Which expression correctly represents voltage in terms of power and current?

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Multiple Choice

Which expression correctly represents voltage in terms of power and current?

Explanation:
Voltage in terms of power and current comes from the relationship P = V × I, where power (watts) equals voltage (volts) times current (amps). To get voltage using power and current, solve for V: V = P ÷ I. That’s why the correct expression is P divided by I. The other forms don’t fit this specific relationship: V = I × R would use resistance, not power; V = P × I would give incorrect units; V = I ÷ P would also yield the wrong units.

Voltage in terms of power and current comes from the relationship P = V × I, where power (watts) equals voltage (volts) times current (amps). To get voltage using power and current, solve for V: V = P ÷ I. That’s why the correct expression is P divided by I. The other forms don’t fit this specific relationship: V = I × R would use resistance, not power; V = P × I would give incorrect units; V = I ÷ P would also yield the wrong units.

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