Grade 8 Technology M31/32

The following are alternative sources of energy:

• Wood

  Coal

  Elecricity

• Candle

  Petrol

  LPG

• Wood

  Paraffin

  LPD

• All of them

Eskom supplies ... of electricity to the country,

• 50%

• 80%

• 95%

• 80%

Solar power is an alternative form of energy.

• True

• False

An.......... is a device that can generate electrical energy from chemical reactions

• energychemical cell

• electromagnetic cell

• electrochemical cell

....also known as galvanic cells, use chemical reactions to create electrical energy.

• Voltaic cells

• Voltmeter cells

• solar cells

.....cells use electrical energy to create a chemical reaction.

• Solar

• Voltaic

• Electrolytic

When cells are in ...........the voltage increases if the number of cells increases.

• both

• parallel

• series

If cells are in ........., adding more cells does not necessarily increase the voltage of cells in the circuit. So the brightness of a bulb will remain the same.

• parallel

• series

• both

The cells below are in parallel

• 
•