SCS Year 7 Electricity

What does this symbol represent?

• A variable resistor

• A Voltmeter

• A Motor

• A Light dependent resistor

Which switch or switches must be closed to make the lamps light?

• Neither

• Switch 1

• Switch 2

• Both 1 and 2

If lamp 1 is unscrewed from its holder, what will happen to lamp 2?

• It will go out

• It will get brighter

• It will get duller

• It will stay the same brightness

If lamp 1 is unscrewed from its holder, what will happen to lamp 2?

• It will stay lit

• It will go out

• It will get dimmer

• It will get brighter

What is wrong with this circuit diagram?

• There is only one cell

• The lamp won't light

• The cell is the wrong way around

• The ammeter should be connected in series

Which ammeter will take the largest current reading?

• They will both be the same

• Ammeter 1

• Ammeter 2

• Ammeters do not read current

What is the reading on voltmeter V₁ if the reading on V₂ = 9Vand V₃ = 3V?

• 27V

• 3V

• 9V

• 12V

What are the readings on ammeters A₁ and A₄ if the readings on A₂ = 2V and A₃ = 2V?

• A₁ = 2V and A₄ = 2V

• A₁ = 4V and A₄ = 2V

• A₁ = 2V and A₄ = 4V

• A₁ = 4V and A₄ = 4V

The ratings for four typical domestic appliance fuses are 3A, 5A, 8A and 13A. Which fuse wires will melt if a current of 9A is passed through them?

• 3A, 5A, 8A and 13A

• 3A, 5A and 8A only

• 3A only

• 3A and 5A only

What is resistance?

• An increase in voltage

• Opposition to current

• Energy from battery

• An increase in current