S2 Electrical System Pre-Quiz

This is a/an ​ (a)   circuit.

• closed
• open

Analyse the diagram carefully.

Electric current (a)   flow through this circuit.

• cannot
• can

Answer explanation

The switch is opened!

Drag and drop to match the circuit symbol to its corresponding electrical component.​

• closed switch

• 
• connected wires

• 
• wire

• 
• open switch

• 

Answer explanation

Notice that a dot is used to show that the wires are connected.

Drag and drop to match the circuit symbol to its corresponding electrical component.​

• ammeter

• 
• cell

• 
• battery

• 
• bulb

• 
• voltmeter

• 

Answer explanation

Electrical cell is NOT the same as the basic unit of a living organism cell!

An electrical cell stores chemical potential energy, which can be converted to electrical energy in a closed circuit.

A battery = 2 cells!

Ammeter is used to measure the ​ (a)   in the circuit.

• electric current
• potential difference
• resistance

Voltmeter is used to measure the ​ (a)   in the circuit.

• potential difference
• electric current
• resistance

Drag and drop to match the circuit symbol and electrical component to its corresponding name.​

• fuse

• 
• fixed resistor

• 
• variable resistor

• 

Answer explanation

A fuse is a safety device that prevent current that is too high to pass through (i.e. the thin wire melts and opens the circuit).

Resistors are used to lower the amount of electric charges that can flow (helpful for controlling the amount of current flowing in the circuit).

Which of the following shows the correct circuit diagram?

• 
• 
• 
• 

Answer explanation

This is an open circuit.

Notice that the polarity (cell / battery terminals) is important too!

The rate of flow of charge is known as the

(a)  

• electric current
• resistance
• potential difference

The energy required to drive a unit charge through an electrical component is the ​ (a)  

• potential difference
• electrical current
• resistance