What instrument measures potential difference — select the correct answer.

✅ B. Convex lens

A convex lens is thicker at the center and converges parallel light rays. Read more

✅ A. Ammeter

An ammeter measures electric current. Read more

✅ B. Tesla

Magnetic flux density is measured in teslas. Read more

✅ C. Voltmeter

A voltmeter measures potential difference. Read more

✅ A. Pascal

Pressure is measured in pascals. Read more

✅ D. Lever

A lever is a rigid bar that rotates around a fulcrum. Read more

✅ B. Elastic potential energy

A stretched spring stores elastic potential energy. Read more

✅ D. 9.8 m/s²

Near Earth's surface, gravitational acceleration is approximately 9.8 m/s². Read more