Quiz about Gravity Electricity and Magnetism

Question 1

Adding a second battery to an electromagnet will _____.

Accepted Answer

increase the current flowing through the wire

Answer

decrease the resistance in the wire

Answer

decrease the magnetism in the wire

Answer

increase the amount of current needed to magnetize the wire

Question 2

Which of the following statements describes an electric generator?

Accepted Answer

A magnet is rotated through a coil of wire to produce an electric current.

Answer

Electric potential in a rotating coil of wire creates a permanent magnet.

Answer

An electrical current causes a coil of wire to rotate in a magnetic field

Answer

Forces from a permanent magnet allow a coil of wire to rotate.

Question 3

Which diagram correctly represents the direction of the magnetic field around a bar magnet?

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

Answer

D.

Question 4

As the number of turns on an electromagnet is decreased, the pole strength of the electromagnet

Accepted Answer

Decreases

Answer

Increases

Answer

Remains the same

Question 5

Which diagram best illustrates the magnetic field that exists around a current- Carrying wire?

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

Question 6

Two magnets move away from each other. What happens to the magnetic attraction between them as they become further apart?

Accepted Answer

It decreases

Answer

it increases

Answer

it becomes zero

Answer

it does not change

Question 7

A magnet sticks to a table leg. Based on this information, which material could the table leg be made of?

Accepted Answer

Iron

Answer

wood

Answer

copper

Answer

aluminium

Question 8

Which of the circuits shown below will make both light bulbs glow?

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

Answer

D.

Question 9

Which of the following statements best compares direct current (DC) and alternating current (AC)?

Accepted Answer

DC flows in only one direction, and AC flows in both directions.

Answer

AC flows in only one direction, and DC flows in both directions.

Answer

AC comes directly from a power plant, and DC comes from a magnetic field.

Answer

DC can maintain a constant voltage over time, and AC loses voltage over time.

Question 10

Which of the following is most likely to require direct current (DC) for proper operation?

Accepted Answer

flashlight

Answer

blender

Answer

electric heater

Answer

microwave oven

Question 11

Which statement correctly describes the relationship that exists between the length of a wire and the amount of current?

Accepted Answer

Twice the amount of current occurs in half the length of wire.

Answer

Twice the length of wire allows twice the amount of current.

Answer

Decreasing the amount of current limits the length of the wire

Answer

Decreasing the length of the wire decreases the amount of current.

Question 12

There are three ways in which an object can become electrically charged:

Conduction, Induction, Friction

Which two of these methods require that the objects come into direct contact (touch), in order to transfer charges

Accepted Answer

1& 3

Answer

1 &2

Answer

2 & 3

Question 13

Lightning is an example of objects, clouds, becoming electrically charged due to induction. When the negative charges in the cloud jump to an object containing the opposite charge, we call the sudden flow of electrons ______________

Accepted Answer

static discharge

Answer

electric generator

Answer

sonic boom

Answer

static friction

Question 14

Two negatively charged particles are 1 millimeter apart. The electric force between them is 20 Newtons. How will the amount of electric force between the particles change if the particles move closer together

Accepted Answer

force will increase

Answer

force will decrease

Answer

force will stay the same

Answer

force will disappear

Question 15

If you cut a magnet in half you will have

Accepted Answer

Two magnets, each with a north pole and a south pole

Answer

Two magnets, one with a north pole only and one with a south pole only

Answer

One half will be a magnet and the other will no longer be a magnet

Answer

Two pieces but neither will be magnets anymore

Question 16

When two neutral materials are rubbed together, there is a transfer of electrical charge from one material to the other. The total electrical charge for the system _________________

Accepted Answer

Increases as electrons are transferred

Answer

Increases as protons are transferred

Answer

Remains constant (unchanged) as protons are transferred

Answer

Remains constant (unchanged) as electrons are transferred

Question 17

An inflated balloon which has been rubbed against a person's hair is touched to a neutral wall and remains attracted to it. Which diagram best represents the charge distribution on the balloon and wall?

Accepted Answer

Option C is correct

Answer

A.

Answer

B.

Answer

D.

Question 18

Which of the following statements about gravitational fields is true?

Accepted Answer

Any object that has mass is surrounded by a gravitational field: including a speck of dust, a human body, a paperclip, AND planets.

Answer

Gravitational fields affect objects only when two objects are touching.

Answer

Gravitational fields affect objects only if the objects are not in contact.

Answer

Only very massive objects, such as Earth, are surrounded by a gravitational field.

Question 19

If two objects move away from each other. What happens to the gravitational attraction between them?

Accepted Answer

it decreases

Answer

it increases

Answer

it becomes equal to zero

Answer

it does not change

Question 20

Which diagram best represents the gravitational field lines surrounding the Earth

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

Question 21

What do you call a material in which releases its electrons easily?

Accepted Answer

conductor

Answer

insulator

Answer

glass

Answer

static

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