Magnetism and Electricity Test - 7th

A circuit is the path followed by an electric current. A circuit is made up of three parts. The first part is energy source, such as a battery or generator. The second part is an energy receiver, such as a motor or lightbulb. The third part is a connection, such as a wire or cable that carried energy from the source to the receiver. In addition, there are two basic types of circuits: series and parallel. According to the passage, what is the second part of a circuit?

• electric current

• energy source

• energy receiver

• a generator

Students made an electromagnet by wrapping a wire in loops around an iron nail and attaching the wire to a battery. The students conducted a test to learn how the number of wire loops affected the number of paper clips held by the electromagnets. Which of the following is true about electromagnets?

• adding more wire loops makes an electromagnet weaker

• adding more wire loops make an electromagnet stronger

• adding more wire loops make an electromagnet use less electricity

• adding more wire loops makes an electromagnet use more electricity

The force of magnetism is stronger when magnets are ________________

• cold
• round
• closer together
• farther apart

Magnets can pull on things without touching them.

• True

• False

What is a current?

• A constant flow of electricity 
• A path that a current can flow along

What is a circuit?

• A constant flow of electricity 
• A path that a current can flow along

What are the 3 basic components of a circuit (look at the diagram)?

• Power source, Load, Energy Pathway

• Battery, Energy source, Energy Pathway
• Battery, Wire, Energy Pathway
• None of them

What is an electrical circuit?

• a whole bunch of wires

• a broken path that electric charges can flow

• a circuit board

• a complete, unbroken path through which electric charges flow

Describe a series circuit.

• a circuit that has multiple branches

• a circuit that has one path

• a circuit that dead ends after a light bulb

What is a parallel circuit?

• a continuous loop

• a circuit with one path

• a circuit with multiple paths for each individual appliance or light