Electrical Circuits

Identify this symbol

• single cell

• two cells

• three cells

• four cells

Select all statements that are true.

• It is a symbol for an ammeter.

• Ammeter measures current in a circuit.

• It is a symbol for a lamp.

• Ammeter measures mass of a circuit.

Describe this electrical circuit.

• It has two cells, three lamps and a switch.

• It has three cells, two lamps and a switch.

• It has two cells, three lamps and no switch.

• It has three cells, two lamps and no switch.

What will be the symbol for these electrical components?

• 
• 
• 
• 

Why is silver NOT used to make electrical wires?

• Because it is a poor conductor of electricity.

• Because it is cheap and can tarnish.

• Because it is a very good conductor of electricity.

• Because it is expensive and can tarnish.

Why is tungsten used as a filament in light bulbs?

• Because it can cause electrical energy to change to heat and light.

• Because intense temperature makes the filament glow brightly.

• Because it has very high meting point.

• All of the answers.

Identify the type of circuit in the picture.

• It is a straight circuit.

• It is a series circuit.

• It is a parallel circuit.

• It is a parallelogram circuit.

Jamila connects two bulbs and a cell. How can she increase the brightness of the bulb?

• Add another bulb to the series circuit.

• Add another cell to the series circuit.

• Remove the cell from the series circuit.

• Add a motor to the series circuit.

These materials are electrical insulators.

• aluminium

• fabric

• diamond

• gold

• glass

The picture shows some...

• materials that allow electricity to flow through them easily.

• good conductors

• poor conductors

• insulators

• materials which do not allow electricity to flow through them