Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 496 · 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.Which drawing is the symbol for a wire? (a) two or more cell symbols (b) a circle with M inside (c) many long-short pairs (d) a straight line
2. 2.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
3. 3.Which drawing is the symbol for an ammeter? (a) two or more cell symbols (b) triangle against a bar (c) a long and a short line (d) a circle with A inside
4. 4.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) little stars (c) straight lines (d) wavy lines
5. 5.🔍 Which is the odd one out? (a) take cells out after use (b) fly kites in open fields (c) use a cable with cuts (d) stop if a part gets hot
6. 6.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
7. 7.True or false: to throw cells in a fire is safe. (a) False (b) True
8. 8.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) a younger child (c) nobody (d) a stranger online
9. 9.🔍 Which is the odd one out? (a) build with an adult near (b) stop if a part gets hot (c) fly kites in open fields (d) throw cells in a fire
10. 10.Which of these is a conductor? (a) a wooden stick (b) a woollen thread (c) an iron nail (d) a rubber eraser
11. 11.🔦 A circuit has a used-up (dead) 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 woollen thread. Does the bulb glow? (a) Yes (b) No
12. 12.True or false: if all wires are joined, the circuit is closed and current flows. (a) True (b) False
13. 13.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they explode (d) they keep glowing
14. 14.🔘 A bulb and a cell are joined through 6 switches on 6 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?
15. 15.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) each gets full voltage (d) to save copper only
16. 16.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is ON, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
17. 17.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 230 V (c) 15 V (d) 1.5 V
18. 18.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
19. 19.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
20. 20.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
21. 21.Which of these is a conductor? (a) a plastic ruler (b) a paper strip (c) a safety pin (d) a dry cork
22. 22.Which of these mainly gives out light? (a) a doorbell (b) a rice cooker (c) a room heater (d) a tube light
23. 23.Which drawing is the symbol for a battery? (a) triangle, bar and arrows (b) one tall, one short bar (c) a line lifted at a gap (d) two or more cell symbols
24. 24.Which of these gives us electricity? (a) a computer (b) an air conditioner (c) a generator (d) a refrigerator
25. 25.✏️ In a circuit diagram, which part is drawn as a straight line? (a) wire (b) voltmeter (c) battery (d) bulb
26. 26.What does a slide switch do? (a) slides side to side (b) stays where you flip it (c) works only while pressed (d) flips up or down
27. 27.True or false: to stop if a part gets hot is not safe. (a) False (b) True
28. 28.🔋 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)? =
29. 29.⚡ A cell changes stored chemical energy into which kind of energy? (a) electrical energy (b) wind energy (c) nuclear energy (d) sound energy
30. 30.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
31. 31.True or false: if a wire is cut, the circuit is closed and current flows. (a) False (b) True
32. 32.Which of these is safe? (a) touch a fallen wire (b) open a phone charger (c) throw cells in a fire (d) use small battery cells
33. 33.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the steel shaft (c) the bare end (d) the plastic handle
34. 34.Which of these is a conductor? (a) a steel spoon (b) a cotton thread (c) a paper strip (d) a rubber eraser
35. 35.True or false: to use mains for a project is safe. (a) True (b) False
36. 36.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is ON, C is ON and D is ON. Does the bulb glow? (a) Yes (b) No
37. 37.Which of these is safe? (a) touch a switch when wet (b) build with an adult near (c) open a phone charger (d) use a cable with cuts
38. 38.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
39. 39.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) chemical energy (c) movement energy (d) sound energy
40. 40.🔍 Which is the odd one out? (a) aluminium foil (b) a dry cork (c) a steel spoon (d) a copper wire

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