Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 723 · 40 questions

Remember (Find the topic, use the idea): Find the topic: energy, safety, conductor, closed loop, switches, cells, symbols, series or parallel. Use that lesson’s idea — complete loop, all ON for series, cells add up, one path or many. For sums, write the working and check it again.

1. 1.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when either is ON (c) when both are OFF (d) when both are ON
2. 2.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in series (c) in parallel (d) not joined
3. 3.True or false: a circle with a cross is the symbol for a bulb. (a) True (b) False
4. 4.Which of these gives us electricity? (a) a refrigerator (b) a battery (c) a water pump (d) a mobile phone
5. 5.🔋 Does a water pump give electricity or use electricity? (a) gives electricity (b) uses electricity
6. 6.What does a tilt switch do? (a) closes when tipped over (b) closes near a magnet (c) stays where you flip it (d) flips up or down
7. 7.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
8. 8.🔋 4 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
9. 9.🔍 Which is the odd one out? (a) a toaster (b) a room heater (c) an electric iron (d) a loudspeaker
10. 10.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is a conductor (c) to make them heavy (d) plastic is an insulator
11. 11.Which of these is safe? (a) fly a kite near wires (b) climb an electric pole (c) keep drinks far away (d) use a cable with cuts
12. 12.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
13. 13.💡 3 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
14. 14.True or false: a toggle switch slides side to side. (a) True (b) False
15. 15.🔋 7 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
16. 16.Which of these mainly gives out heat? (a) an electric toy car (b) a loudspeaker (c) a buzzer (d) a rice cooker
17. 17.Which of these mainly gives out light? (a) an LED lamp (b) a rice cooker (c) an electric drill (d) an exhaust fan
18. 18.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
19. 19.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
20. 20.💡 2 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
21. 21.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
22. 22.🔘 Which kind of switch springs back when let go? (a) a push button (b) a tilt switch (c) a reed switch (d) a toggle switch
23. 23.True or false: “a single current path” is true of a series circuit. (a) True (b) False
24. 24.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
25. 25.Which of these is safe? (a) stay away from pylons (b) touch a fallen wire (c) fly a kite near wires (d) touch a switch when wet
26. 26.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) switch (b) battery (c) ammeter (d) diode
27. 27.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
28. 28.Which of these mainly gives out light? (a) a loudspeaker (b) a doorbell (c) a night lamp (d) an exhaust fan
29. 29.🔍 Which is the odd one out? (a) a dry cork (b) aluminium foil (c) a glass marble (d) a rubber eraser
30. 30.True or false: two equal parallel lines is the symbol for a capacitor. (a) True (b) False
31. 31.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the longer line (c) the shorter line (d) both lines
32. 32.🔋 How many 1.5 V cells must be joined in series to give 10.5 V?
33. 33.True or false: an iron nail is a conductor. (a) False (b) True
34. 34.🔌 Is a graphite rod a conductor or an insulator? (a) a conductor (b) an insulator
35. 35.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a wooden stick. Does the bulb glow? (a) Yes (b) No
36. 36.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
37. 37.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) each gets full voltage (d) to make bulbs dim
38. 38.🔘 A bulb and a cell are joined through 2 switches on 2 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
39. 39.Which of these is a conductor? (a) a safety pin (b) a plastic straw (c) a rubber band (d) a wooden stick
40. 40.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series

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