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

Which of the following equations correctly expresses power in terms of work and time?

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

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

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?

A circuit dissipates a power $P_0$ when operating under certain conditions. If the circuit parameters are changed such that the voltage across it is doubled while the resistance remains the same, what is the new power dissipated by the circuit in terms of $P_0$?

If a $1500$−W heater is designed to be plugged into a $120$−V outlet, what is the current drawn by the heater?

If the heating element of an electric dryer is rated at $4.1\mathrm{kW}$ when connected to a $240V$ line, what is the current drawn by the dryer?