S2 Electricity and circuits

1. S2 Electricity and circuits To begin click the button below Revision Quiz

2. Instructions • You will see a series of questions on the last topic • Click on the answer you think is correct • Some pages use underlined answers, some use buttons or pictures

3. Question 1 • If a substance allows electricity to flow through it, we call it … A Conductor Electrical An Insulator

4. Unlucky! • Sorry that’s not correct, try again. • If you want to start again, go back to the start page

5. Well Done! • That’s right, if a substance can carry electricity we call it a conductor. • A substance that can’t carry electricity is called an insulator.

6. Question 2 • In this series circuit below, if one bulb goes out, the other bulb Gets brighter Goes Out Blows

7. Well Done! • That’s right, in a series circuit, if one component breaks, all the others will go out too.

8. Question 3 • In a parallel circuit like the one below, if one bulb blows, the others stay on, this is because The bulbs need less energy to work There is another path for current to flow

9. Well Done! • That’s correct, in a PARALLEL circuit, there is more than one path for the current to flow • Also, if one component breaks, the rest stay on

10. Question 4 • If you increase the number of bulbs in a series circuit, the bulbs will Stay the same brightness Get dimmer Get brighter

11. Well Done! • That’s right, in a SERIES circuit, adding more bulbs makes them dimmer • In a PARALLEL circuit, adding more bulbs has no effect on their brightness

12. Question 5 • Which meter is used to measure current? Ammeter Ohm meter Voltmeter

13. Well Done! • That’s right, we use an ammeter to measure current • Current is measured in amperes or amps (A)

14. Question 6 • Which Diagram shows the correct way to connect an ammeter?

15. Well Done! • Ammeters must be connected in series • Increasing the current will give a bigger reading on the ammeter and make a bulb brighter

16. Question 7 • Voltage is the amount of energy carried by the charges round the circuit • We measure voltage using what? Voltmeter ohmmeter ammeter

17. Well Done! • We use a voltmeter to measure voltage • We connect a voltmeter across a component – in parallel

18. Question 8 • Current is related to resistance, if you have a high current you will have High resistance Low resistance

19. Well Done! • High current = Low resistance • Low current = high resistance

20. What unit is current measured in? Amps Ohms Volts

21. Correct! That was an easy one…. Current is measured in Amps with the unit symbol A Click to continue

22. No! Volts is the unit of measure of the voltage! Try again

23. Incorrect! Ohms is not a measure of current… it’s the measure of resistance Try again

24. The circuit below shows two bulbs in ? Series Parallel

25. Correct! The bulbs are connected in series with each other.

26. Wrong! The bulbs are connected in a single continuous circuit… a series circuit!

27. In the circuit below which bulbs will be lit when the switch is open? Both bulbs Neither bulb Bulb 1 only

28. No… If the switch is open there is not a complete circuit and so no current will flow. Neither bulb will light

29. Good! If the switch is open there is no current flowing so neither bulb will light. Carry on…

30. If the reading on ammeter 1 is 1A what will be the reading on ammeter2 if the bulbs are considered identical? 0A 0.5A 1A

31. Incorrect! In a series circuit the current is the same at all points Try again..

32. Correct! The current measured at any point will be the same in a series circuit. Continue..

33. What is the reading on the voltmeter if the bulbs are identical? 18V 9V 4.5V

34. In a series circuit if the bulbs are identical the battery voltage will be divided evenly between them.. Try again

35. Well done! The battery voltage of 9V will be split evenly between the two bulbs. Carry on..

36. In the parallel circuit below, with identical resistors, what will be the reading on the voltmeter? 6V 3V 12V

37. Yes! The voltage across each branch of the circuit will be equal to the battery voltage. Continue

38. Oops! Remember the voltage across each branch of a parallel circuit is equal to the battery voltage. Try again

39. If all the resistors are identical what will be the reading on the ammeter? 1A 3A 9A

40. For the same circuit what will be the reading on the voltmeter? 4V 36V 12V

41. Incorrect! The sum of currents in the branches will equal the current drawn from the supply.

42. Correct! The sum of currents in the branches equal the supply current so the current in each branch must be 1 amp. Continue

43. No!! In a parallel circuit the voltage across each branch equals the battery voltage! Try again

44. Very good! The voltage across the resistor must equal the battery voltage.. 12V Carry on..

45. How could you increase the strength of an electromagnet ? Decrease the current through the wires Increase the number of coils around the core Remove the core

46. That’s wrong !! Without a core the electromagnet would not work Decreasing the current would decrease its strength Try again

47. Very good! The electromagnet’s strength is increased by increasing the number of coils

48. Congratulations!! • You’ve finished the quiz! • You can do the quiz again if you want • Revise to be prepared for your test • Start again End