10 Questions
What is the main energy conversion that takes place in an electric motor?
Electrical energy to kinetic energy
How is torque created on the coil in an electric motor?
The magnetic field interacts with the coil
What principle is a moving-coil loudspeaker based on?
Electromagnetic induction
What is the electricity conversion process in a transformer primarily used for?
Changing the voltage of a.c. power supplies
How does an alternating current (a.c.) generator work?
By inducing an emf in a conductor as it moves through a magnetic field
What is the primary function of an electromagnetic relay?
To switch on and off a current in a second circuit
What happens when current flows through a current-carrying conductor in a magnetic field?
The conductor deflects due to the magnetic field
What is the principle behind a simple d.c. motor?
A coil of wire through which current flows rotates between the poles of a magnet
What is the role of the primary circuit in an electromagnetic relay?
To turn on the electromagnet
What happens when the armature is attracted in an electromagnetic relay?
The contacts in the secondary circuit are forced together
Learn about the functioning of an electromagnetic relay, which is an electromechanical switch involving an electromagnet and contacts. Explore how current in one circuit can control the current flow in another circuit.
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