Question

The resistance of a wire is \( 10 \, \Omega \) and the current passing through it is \( 2 \, \text{A} \). What is the potential difference across the wire?

• A. \( 20 \, \text{V} \)
• B. \( 5 \, \text{V} \)
• C. \( 15 \, \text{V} \)
• D. \( 10 \, \text{V} \)

Hint:

Use Ohm's law \( V = IR \) to calculate the potential difference when you know the current and resistance.

Answer 1

The Correct Option is A

Step 1: Use Ohm's law \[ V = IR \] Where: - \( V \) is the potential difference - \( I \) is the current - \( R \) is the resistance Given: - \( I = 2 \, \text{A} \) - \( R = 10 \, \Omega \) Substitute the values into the formula: \[ V = 2 \times 10 = 20 \, \text{V} \] Answer: Therefore, the potential difference across the wire is \( 20 \, \text{V} \). So, the correct answer is option (1).