Question

any device that uses current is a
switch.
voltmeter.
battery.
resistor.

Explanation:

• A switch is used to open or close a circuit, not to use current.
• A voltmeter is used to measure voltage, and it is connected in parallel, drawing negligible current.
• A battery is a source of electrical energy (provides current), not a device that uses current.
• A resistor is a device that opposes the flow of current and in the process, it uses the current (converts electrical energy to other forms like heat), for example, in a circuit with a resistor, current flows through it and power is dissipated in the resistor as per \(P = I^{2}R\).

Answer:

D. resistor