Electricity and Magnetism Review

To complete a circuit the switch must be

• unattached

• open

• closed

When the switch is closed, the light

• comes on

• stays off

• burns out

An open circuit

• allows electricity to flow

• has no resistance

• requires little voltage

• does not allow electricity to flow

A material through which electrons do NOT flow easily is a(n) ______.

• insulator

• conductor

• fuse

• circuit breaker

Mr. Robinson and his class are conducting an experiment. The class needs to choose a good insulator. Which of the following could be used as an insulator?

• glass

• silver spoon

• copper wire

• gold necklace

What is the current produced by a 9-volt battery flowing through a resistance of 0.2 ohms? Hint: I= V/R

• 1.8 amps

• 45 amps

• 0.022 amps

• 8.8 amps

If the battery produced 12.6 Volts and what would be the current flow be for a 6 Ohm resistor? Hint I= V/R

• 2.1 Amps

• 2.4 Amps

• 1.71 Amps

• 15 Amps

Which statement best describes the circuit in the diagram?

• It is a series circuit with two resistors

• It is a parallel circuit with two resistors

• There are 2 paths.

• The circuit is opened

This is an example of what type of circuit?

• parallel

• simple

• series

A student experimented by placing a second, and then a third, bulb in series with an existing battery and bulb. The student noticed that as each bulb was added, all the bulbs got dimmer. As an experimental control, all the bulbs in the circuit were identical. Which statement represents a valid conclusion from the above experiment?

• The electrons get tired as they go through each bulb and are really tired when they get to the third bulb

• Three bulbs draw more current from the battery, pulling its voltage down

• The first bulb uses up some of the current, leaving less for the other bulbs.

• The resistance of three bulbs in series is greater than the resistance of one light bulb.