Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 465 · 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.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?
2. 2.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the glass (c) the base (d) the filament
3. 3.🔍 Which is the odd one out? (a) a plastic straw (b) a plastic ruler (c) a dry cork (d) aluminium foil
4. 4.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
5. 5.True or false: a graphite rod is an insulator. (a) False (b) True
6. 6.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
7. 7.💡 3 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
8. 8.💡 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 3 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
9. 9.True or false: to stop if a part gets hot is safe. (a) False (b) True
10. 10.🔋 A 6 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
11. 11.True or false: a rice cooker mainly gives out light. (a) True (b) False
12. 12.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the metal tip (c) the steel shaft (d) the plastic handle
13. 13.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
14. 14.True or false: to take cells out after use is not safe. (a) True (b) False
15. 15.🔋 Does a battery give electricity or use electricity? (a) gives electricity (b) uses electricity
16. 16.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is OFF. Does the bulb glow? (a) Yes (b) No
17. 17.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
18. 18.🔍 Which is the odd one out? (a) an electric drill (b) a ceiling fan (c) a mixer grinder (d) a night lamp
19. 19.True or false: to fly a kite near wires is safe. (a) True (b) False
20. 20.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a copper wire across the gap. Does the bulb glow? (a) Yes (b) No
21. 21.🔍 Which is the odd one out? (a) build with an adult near (b) use mains for a project (c) touch a switch when wet (d) climb an electric pole
22. 22.🔘 Which kind of switch closes near a magnet? (a) a tilt switch (b) a slide switch (c) a reed switch (d) a toggle switch
23. 23.True or false: a line lifted at a gap is the symbol for a switch. (a) False (b) True
24. 24.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) none (c) it does not matter (d) both of them
25. 25.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
26. 26.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
27. 27.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
28. 28.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is ON, B is OFF, C is OFF and D is ON. Does the bulb glow? (a) No (b) Yes
29. 29.🔍 Which is the odd one out? (a) a traffic signal (b) a torch (c) a school bell (d) a night lamp
30. 30.🔍 Which is the odd one out? (a) use small battery cells (b) stay away from pylons (c) poke things in a socket (d) build with an adult near
31. 31.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
32. 32.🔘 When a switch is ON, the circuit is … (a) closed (b) broken (c) cut (d) open
33. 33.True or false: an LED lamp mainly gives out heat. (a) False (b) True
34. 34.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
35. 35.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) electric current (c) friction (d) a magnet
36. 36.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
37. 37.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
38. 38.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) Yes (b) No
39. 39.Which of these is a conductor? (a) a wooden stick (b) a rubber band (c) a paper strip (d) aluminium foil
40. 40.True or false: a reed switch closes near a magnet. (a) False (b) True

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