Answer: voltmeter.
- A voltmeter
- B ammeter
- C galvanometer
- D barometer
Correct answer: A. voltmeter
Explanation: A voltmeter measures potential difference (voltage).
Field lines (radial) and equipotential lines (concentric circles) of a point charge. Equipotential surfaces are always perpendicular to the field lines. Image: Sjlegg, Public Domain, via Wikimedia Commons.
Concept context
Electric potential, equipotential surfaces, potential energy of charge systems, conductors, dielectrics, capacitors, combinations, and energy storage.
Read the full Electrostatic Potential and Capacitance notes →