module 12

Question 1

Who was the inventor of the electric generator and electric transformer?

Answer 1

Michael Farady

Question 2

Like charges _____________ one another.

Answer 2

repel

Question 3

Opposite charges ____________one another

Answer 3

attract

Question 4

What is a fundamental force in nature that acts between charged particles and is the combination of all electrical and magnetic forces?

Answer 4

Electromagnetic force. It can attract or repel.

Question 5

Name the 3 principles regarding gravitational force.

Answer 5

1. all electrical charges attract or repel one another, depending on whether they have opposite charges or similar charges.
2. the force between charged objects is directly proportional to the amount of electrical charge on each object.
3. The force between charged objects is inversely proportional to the square of the distance between the two objects.

Question 6

What are photons?

Answer 6

photons are small packages of light that act just like small particles.

Question 7

Electrical force is inversely proportional to _________________________

Answer 7

the square of the distance between them.

Question 8

When an atom looses electrons, what do we call it?

Answer 8

a positively charged ion

Question 9

When an atom gains electrons, what do we call it?

Answer 9

a negatively charged ion

Question 10

What is one way atoms gain or loose electrons?

Answer 10

through chemical reactions

Question 11

What is is called when you charge an object by allowing it to come into contact with an object which has already has an electrical charge?

Answer 11

charging by conduction

Question 12

What is called when you charge an object by forcing some of the charges to leave the object?

Answer 12

charging by induction

Question 13

The number of electrons the flow through a circuit in a given amount of time is called __________________

Answer 13

the electrical current.

Question 14

electrical current is usually measured in ____

Answer 14

Amps.

Question 15

What is a Volt?

Answer 15

unit of electromotive force, the difference of potential that would drive one ampere of current against one ohm resistance.

Question 16

Describe conventional current.

Answer 16

Current that flows from the positive side of the battery to the negative side.

Question 17

What is the measure of how much a metal impedes the flow of electrons?

Answer 17

resistance.

Question 18

A circuit that does not have a complete connection between the two sides of the battery is called_______.

Answer 18

an open circuit

Question 19

When devices are connected to the same source, but can work independently of each other, this is called ___________________.

Answer 19

a parallel circuit.

Question 20

All magnetic force results from __________________.

Answer 20

The flow of charged particles.

Question 21

The two side of a magnet are called________________.

Answer 21

The north and south poles of a magnet.

Question 22

_________magnetic poles repel one another, while _________magnetic poles attract one another.

Answer 22

Like; opposite.

Question 23

Magnets are called _________because magnetic pols always come in pairs.

Answer 23

dipoles

Question 24

Scientists are looking for a pole isolated by itself, called a _____________.

Answer 24

monopole.

Question 25

What is a magnetic field?

Answer 25

The force between the poles of a magnet.