Ohm's law: If a resistor has resistance 5 Ω and current 2 A, what is the voltage?

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Ohm's law: If a resistor has resistance 5 Ω and current 2 A, what is the voltage?

Voltage comes from multiplying current by resistance. With a current of 2 A through a 5 Ω resistor, the voltage is V = I × R = 2 × 5 = 10 volts. This matches the given values—2 A and 5 Ω—and since those two quantities are fixed, the resulting voltage must be 10 V. If you tried the other numbers, you’d need different current or resistance to get those voltages (for example, 6 V would need 1.2 A with 5 Ω, 4 V would need 0.8 A, and 20 V would need 4 A).

Voltage comes from multiplying current by resistance. With a current of 2 A through a 5 Ω resistor, the voltage is V = I × R = 2 × 5 = 10 volts. This matches the given values—2 A and 5 Ω—and since those two quantities are fixed, the resulting voltage must be 10 V. If you tried the other numbers, you’d need different current or resistance to get those voltages (for example, 6 V would need 1.2 A with 5 Ω, 4 V would need 0.8 A, and 20 V would need 4 A).

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