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Electricity and Magnetism

Electricity and Magnetism

Assessment

Presentation

Science

7th - 9th Grade

Practice Problem

Hard

NGSS
HS-ETS1-3, HS-PS3-3, MS-ETS1-1

+5

Standards-aligned

Created by

ahmad hafizul hanis mohd shahar

Used 61+ times

FREE Resource

10 Slides • 23 Questions

1

Electricity and Magnetism

Generation of Electricity

Transformer

Transmission & Distribution of Electricity

Calculate the Cost of Electricity Consumption

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2

Generation of Electricity

Describe source in term of renewable and non-renewable energy

Explain the process of generating electricity

Differentiate between DC and AC

Solve problem related to electricity supply

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3

Renewable Energy

a source of energy whose suply is contineus and not exhaustive

4

Non-Renewable Energy

a source of energy whose supply will be exhausted, cannot be replaced nor aquired again

5

Multiple Select

Which of the following is a renewable energy?

1

Geo-thermal

2

Tide

3

Radioactive

4

Wave

6

Multiple Choice

Which of the following is renewable energy?

1

Petroleum

2

Natural Gas

3

Biomass

4

Coal

7

Fill in the Blank

Name the major source of electric supply in Malaysia

8

Electric Generator

  • a tool used to convert mechanical energy into electricity

  • electricity generated using electromagnetic induction

  • coil of wire moves while cutting magnetic field lines

  • producing alternating current

9

Fill in the Blank

Question image

Name the electric generator

10

Multiple Choice

Which of the following does not involves mechanical energy to electrical energy?

1
2
3
4

11

Type of current

  • DC - Current flows in one direction

  • AC - Current that changes its flow to the opposite direction at fixed interval

12

Multiple Select

What are the similarities of AC and DC

1

Produce heat

2

produce magnetic field

3

suitable to step-up and step-down

4

can be measured

13

Multiple Select

Select the source of direct current

1

solar cell

2

dry cell

3

commutator dynamo

14

Multiple Select

What is the major problem in generating electricity?

1

depletion of fossil fuels

2

release of pollutants

15

Multiple Select

Which of the following is the pollutants that gives greenhouse effect

1

carbon monoxide

2

nitrogen dioxide

3

sulfur dioxide

4

hydrogen dioxide

16

Multiple Select

Power generation should...

1

easy to find

2

cheap

3

not polluting nature

17

Poll

In your opinion, which of the following is the characteristics of a good energy source

easy to find

cheap

not polluting nature

18

Transformer

  • Step-up and step-down transformer

  • use of transformer in electrical appliances

  • solve numerical problem

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19

Transformer

  • a tool that can raise or lower down voltage of alternating current

  • consists of laminated soft iron core and insulated conductor wire

20

Fill in the Blank

step-up and step-down transformer only work with...

21

Fill in the Blank

transformer change

22

Multiple Choice

electrical appliances works with low voltage, so they need

1

step-up transformer

2

step-down transformer

23

Multiple Choice

Question image

what is the type of transformer?

1

step-up transformer

2

step-down transformer

24

Numerical Problem

  •  VpVs = NpNs\frac{V_p}{V_s}\ =\ \frac{N_p}{N_s}  

25

Fill in the Blank

a transformer has the number of turns of the primary and secondary coils as 50 and 250 turns respectively. If the transformer output voltage is 60 V, what is the input voltage?

26

Fill in the Blank

A transformer has the ability to change the power supply AC 2kW, 240 V to 60 V.

What is the ratio of the number of turn primary to secondary transformer?

27

Transmission and Distribution of Electricity

28

Multiple Choice

During transmission of electricity, energy might lost to the surrounding.

What is the form of energy that lost to the surrounding?

1

sound

2

heat

3

kinetic

4

potential

29

Open Ended

What is the advantage of increase the voltage and reduce current in the cable to provide the same power?

30

Multiple Choice

name the type transformer used in switch zone

1

step-up transformer

2

step-down transformer

31

Multiple Choice

name the type transformer used in sub-station

1

step-up transformer

2

step-down transformer

32

Multiple Choice

Question image

What is the color of live wire

1

blue

2

yellow-green stripe

3

brown

33

Fill in the Blank

Question image

Name the elctrical component attached to the live wire

Electricity and Magnetism

Generation of Electricity

Transformer

Transmission & Distribution of Electricity

Calculate the Cost of Electricity Consumption

Slide image

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