Electricity and Magnetism

What will happen in a parallel circuit if one of its loops is broken?

• The electirc current will still flow through the broken loops.
• The electric current will still flow through the unbroken loop.
• The electric current will not flow through any of the loops.
• The energy source will stop providing energy to move electric charges.

Which of these materials is a conductor?

• gold
• glass
• rubber
• chalk

A washing machine is an example of transforming

• heat into motion energy
• electricity into motion energy
• motion energy into electric energy
• electricity into light

What is one use for an insulator?

• It stores electric energy for later use.
• It makes electrically charged objects safe to handle.
• It allows electric current to flow through it.
• It slows down the flow of electric current to produce heat and light.

Which of the following is caused by the energy of motion?

• filament
• conductor
• resistor
• friction

Electric current cannot flow in a series circuit if

• there is a break in the circuit
• the circuit contains an insulator
• the circuit contains a resistor
• the circuit has only one loop in it

Which of the following uses resistors to transform electircal energy into heat?

• a printer
• a telephone
• a toaster
• a gas stove

You see two balloons that attract one another.  What can you conclude about the balloons?

• Electric force is not affecting the balloons.
• The electric force between the balloons is weak.
• Both balloons are neutral.
• The balloons do not have the same charge.

Which of the following describes what happens when you use the brakes on a bike when you are going down hill?

• friction
• static electricity
• magnetic field
• magnetism

One example of a resistor is

• a switch
• a battery
• a filament
• a power cord