Electrical System

Study the circuit diagram below.

Which one of the following will make each bulb in the circuit less bright?

• Removing one bulb from the circuit

• Removing the switch from the circuit

• Adding one bulb in series to the circuit

• Adding one battery in series to the circuit

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

Tags

NGSS.MS-PS2-3

When the circuit shown is closed, none of the bulb lights up in the circuit above. Only one of the objects, A, B or C is an electrical insulator. Which one is it?

• A
• B
• C

Study the circuit diagram below. 
When the switch was closed, all the bulbs lighted up. Then, when one of the bulbs fused, all the bulbs went off. Which bulb was fused?

• A
• B
• C
• D

A battery has 2 ends called __________ and ___________ end.

• up, down

• north, south

• open, close

• positive, negative

Which of these is NOT a part of the bulb?

• glass bulb

• metal filament

• metal tip

• copper connector

John just bought a new torchlight and he put in 2 new batteries. However, it does not work. Which of the following could be a possible reason why the torch does not work?

• the bulb has fused

• the wires are not connected properly

• the batteries are placed wrongly

The diagrams below show 4 electrical circuits. The battery and bulb used in each circuit are identical and in working condition. In which one of the circuits will the bulb light up?

• Option 1

• Option 2

• Option 3

• Option 4

What do you call a circuit with a gap?

• False circuit

• Closed circuit

• Open circuit

• True circuit

Which of these objects can electricity pass through it?

• Eraser

• Glass Marble

• Ice-cream stick

• Paper clip