REVISION SAINS TAHUN 5 BAB 5: ELEKTRIK

Select the correct energy transformation for the electrical energy source shown in the image

What is the similarity between a power station and a dynamo?

• Converts kinetic energy into chemical energy

• Converts chemical energy into electrical energy

• Converts kinetic energy into electrical energy

• Can be recharged

What is the meaning of a complete circuit?

• There is an electric current flowing

• There is no electric current flowing

• Switch is open

• Components in a complete circuit

The electrical component above represents the symbol

• Bulb

• Switch

• Connecting wire

• Dry cell

What affects the brightness of a bulb in an electric circuit?

• P and Q only

• P and R only

• Q and R only

• R and S only

The diagram above shows an electric circuit. Which switch needs to be closed to light up bulbs R and U?

• Switch A and B

• Switch A and C

• Switch B, C and D

• Switch A, B and D

Rajah menunjukkan terlalu banyak plag peralatan elektrik disambungkan pada satu soket. Mengapakah amalan yang ditunjukkan di atas sangat tidak digalakkan?

• Boleh merosakkan soket

• Boleh menyebabkan litar pintas

• Boleh merosakkan peralatan elektrik

• Menggunakan banyak tenaga elektrik

Rajah menunjukkan satu gambar rajah litar.
Antara yang berikut, yang manakah akan berlaku apabila mentol Z terbakar?

• Hanya mentol X akan menyala

• Hanya mentol Y akan menyala

• Mentol X dan Y akan terus menyala

• Mentol X dan Y tidak akan menyala

Rajah menunjukkan satu litar elektrik. X mewakili.....

• 
• 
• 
• 

If a dry cell is removed from the circuit, predict what will happen?

• The bulb will shine brighter

• The bulb will remain the same

• The bulb will shine dimmer

• The bulb will not light up