Electricity and electrical components

Electricity and electrical components

By Angela Toh

Multiple Choice

A battery converts what type of energy to another?

• sound to kinetic

• light to heat

• kinetic to electrical

• chemical to electrical

Multiple Choice

A device that converts electrical energy to light energy.

• A blender
• A light bulb
• A bicycle
• A balloon

Multiple Choice

What is the energy conversion when a wind turbine turns to provide energy to a power supply?

• electrical to potential

• potential to kinetic

• kinetic to electrical

• nuclear to heat

Multiple Choice

Name the Energy Conversion of a dryer.

• Chemical→ Thermal and Light

• Electrical → Elastic, Heat and Sound

• Gravitational → Nuclear, Sound and Heat

• Electrical → Heat, Kinetic and Sound

Multiple Choice

Is Iron a Conductor or Insulator?

• Conductor
• Insulator

Multiple Choice

What is the difference between a conductor and an insulator?

• An insulator allows electricity to flow through it easily and a conductor does not
• A conductor allows electricity to flow through it easily and an insulator does not.
• An insulator is magnetic and a conductor is not
• A conductor is magnetic and an insulator is not

Multiple Choice

A material that does NOT let electricity pass through it is called ...

• An electrical conductor

• An electrical insulator

• An electrical source

• An electric appliance

Multiple Choice

Why is electrical wiring usually made from copper?

• Because copper is shiny

• Because copper conducts electricity

• Because copper is not magnetic

• Because copper insulate electricity

Multiple Choice

Which of the following objects, when placed in a closed circuit, will cause the bulb to light up?

A: Copper wire  B: Plastic ruler
C: Wooden chopsticks   D: Iron nail

• A and B only
• C and D only
• A and D only 
• B and C only

Multiple Choice

Material W, X and Y is connected to an electric circuit one at a time, as shown in the diagram below.
Which of the following could materials W, X and Y be?

• W – ceramic
  X – cloth
  Y - Iron
• W – Steel
  X – glass
  Y - plastic
• W – aluminium
  X – copper
  Y - rubber
• W – iron
  X – copper
  Y - gold

Multiple Choice

Functions of switch

• To produce light

• To complete and break an electric circuit

• To supply electrical energy

Multiple Choice

Why we need dry cell in the electric circuit?

• To supply electrical energy

• To produce light

• To complete and break an electric circuit

Fill in the Blanks

This is a

.

(write in small letters)

Multiple Choice

5. Choose the correct symbol of a dry cell.

Multiple Choice

This is a/ an...

• zig zag

• Resistor

• Ammeter

• Battery

Multiple Choice

6. Choose the correct symbol of a bulb.

Multiple Choice

7. Choose the correct symbol of a wire.

Multiple Choice

8. Choose the correct symbol of a switch.

Draw

Draw the symbol of a variable resistor / rheostat.

Draw

Draw the symbol of ammeter.

Draw

Draw the symbol of bulb/lamp.

Draw

Draw the circuit diagram for this.

Draw

Draw the circuit diagram for this.

Draw

Draw the circuit diagram for this.

Draw

Draw the electric circuit using electrical symbols.

Multiple Choice

What is a circuit that only has ONE path for electricity to flow?

• series circuit

• closed circuit

• parallel circuit

• light bulb

Multiple Choice

What is a circuit with several paths for electricity to flow?

• conductor

• series circuit

• parallel circuit

• open circuit

Multiple Choice

A ______ opens and closes an electric circuit.

• conductor

• switch

• source

• insulator

Fill in the Blanks

Look at the open and closed circuit diagrams on page 5. Are those series or parallel circuit?

Multiple Choice

An incomplete circuit is shown.
To complete the circuit, a wire should be placed from —

• Point D to Point C
• Point B to Point C
• Point A to Point D
• Point B to Point D

Multiple Choice

Choose the correct sentence.

• This circuit will work because it is an open circuit.
• This circuit will work because it is a closed circuit.
• This circuit will NOT work because it is an open circuit.
• This circuit will NOT work because it is a closed circuit.

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Open Ended

The following circuit diagram shows one of the light bulbs not working/ fused. State and explain whether the other bulb will continue to work.

Multiple Choice

Which is NOT true of a series circuit

• One light bulb can be broken and other lights will still work.
• All loads are a single loop
• Adding more loads will lessen the current in the loop

Open Ended

Explain why it is useful for home circuits to be connected in a parallel arrangement. 

Multiple Choice

Why will the circuit above not light? *

• The cardboard is an insulator and will not allow the power to flow through to the bulb.

• The snaps are not connected

• The cardboard is a conductor and overpowers the circuit.

Multiple Choice

The battery pack is in a complete circuit but the bulb will not light. Why?

• The circuit is incomplete.

• The batteries are different brands.

• The batteries are in wrong.

Multiple Choice

What's wrong with the circuit?

• The light bulb is burnt out.

• There are not enough connectors.

• There is no energy source.

Multiple Choice

Why will only 1 bulb light but not the other? *

• because the batteries are in wrong.

• there is only 1 complete path that leads to one bulb.

• there are 2 complete circuits.