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

To find the voltage across a resistor when a known current flows through it, Ohm's Law is applied. Ohm's Law states that the voltage (V) across a resistor can be calculated using the formula:

V = I × R

where V is voltage in volts, I is current in amperes, and R is resistance in ohms.

In this scenario, a current of 1 ampere flows through a 10-ohm resistor. By substituting the values into the formula:

V = 1 ampere × 10 ohms

This calculation yields:

V = 10 volts

Hence, the voltage across the 10-ohm resistor is 10 volts. This understanding is critical in electrical engineering and circuit analysis as it provides the basis for calculating how components in a circuit operate under different loads.