Electricity and Circuits Quiz

What are the two essential components needed for electricity to flow?

• A resistor and a capacitor

• A battery and a switch

• A voltage difference and a closed loop

• A power source and a conductor

How does a 9-volt battery affect the speed of a motor compared to a 1.5-volt battery?

• It has no effect on the motor's speed

• It makes the motor spin faster

• It stops the motor from spinning

• It makes the motor spin slower

Why doesn't electricity flow in an open loop?

• Because the circuit is overloaded

• Because the wires are too long

• Because the loop is not closed

• Because there is no voltage difference

What is the main reason electricity flows through a closed loop?

• Because it is the shortest path

• Because it is the only path

• Because it completes the circuit

• Because it is the safest path

What does a multimeter measure in a material?

• Voltage

• Current

• Resistance

• Capacitance

Which material was found to conduct electricity better than a ribbon?

• Deionized water

• Shoelace

• Knife with cake

• Lead from a mechanical pencil

Why is pure deionized water a poor conductor of electricity?

• It is too cold

• It is too dense

• It has too many impurities

• It lacks ions

What happens when a bird touches both a high voltage and a low voltage power line?

• The bird remains safe

• The bird completes a circuit and gets electrocuted

• The bird flies away

• The bird glows

Why should hair dryers be kept away from bathtubs?

• They can break easily

• They can cause electric shock

• They can overheat

• They can get wet

What is the role of salt in water regarding electrical conductivity?

• It decreases conductivity

• It increases conductivity

• It makes water evaporate

• It has no effect