Current In A Circuit

What is the main function of a switch in a simple electric circuit?

• To turn the circuit on and off

• To increase the current

• To store energy

• To measure voltage

Which component is used to measure the current flowing in a circuit?

• Ammeter

• Voltmeter

• Battery

• Switch

What is the unit of electric current?

• Ampere

• Volt

• Ohm

• Watt

What happens when the switch in a complete circuit is closed?

• The lamp will light

• The battery will stop working

• The electrons stop moving

• The circuit breaks

What are electrons?

• Negatively charged particles in atoms

• Positively charged particles in atoms

• Neutral particles in atoms

• Particles that form light

What does a complete circuit require?

• A closed path between the battery and the lamp

• An open switch

• A broken wire

• A disconnected battery

How does energy transfer in a simple electric circuit?

• From the battery to the lamp by current

• From the lamp to the battery by heat

• From the switch to the wire by light

• From the wire to the switch by sound

What is the symbol for current in a circuit diagram?

• I

• V

• R

• P

What happens to electrons when a wire is connected to a battery?

• They are pushed around the circuit in one direction

• They stop moving

• They move randomly

• They move towards the positive terminal only

Why is the ampere named so?

• After André-Marie Ampère who invented the first ammeter

• After the inventor of the battery

• After the scientist who discovered electrons

• After the person who invented the light bulb