Which unit measures electric current strength?

Which unit measures electric current strength?

• A. Volt (V)
• B. Watt (W)
• C. Ohm (Ω)
• D. Ampere (A)

Answer: (D)

Ampere is the unit that measures the strength of electric current. It describes how much electric charge flows past a point each second; by definition, 1 ampere equals 1 coulomb per second. The other units relate to different quantities: volt measures electric potential difference (the push behind the current), watt measures electrical power (the rate of doing work), and ohm measures resistance (how much a component resists current). In practical terms, current follows I = V / R, so higher voltage or lower resistance increases current. The symbol A is used for amperes, named after André-Marie Ampère.

Ampere is the unit that measures the strength of electric current. It describes how much electric charge flows past a point each second; by definition, 1 ampere equals 1 coulomb per second. The other units relate to different quantities: volt measures electric potential difference (the push behind the current), watt measures electrical power (the rate of doing work), and ohm measures resistance (how much a component resists current). In practical terms, current follows I = V / R, so higher voltage or lower resistance increases current. The symbol A is used for amperes, named after André-Marie Ampère.