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Electricity and Circuits

1. What is the unit for electrical current?
 
 
 
 

2. circuit2In which of the circuits shown will the bulb (or bulbs) be the brightest?
 
 
 
 

3. circuit2In which of the circuits shown will the bulb (or bulbs) be the dimmest?
 
 
 
 

4. circuit2Which of the circuit diagrams shows two bulbs joined in parallel?
 
 
 
 

5. circuit2Which of the circuit diagrams shows two bulbs joined in series?
 
 
 
 

6. circuit4The circuit shows two bulbs and an open switch.
Both bulbs are on.

What will happen if the switch is closed?
 
 
 
 

7. circuit4The circuit shows two bulbs and a switch.
Both bulbs are on.

Is the switch OPEN or CLOSED?
 
 

8. circuit1 

Which of the lamps in the diagram will be on?
 
 
 
 

9. circuit3Look at the circuit diagram which shows 2 cells connected to three bulbs.
What would happen if we added an extra cell?

(Tick ALL that apply)
 
 
 
 

10. circuit3If I unscrewed bulb B from its holder what would happen to the other bulbs?
 
 
 
 

11. circuit3Look at the circuit diagram and say which of these statements is true.
 
 
 
 

12. Which of these substances aree electrical insulators?
 
 
 
 

13. circuit1bThe diagram shows a circuit containing two similar bulbs and a battery.

Which bulb will be brightest?
 
 
 

14. circuit1bThe diagram shows a circuit containing two similar bulbs and a battery.

If Bulb B is unscrewed what will happen to bulb A?
 
 
 
 

15. What happens to the current through a component if the voltage is increased?
 
 
 

16. Name an instrument for measuring the current in a circuit
 
 
 
 

17. Which of these substances are conductors of electricity?
(Tick all that appply)
 
 
 
 

18. Which of the following is NOT a metal but DOES conduct electricity?
 
 
 
 

19. The circuit below shows 3 lamps (P, Q and R) and 4 ammeters (A1, A2, A3 and A4)
The lamps are all similar to each other.

ammetersA1 reads 0.3A.

Will the reading of A4 be more than 0.3A, less than 0.3Aequal to 0.3A or zero amps?
 
 
 
 

20. The circuit below shows 3 lamps (P, Q and R) and 4 ammeters (A1, A2, A3 and A4)
The lamps are all similar to each other.

ammetersA1 reads 0.3A
If A2 reads 0.2amps what will be the reading on A3?
 
 
 
 

21. The circuit diagram shows 4 components represented by circuit symbols

circuit1Which of the symbols represents a LDR (light dependent resistor)?
 
 
 
 

22. The circuit diagram shows 4 components

circuit1What changes would you notice to this circuit if you placed your hand over component B making it darker?   (Tick all that apply)
 
 
 
 

23. variable-resistorWhat is the name of this component?
 
 
 
 

24. and-circuit-2What kind of circuit is this?
 
 
 
 

25. ledWhat component does this electrical symbol represent?
 
 
 
 

26. diodeWhat is the name of the component marked X and would the bulb be on or off?
 
 
 
 
 


 

william
william

thank you

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