Circuites And Magnetism

Question 1

What is it called when areas where atoms’ magnetic fields line all faces up

Answer 1

Domain

Question 2

What is the potential difference

Answer 2

The difference across a cell that tells you about the size of the force on the charges.
The potential difference also tells you how much energy can be transferred to components in a circuit by charges

Question 3

How you find resistance, potential difference and ams

Answer 3

Pd divided by ams or ohms

Ams x ohms

Question 4

Parts of a circuit

Answer 4

Ammeter, cell, bulb, switch and voltage meter.

Question 5

What materials category can’t contain electricity

Answer 5

Insulators

Question 6

What have positive charges

Answer 6

Protons

Question 7

What has negative charges

Answer 7

Electrons

Question 8

What is a neutron

Answer 8

It has no charge

Question 9

What happens if atoms have an equal amount of protons and electrons

Answer 9

It has no charge and is netral

Question 10

What is a current?

Answer 10

It is the amount of charge flowing through a circuit per second (ams)

Question 11

What does a cell or battery do

Answer 11

It pushes the charges around the circuit

Question 12

What is potential difference measured in

Answer 12

Volts from voltmeters

Question 13

Resistance is measured in?

Answer 13

Ohms

Question 14

What are good conductors

Answer 14

Metal as has low resistance and has a lot of electrons that are free to move.

Question 15

Types of Insulators

Answer 15

Air and plastic as it doesn’t have many electrons that are free to move and create resistance.

Question 16

What is a good magnetic material

Answer 16

Iron nickel cobalt lodestone

Question 17

What is a magnetic field

Answer 17

It is a force on a magnet

Question 18

What do domains do

Answer 18

The always face one direction in a magnet

Question 19

Atoms in turn are made of three types of smaller particles called

Answer 19

Protons
Electrons
Neutrons

Question 20

What happens when you rub a ballon on a jumper

Answer 20

The ballon will have negative charge and the jumper will have positive charge so they react

Question 21

Current

Answer 21

Amount of charge that flows per second

Question 22

What are the particles that move in metals

Answer 22

Electrons

Question 23

Measuring potential difference in a cell

Answer 23

by connecting voltmeters across

Question 24

How much charge is in an atom

Answer 24

It is neutral

Question 25

I can distinguish static and current electricity.

Answer 25

Static electricity is an imbalance of electric charges within or on the surface of a insulator. The most significant difference between the static and current electricity is that in static electricity the charges are at rest and they are accumulating on the surface of the insulator. Whereas in current electricity the electrons are moving inside the conductor.

Question 26

The cell or battery does what

Answer 26

Pushes around the circuit

Question 27

I can compare a gravitational field and an electric field.

Answer 27

In an electric field there is a force on the charge. A gravitational field is the force field that exists in the space around every mass or group of masses. Electric force is much stronger than gravitational force. Gravitational force acts on mass while electric force acts on charge.

Question 28

What does a resistor do and effect

Answer 28

So a resistor is used to limit the current. When a current flows through a resistor energy is wasted and the resistor heats up. The greater the resistance the hotter it gets. The battery has to do work to force the electrons through the resistor and this work ends up as heat energy in the resistor.

Question 29

How does a compass work

Answer 29

The Earth is a magnet that can interact with other magnets in this way, so the north end of a compass magnet is drawn to align with the Earth’s magnetic field. Because the Earth’s magnetic North Pole attracts the “north” ends of other magnets, it is technically the “South Pole” of our planet’s magnetic field.