Electricity and Magnet Review

What happens when batteries are stacked up?

• They make higher voltages.

• They make lower voltages.

• Nothing happens.

Will the light bulb in this circuit light and why/why not?

• yes, because it has two batteries
• no, because the switch is open
• yes, because it is in a circuit
• no, because the bulb is burned out

What can you do to make an electromagnet stronger?

• wrap the coil more times

• wrap the coil more closely together

• use a stronger battery

• all of the above

What are materials such as plastic and rubber called?

• Insulators

• Ohm's

• Conductors

• Electric

  Circuits

A continuous flow of electricity is called_____________

• series
• circuit
• static
• current

The light bulb is lit and the electrons are flowing. This is an example of what type of circuit?

• Open

  circuit

• Closed

  circuit

In a parallel circuit if one light bulb goes OUT; then they ALL go out. TRUE OR FALSE?

• TRUE
• FALSE

Area around a magnet in which magnetic forces can act

• magnetic field

• magnets

• magnetic pole

A(n) _______is a device used to increase or decrease the voltage of an electricity supply. They are designed to be as efficient as possible (up to 99.9% efficient). 

• transformer

• transmitter

• windmill

• firestation

Answer explanation

A transformer is specifically designed to increase or decrease voltage in an electrical supply, achieving high efficiency. Other options like transmitter, windmill, and firestation do not serve this purpose.

The lightbulb is off and the electrons are not flowing.

This is an example of what type of circuit?

• Open

  circuit

• Closed

  circuit