Electricity and Magnetism Quiz

What material is a good conductor?

• copper
• wood
• rubber
• plastic

What material is an insulator?

• coper
• silver
• gold
• plastic

A type of circuit where each component is connected, one after the other, in a SINGLE loop. 

• series circuit
• parallel circuit

This is an example of...

• series circuit
• parallel circuit

A student is investigating how changing the size of the core of an electromagnet affects its strength.  Which of these is most likely the dependent variable in the student's investigation?

• the number of wire coils wrapped around the core
• the number of paper clips picked up by the electromagnet
• the voltage of the battery used in the circuit
• the size of the piece of iron used as the core

A laptop is plugged into a 120 V outlet and uses 60 ohm's of resistance. How much current is running though it?

• 120 Amps

• 60 Amps

• 2 Amps

• 20 Amps

The three basic components of a circuit are

• load, energy source, magnets

• wires, load, solenoid

• wires, load, energy source

• energy source, iron core, load

Where does a magnet have the strongest magnetic field?

• at the poles

• in the middle

• only at the north pole

• only at the south pole

If two atoms, each with a different charge (+ and -), were brought near each other, they would....

• attract each other

• repel each other

• create static discharge

• have on effect on each other

The current in a hair dryer measures 15.0 Amps. The resistance of the appliance is 8.0 ohms. What is the voltage?

• 120 V

• 0.5 V

• 7.0 V

• 1800 V