Electricity and Magnetism

Presentation

•

Science

•

7th - 9th Grade

•

Practice Problem

•

Hard

•

NGSS

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

Standards-aligned

ahmad hafizul hanis mohd shahar

Used 62+ times

FREE Resource

10 Slides • 23 Questions

Electricity and Magnetism

Generation of Electricity

Transformer

Transmission & Distribution of Electricity

Calculate the Cost of Electricity Consumption

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

Renewable Energy

a source of energy whose suply is contineus and not exhaustive

Non-Renewable Energy

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

Multiple Select

Which of the following is a renewable energy?

Geo-thermal

Tide

Radioactive

Wave

Multiple Choice

Which of the following is renewable energy?

Petroleum

Natural Gas

Biomass

Coal

Fill in the Blanks

Name the major source of electric supply in Malaysia

Type answer...

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

Fill in the Blanks

Name the electric generator

Type answer...

Multiple Choice

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

Type of current

DC - Current flows in one direction
AC - Current that changes its flow to the opposite direction at fixed interval

Multiple Select

What are the similarities of AC and DC

Produce heat

produce magnetic field

suitable to step-up and step-down

can be measured

Multiple Select

Select the source of direct current

solar cell

dry cell

commutator dynamo

Multiple Select

What is the major problem in generating electricity?

depletion of fossil fuels

release of pollutants

Multiple Select

Which of the following is the pollutants that gives greenhouse effect

carbon monoxide

nitrogen dioxide

sulfur dioxide

hydrogen dioxide

Multiple Select

Power generation should...

easy to find

cheap

not polluting nature

Poll

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

easy to find

cheap

not polluting nature

Transformer

Step-up and step-down transformer
use of transformer in electrical appliances
solve numerical problem

Transformer

a tool that can raise or lower down voltage of alternating current
consists of laminated soft iron core and insulated conductor wire

Fill in the Blanks

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

Type answer...

Fill in the Blanks

transformer change

Type answer...

Multiple Choice

electrical appliances works with low voltage, so they need

step-up transformer

step-down transformer

Multiple Choice

what is the type of transformer?

step-up transformer

step-down transformer

Numerical Problem

$\frac{V_p}{V_s}\ =\ \frac{N_p}{N_s}$

Fill in the Blanks

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?

Type answer...

Fill in the Blanks

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?

Type answer...

Transmission and Distribution of Electricity

Multiple Choice

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

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

sound

heat

kinetic

potential

Open Ended

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

Type response here

Multiple Choice

name the type transformer used in switch zone

step-up transformer

step-down transformer

Multiple Choice

name the type transformer used in sub-station

step-up transformer

step-down transformer

Multiple Choice

What is the color of live wire

blue

yellow-green stripe

brown

Fill in the Blanks

Name the elctrical component attached to the live wire

Type answer...

Electricity and Magnetism

Generation of Electricity

Transformer

Transmission & Distribution of Electricity

Calculate the Cost of Electricity Consumption

Show answer

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