Choose the correct alternative.

1. Which of the following is a source of electric tension?

conductor
light bulb
insulant
battery
generator

2. Which of the following materials conducts electricity the best?

plastic
wood
metal
glass
porcelain

3. What kind of a resistor can you use to create light?

motor
light bulb
speaker
magnet
buzzer

4. How many poles must a circuit have for it to work?

zero
one
two
three
four

5. When a circuit is closed,

a light bulb does not light up.
electricity cannot travel through the circuit.
the circuit does not have enough poles.
the circuit does not have enough insulation.
electricity can travel through the circuit.

6. When the circuit is open,

the light bulb lights up.
electricity cannot travel through the circuit.
the circuit has enough poles.
the circuit does not have enough insulation.
electricity can travel through the circuit.

7. Which of the following materials is a good source of insulation?

copper
aluminium
gold
plastic
silver

8. Which of the following is a source of electric tension?

separator
generator
curator
pastor
traitor

9. Which of the following devices uses a small electronic circuit?

a tractor
a snowmobile
a motorbike
a laptop computer
a microwave oven

10. Which of the following devices uses a medium-sized electronic circuit?

a motorbike
a refrigerator
a hairdryer
a dishwasher
a washing machine