What is the voltage across a 10-ohm resistor if a current of 1 ampere flows through it?

To determine the voltage across a resistor when a current flows through it, Ohm's Law is applied. Ohm's Law states that the voltage (V) across a resistor is equal to the current (I) flowing through it multiplied by the resistance (R) of the resistor: V = I × R.

In this scenario, the resistance is given as 10 ohms and the current flowing through the resistor is 1 ampere. By substituting the known values into the equation:

V = 1 ampere × 10 ohms = 10 volts.

This calculation clearly shows that the voltage across the 10-ohm resistor is 10 volts when a current of 1 ampere passes through it, making this the correct answer.