HW P4 CH.8 ELECTRIC CIRCUIT

An electric circuit can consist of all the following objects except for a ________.

• Bulb

• Battery

• Wire

• Wooden rod

We need ________ for electric current to flow through a circuit.

• A close switch and a bulb

• An open switch and a battery

• An open switch and a bulb

• A close switch and a battery

How do we make the lamp brighter in a circuit?

• Add another cell

• Add another lamp

• Add another switch

• Make the wire longer

Which of the following is an electrical insulator?

• Metal knife

   

• Copper wire

    

• Plastic spoon

• Aluminium foil

Which of the following is the power source in the circuit?

• Battery

• Light bulb

• Wire

• Switch

How do we make the lamp dimmer in a circuit?

• Add another cell

• Add another lamp

• Add another switch

• Make the wire longer

Class 4 students make a circuit using two lamps, a cell, a closed switch and wires.

Which diagram shows the circuit made by the students?

• 
• 
• 
• 

Which one material is the conductor?

• Glass

• Water

• Plastic

• Copper

Will this circuit light the bulbs?

• Yes, both will light up

• Yes, but only one on the left

• Yes, but only the one on the right

• No, neither of the bulbs will light up

When a switch in electrical circuit is open, Then the circuit is . . . .

 

• Turning lights on

    

• Working and gives energy

   

• Continue their electric current

• Broken and charges cannot flow