Question

Work done to move a unit charge from one point to the other in an electric circuit is called

• A. electric potential difference
• B. electric current
• C. electric resistance
• D. electric power

Hint:

Remember the relationship between work, charge, and potential difference: \( V = \frac{W}{Q} \), where \( V \) is the potential difference, \( W \) is the work done, and \( Q \) is the charge moved.

Answer 1

The Correct Option is A

Step 1: Recall the definition of electric potential difference.
Electric potential difference between two points in an electric circuit is defined as the amount of work done to move a unit positive charge from one point to the other. Step 2: Analyze the given options. \begin{enumerate} \item Electric potential difference: This matches the definition given in the question. It is the work done per unit charge to move a charge between two points. \item Electric current: This is the rate of flow of electric charge. It is not the work done to move a charge. \item Electric resistance: This is the opposition to the flow of electric current in a circuit. It is related to the voltage and current by Ohm's law (\( V = IR \)), but it is not the work done per unit charge. \item Electric power: This is the rate at which electrical energy is transferred by an electric circuit. It is the product of voltage and current (\( P = VI \)), and it represents energy per unit time, not work per unit charge. \end{enumerate} Step 3: Identify the correct term.
Based on the definitions, the work done to move a unit charge from one point to the other in an electric circuit is called electric potential difference.