can write:

$\frac{V_1}{I_1}=\frac{V_2}{I_2}$

where

$V_1=25 V$ is the voltage in the 1st experiment

$V_2=50 V$ is the voltage in the 2nd experiment

$I_1,I_2$ are the currents in the 1st and 2nd experiment

We can re-arrange the equation as

$\frac{I_2}{I_1}=\frac{V_2}{V_1}=\frac{50}{25}=2$

This means that the current will double in the 2nd experiment.

Learn more about current and voltage:

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