Ohms are the unit used to measure which property?

Ohms are the unit used to measure which property?

• A. Voltage
• B. Current
• C. Resistance
• D. Power

Answer: (C)

Ohms measure resistance, the opposition a component offers to electric current. The ohm is the unit for resistance, symbolized by Ω. This relates to Ohm’s law, which states that resistance equals voltage divided by current (R = V/I). So for a given voltage, a higher resistance means less current; for a given resistance, increasing voltage increases current. For example, 5 volts across a 10-ohm resistor gives 0.5 amperes of current. Other quantities have different units—voltage is in volts, current in amperes, and power in watts—so the unit that measures resistance is the ohm.

Ohms measure resistance, the opposition a component offers to electric current. The ohm is the unit for resistance, symbolized by Ω. This relates to Ohm’s law, which states that resistance equals voltage divided by current (R = V/I). So for a given voltage, a higher resistance means less current; for a given resistance, increasing voltage increases current. For example, 5 volts across a 10-ohm resistor gives 0.5 amperes of current. Other quantities have different units—voltage is in volts, current in amperes, and power in watts—so the unit that measures resistance is the ohm.