No Chapter 16-Electricity

Question 1

And Atom has a nucleus, What does the nucleus contain

Answer 1

The nucleus has positively charged protons surrounded by a cloud of negatively charged electrons.

Question 2

In an atom the number of protons and electrons is the same, why is this?

Answer 2

So that the charges cancel that each other and atom is neutral.

Question 3

What is an insulator?

Answer 3

Insulator is a material that does not allow electrical currents to pass through it

Question 4

What does an insulator do?

Answer 4

It holds onto the electric charge, the electric charge does not go anywhere, it is static

Question 5

What is a conductor?

Answer 5

A conductor allows a current of electricity to pass through it. It cannot hold onto electric charges because it conducts them away

Question 6

Give some examples of insulators and conductors

Answer 6

Conductor/copper, iron copper and aluminum

Insulator/rubber, plastic, wood

Question 7

What happens when some materials are rubbed together?

Answer 7

The materials can lose electrons, this means But there are there any more positive charges then negative ones and the material becomes positively charged.

Question 8

When are the materials are rubbed they can gain electrons what does this mean?

Answer 8

This means that there are more negative Chargers present then positive ones and the material becomes negatively charged.

Question 9

If two balloons or negatively charged and hung some threads and brought close together what would happen?

Answer 9

They would push away from each other, because like electrical charges repel each other

Question 10

If a positively charged material is brought near a negatively charged balloon what would the balloon do?

Answer 10

The balloon would move towards it because opposite charges attract

Question 11

What is an Induced charge?

Answer 11

And I just charge is one that is made In a material buy a charged material without the two materials touching.

Question 12

Give an example of induced charge

Answer 12

If you rub a plastic pen with cloth the pin or lose electrons and become positively charged. When the penis held over tiny pieces of paper it introduces a negative charge on their surfaces

Question 13

How can you check induced charge?

Answer 13

I can be checked by moving the pain that you rubbed with a cloth, so that it would lose its electrons and become positively charged, very close to the paper, the paper jumps up to the pain because opposite charges attract.

Question 14

What are the capacitors?

Answer 14

Charge stored in a devices are called capacitors

Question 15

When is charge released from the capacitor?

Answer 15

When it is switched into a circuit with a conductor.

Question 16

Today, capacitate is a tiny electron it devices which are used in digital sensors, what Do they do in the digital sensors?

Answer 16

They store electrical charge when it changes in light, pH or movement are being recorded

Question 17

If two oppositely charged surfaces a highly charged a……… May pass between them

Answer 17

Spark

Question 18

How can sparks be dangerous?

Answer 18

Sparks could cause an explosion in fuel vapor.

Question 19

Give an example of two positively charged Surfaces that result in a spark

Answer 19

Lightning in a storm

Question 20

What does a cell, battery, Affect a current?

Answer 20

It generates current when a circuit is complete.

Question 21

How does a wire affect a current ?

Answer 21

The wire conducts current and often some resistance

Question 22

How does a lamp affect the current

Answer 22

It charges some electrical energy to light and heat, offers some resistance to the current

Question 23

How does the switch affect the current?

Answer 23

When closed, it conducts current, when open, air, an insulator, prevents current flow

Question 24

What does in series circuit mean?

Answer 24

In a series circuit all the components are in a line, look at your photos to know what this looks like. Battery and the two lamps are in line

Question 25

What does a parallel circuit mean

Answer 25

In a parallel circuit some components are range side-by-side, look on your camera roll to see what this looks like, two lamps are arranged in parallel

Question 26

The rate of elections that throw through a wire is measured in the unit called…?

Answer 26

Amps

Question 27

What do you use to measure the rate at which electrons though through a wire?

Answer 27

An ammeter

Question 28

Describe the symbol used for an ammeter on a circuit diagram

Answer 28

An A with a circle around it

Question 29

When an ammeter is placed in a circuit it’s positive terminal is connected to a Y that leads towards the…?

Answer 29

Positive terminal of the cell.

Question 30

Why is The amp meter is always connected in series

Answer 30

So that you get the amount of amps from the whole circuit

Question 31

When the current flowing in a wire reaches two wires with the same resistance in the parallel part of a circuit it…?

Answer 31

Splits equally

Question 32

The voltage is different in electrical potential, potential difference, between two points in a circuit and is measured in units called…? With a symbol…?Using a…?

Answer 32

Volts, V, Using a voltmeter

Question 33

What is the voltmeter connected to in a circuit? And what color is it

Answer 33

The positive terminal of the cell, red

Question 34

What does the negative terminal connect did too, and what color is it?

Answer 34

Wire that leads to the negative terminal of the cell, black

Question 35

Why Do The wires have to lead to the positive terminal And the negative terminal of the cell have to be attached the voltmeter?

Answer 35

So that the voltmeter is in parallel with the part of the circuit being tested.

Question 36

The voltmeter must always be In parallel with the…?Because…?

Answer 36

Lamp/bulb because the voltmeter is measuring the voltage across the lamp