Question

Which of the following is a common source of voltage difference?

a circuit
b wire
c batteries
d lightning

Answer 1

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 ".

Answer 2

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.