Electricity and Magnetism - A

1.

Multiple Choice

20 sec

1 pt

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

2.

Multiple Choice

1 min

1 pt

Walking across a carpet is a perfect example of charge being transferred by...

contact

induction

static electricity

friction

3.

Multiple Choice

20 sec

1 pt

If a neutral metal comb is held near an object with a negative charge, the comb will become charged by....

static discharge

contact

friction

induction

4.

Multiple Choice

10 sec

1 pt

What type of current is produced by a battery?

parallel current

alternating current

direct current

potential current

5.

Multiple Choice

30 sec

1 pt

In which of the following materials do charges to flow more easily?

glass

wool

metal wires

rubber mats

6.

Multiple Choice

20 sec

1 pt

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

7.

Multiple Choice

20 sec

1 pt

Which of the following represents Ohm’s law?

I = V / R

V = I x R

R = V x I

V = I / R

8.

Multiple Choice

20 sec

1 pt

How many paths through which charge can flow would be shown in a circuit diagram of a series circuit?

two or more

one

none, the circuit is open

more information is needed

9.

Multiple Choice

30 sec

1 pt

Which of the following statements describes the interaction between magnetic poles?

Like poles attract each other.

Like poles repel each other, and opposite poles attract each other.

Opposite poles repel each other.

Like poles attract each other, and opposite poles repel each other.

10.

Multiple Choice

30 sec

1 pt

Which of the following statements is true about Earth’s magnetic poles?

They are located at Earth’s geographic poles.

They are the areas where Earth’s magnetic field is weakest.

They are the areas where Earth’s magnetic field is strongest.

Earth has four magnetic poles.

11.

Multiple Choice

1 min

1 pt

If you break a bar magnet in half, each half...

contains one magnetic pole.

becomes a bar magnet with two poles.

becomes unmagnetized.

is only temporarily magnetized.

12.

Multiple Choice

10 sec

1 pt

What creates a magnetic field?

charged particles that do not move

moving electric charges

gravity

an isolated magnetic pole

13.

Multiple Choice

30 sec

1 pt

How are fossil fuels used to generate electrical energy?

Heat from burning fuel creates steam that spins a turbine.

Heat from burning fuel spins magnets inside an electric motor.

Heat from burning fuel causes an electric motor to produce a current.

Heat from burning fuel creates steam that turns a transformer.

14.

Multiple Choice

30 sec

1 pt

A temporary magnet that only works when electricity is passed through wires surrounding an iron core is called:

electromagnet

galvanometer

induction

super conductor magnet

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