A $10$ horsepower DC motor draws $31$ amps at $300$ volts. What is the efficiency of the motor? ($1$ horsepower = $746$ watts)

If a device uses $280 W$ of power continuously for one day, how much energy in kilowatt-hours does it consume in that day?

An electric device uses $650$ watts of power. If the voltage across the device is $120$ volts, what is the current flowing through the device?

A popcorn-maker transfers $250J$ of energy into other energy stores every second. What is its power?

Which physical quantity is measured in watts ($W$)?

Which of the following best describes a power transmission device in physics?

The power consumed by a load is measured in which of the following units?

If a circuit dissipates a reference power $P_0$ under certain conditions, what is the power dissipated by the circuit in terms of $P_0$ if the voltage across the circuit is doubled while the resistance remains constant?