PSLE Science: Electricity Quiz

What is the main topic discussed in the video?

• Photosynthesis

• Electricity

• Gravity

• Magnetism

What happens to the circuit when switch S1 is closed?

• The circuit remains open

• The bulb lights up

• The iron ball moves

• The circuit short-circuits

What is the effect of closing both switches S1 and S2 on the iron ball?

• The iron ball melts

• The iron ball remains stationary

• The iron ball moves from A to B

• The iron ball disappears

What role does the electromagnet play in the circuit?

• It heats up the circuit

• It creates sound

• It powers the bulb

• It attracts the iron ball

What happens to the bulb when both switches are closed and the iron ball moves?

• The bulb remains off

• The bulb lights up continuously

• The bulb lights up and then turns off

• The bulb explodes

Why does the iron ball fall back to position A?

• The battery dies

• The circuit is permanently open

• The electromagnet loses its magnetism

• The bulb burns out

What is the behavior of the bulb during the repetitive cycle?

• It stays on

• It flickers randomly

• It stays off

• It switches on and off repeatedly

What causes the cycle of the iron ball's movement to repeat?

• The battery is replaced

• The circuit is reset manually

• The bulb is changed

• The closing and opening of the circuit

What is the final observation about the bulb's behavior?

• It remains off

• It dims gradually

• It remains on

• It switches on and off repeatedly

What is the main takeaway from the video?

• Exploring the history of electricity

• Understanding the behavior of circuits with switches

• Studying the effects of magnetism on plants

• Learning about different types of batteries