Which expression accurately represents the watt?

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Multiple Choice

Which expression accurately represents the watt?

Power in an electrical circuit is the rate at which energy is transferred. In a simple DC scenario, this power equals voltage times current, so watts are derived from multiplying volts by amps. That makes the product of current and voltage the correct way to represent the watt. Other combinations don’t describe power: dividing voltage by current gives resistance (ohms), not power; dividing current by voltage gives a conductance-like measure (not power); and expressing resistance as volts divided by amps is just another form of resistance, not power.

Power in an electrical circuit is the rate at which energy is transferred. In a simple DC scenario, this power equals voltage times current, so watts are derived from multiplying volts by amps. That makes the product of current and voltage the correct way to represent the watt.

Other combinations don’t describe power: dividing voltage by current gives resistance (ohms), not power; dividing current by voltage gives a conductance-like measure (not power); and expressing resistance as volts divided by amps is just another form of resistance, not power.

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