How do you find the potential difference in a circuit?

Question:

How do you find the potential difference in a circuit?

Current:

Current can be defined as the rate at which charge or electrons travel on any conductor. The direction of the current is in the opposite direction to the flow of electron the current is measured in a unit called ampere.

Answer and Explanation:

The potential difference of any circuit is calculated by a voltmeter. The voltmeter is always connected in parallel to the circuit. The voltmeter has very high resistance; thus, it draws the very little amount of current from the circuit.


The voltmeter works on the principle of Ohm's law,

For a conductor of resistance R and the current flowing through the conductor is, I,

Then the expression of voltage across the conductor is,

{eq}V = IR {/eq}


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Electric Current Lesson for Kids

from Science for Kids

Chapter 6 / Lesson 28
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