Electrical System

What is part D?

• filament 
• glass bulb
• metal tip
• metal casing 

What is part B?

• filament 
• glass bulb
• metal tip
• metal casing 

What is part C made of?

• plastic
• glass 
• metal 
• rubber

When the bulb is connected to a battery by wires, the current flows into the bulb along the path __________________.

• A , B , C , D
• A , D , C , B
• D , A , B , C
• C, B, D, A

Study the diagrams. Which of the following bulbs will light up when the switch is closed?

• 1
• 2
• 3
• 1 and 2 only

Larissa set up three electrical circuits using identical batteries and identical bulbs as shown below. The batteries and bulbs are all working properly.
Arrange the bulbs in the order of increasing brightness. 

• A, B, Z, C
• C, Z, B, A
• C, A, B, Z
• C, B, Z, A

Bulb Z in the circuit fused after a while. Explain what you will observe for Bulb B.

• Bulb B will continue to light up.
• Bulb B will not light up.
• Bulb B will light up even brighter. 
• Bulb B will fuse also.

Study the set-ups below.
Which of the following bulbs with light up?

• A and B only 
• B and C only 
• A, and C only
• A, B and C

The diagram below shows a battery. 
The parts X and Y are known as the _____________ of the battery respectively.

• north and south poles
• positive and negative terminals
• negative and positive terminals

When electricity passes through a bulb, the bulb produces ______________.

• heat energy only
• light energy only
• heat and light energy