An electrical device that operates by chemically creating a potential difference between two points is a ___.

An electrical device that operates by chemically creating a potential difference between two points is a ___.

• A. battery
• B. resistor
• C. capacitor
• D. inductor

Answer: (B)

A device that creates a potential difference by converting chemical energy into electrical energy is a battery. Inside a battery, chemical reactions push electrons from one terminal to the other, establishing a voltage between the terminals and supplying electrical energy to the circuit. Resistors don’t generate voltage—they simply use energy and convert it to heat as current flows. A capacitor can develop voltage, but only by storing charge from an external source; it doesn’t produce the energy itself. An inductor stores energy in a magnetic field and affects current changes, without chemical generation of voltage.

A device that creates a potential difference by converting chemical energy into electrical energy is a battery. Inside a battery, chemical reactions push electrons from one terminal to the other, establishing a voltage between the terminals and supplying electrical energy to the circuit. Resistors don’t generate voltage—they simply use energy and convert it to heat as current flows. A capacitor can develop voltage, but only by storing charge from an external source; it doesn’t produce the energy itself. An inductor stores energy in a magnetic field and affects current changes, without chemical generation of voltage.