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The correct answer is c. batteries

It is the difference found in electric potential energy that exists between two points per unit electric charge. This is commonly found in batteries.

Answer: The source of voltage difference is a battery.

Explanation :

We know that the electric current is defined as the electric charge flowing per unit time. To know the current flowing in a circuit it is required to know the voltage and resistance.

Batteries are the source of potential difference in a circuit. A battery has two terminals. The positive terminal of the battery is known as the cathode and the negative terminal is known as the anode.

So, the correct option is (c) " batteries ".

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