Magnets
Circuits
Review
Electricity
Mix-It
100

The region around a magnet where the magnetic force is exerted is known as its

magnetic field

100

Ohm's law describe the relationship between resistance, voltage, and  

current


100

The needle of a compass aways points to

Earth's magnetic north

100

lightning strikes and static shocks when you rub a sweater are examples of

electrical discharges

100

A positive balloon approaches 2 neutral metal spheres that are touching as seen in Figure 1.  If the two spheres are separated, and then the balloon is removed as shown in Figure 2, what charge will the sphere have?


A-negative

B-positive

200

Most materials are not magnetic because their magnetic domains are arranged

randomly


200

A complete, unbroken path through which electric charges can flow is an

electric circuit

200

What charge do protons, neutrons, and electrons have?

protons (+)

neutrons (0)

electrons (-)

200

After an electrical discharge is the object positive, negative, or neutral?

Neutral

200

What type of charge transfer is shown?


induction

300

Magnetic poles that are alike

repel

300

True or False: An open circuit allows the flow of electrons

False

300
True or False: Electroscopes can detect the presence of an electric charge.

True


300

Materials that allow the charges of an electric current to move freely through them are called

conductors

300

Earth's magnetic field can make a magnet out of an iron bar by causing the domains to

line up in the same direction.

400

What happens if you break a magnet in half?

new north and south poles will form


400

What causes charge to move in a circuit?

voltage

400

What is a characteristic of a series circuit?

bulbs are dim

if one bulb goes out, they all do

there is only 1 path for electrical flow

high resistance

400

Materials that block the flow of electrical charges are _________.

Examples include rubber and wood

insulators

400

Clothes in a dryer acquire static cling by

a. induction

b. conduction

c. friction

c. friction

500

A cluster of billions of atoms that all have magnetic fields lined up in the same way is known as a

magnetic domain

500

This device can open and close a circuit

switch


500

How many poles does a magnet have and what are they called?

2, north and south

500

electrical charges that are unalike will _______ each other.

attract

500

Rubbing a balloon on your hair is an example of ______ and this causes the balloon to become _______ charged.

friction, negatively

600

This diagram shows circular magnets on a pencil. What pole is B?


South

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