Electric components such as batteries and switches are represented using ___ in circuit diagrams.

Standard symbols

True or False: A battery is represented by a single cell symbol in electric circuit diagrams.

False, a battery is represented by multiple cell symbols.

I am essential for your gadgets and lights, but you cannot see me. What am I?

Electric current

True or False: An open circuit allows electricity to flow.

False; an open circuit is incomplete and does not allow electricity to flow.

What happens to a light bulb if the filament inside it breaks?

If the filament breaks, the circuit becomes incomplete, causing the bulb to stop glowing as it no longer receives electricity.

The heating effect of electric current is primarily due to ___ when it flows through a conductor.

The resistance of the conductor

What is the primary function of an electric fuse?

An electric fuse is designed to melt and break the circuit when the current exceeds a safe limit, thereby stopping the current flow and preventing fires.

True or False: Miniature Circuit Breakers (MCBs) can be reset after a fault is resolved.

True. MCBs can be turned back on after the issue in the circuit is fixed.

What is the primary discovery made by Hans Christian Oersted regarding electric current?

Hans Christian Oersted discovered that electric current flowing through a wire creates a magnetic field around the wire.

What is the role of the spring in an electric bell?

The spring returns the armature to its original position after each strike, allowing the circuit to reconnect and the cycle to repeat.

When the electric current flows through the coil of an electric bell, it transforms into an ___ which attracts the armature.

Electromagnet