Physics

Question 1

What is static electricity?

Answer 1

an imbalance of electric charges that remains stationary on the surface of an object

Question 2

What is electric force?

Answer 2

Opposite charge attract and like charges repel

Question 3

The laws of static charges

Answer 3

object with the same charge repel each other, objects with the same charges attract each other, charged object attract neutral objects

Question 4

charging by friction, induction and conduction

Answer 4

rubbing, touching and putting very close together

Question 5

electrostatic paint sprayers and how they work

Answer 5

The paint is given a charge as it leaves the nozzle of the sprayer, and the object to be painted is given the opposite charge, the charged paint particles are attracted to the object , which minimizes the amount of

Question 6

2 types of electroscopes and how they work

Answer 6

Metal leaf: the electro shower
pith ball

Question 7

Grounding

Answer 7

Involves transferring electrons between objects in the Earth.

Question 8

Charging objects temporarily/permanently by induction

Answer 8

By bringing a charged object to a neutral object very close but not touching it

Question 9

Differences between conductor and insulators ( all as per PPT notes)

Answer 9

Conductor let electrons pass through and insulator stop electron from passing through them

Question 10

Be able to provide specific examples of conductors and insulators

Answer 10

Copper, sliver
Insulator: rubber or plastic

Question 11

Why do we experience more electric shocks in winter?

Answer 11

Because in the winter the air is more dryer

Question 12

What is resistance

Answer 12

The force that slows down a current

Question 13

What is current

Answer 13

The Flow of electrons

Question 14

What is voltage

Answer 14

the difference in electric potential energy between two different points on the circuit

Question 15

How many watts are in a kilowatt

Answer 15

1000 watts

Question 16

What is an ammeter

Answer 16

Symbol with an A it measures current in the circuit

Question 17

What is a voltmeter

Answer 17

Symbol with a V it measures the voltage

Question 18

If electrons flow through a circuit, the switch must be?

Answer 18

Closed which makes it on

Question 19

What is a resistor

Answer 19

Slow down the flow of electrons

Question 20

What is the difference between renewable energy sources and non-renewable energy sources

Answer 20

Renewable are self sustaining energy sources and non-renewable sources can only be used once

Question 21

What is electricity

Answer 21

A form of energy made from electrons

Question 22

Ohm’s law

Answer 22

The relationship among voltage (V) , current (I) , and resistance (R) can be written mathematically as an equation: R= V dvivdi by I

Question 23

How to calculate current and voltage in series and parallel circuits? What are the rules? Know the formulas.

Answer 23

Take total and divide it by the amount of lights

Question 24

What are the factors that affect resistance? Know them and be able explain how they work.

Answer 24

material some materials have more resistance than others, length longer wires have a greater resistance, thickness the thicker it is the greater the resistance, Heating a wire increases resistance

Question 25

Be able to explain the electrostatic series and how the table works – as per our lab

Answer 25

A chart organize on the tendency to gain or lose electrons

Question 26

Explain the differences between parallel and series circuit

Answer 26

A series circuit is a continues line and a parallel circuit multiple path ways

Question 27

Know how to calculate the efficiency of a device

Answer 27

Output divided by input times 100

Question 28

Cos to operate – know how to calculate

Answer 28

Time x power used x cost of electricity