Delhi Police Constable Exam Model Paper 4

• A device used for producing electric current is called Generator.
• A galvanometer is used for detecting and indicating electric current.
• An ammeter is used to measure the current in a circuit.
• An electric motor converts electrical energy into mechanical energy.

Difference between Ammeter and Galvanometer:

• The ammeter shows only the magnitude of the current.
• The galvanometer shows both the direction and magnitude of the current.
• The generator works on the principle of electromagnetic induction.
• It was discovered by Michael Faraday.
• A galvanometer works as an actuator.
• An ammeter is always connected in series.
• A voltmeter is always connected in parallel.