Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 353 · 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 of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) used in house wiring (d) a break stops every bulb
2. 2.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 1.5 V (c) 230 V (d) 0.5 V
3. 3.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) No (b) Yes
4. 4.Which drawing is the symbol for a wire? (a) triangle, bar and arrows (b) a straight line (c) triangle against a bar (d) a dot where wires meet
5. 5.Which drawing is the symbol for a switch? (a) a circle with a cross (b) a line lifted at a gap (c) a circle with an X in it (d) triangle against a bar
6. 6.True or false: a small empty box is the symbol for a battery. (a) False (b) True
7. 7.💡 3 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
8. 8.Which of these is an insulator? (a) an iron nail (b) a steel coin (c) a metal paper clip (d) a woollen thread
9. 9.Which of these is a conductor? (a) a paper strip (b) a dry cork (c) a wooden stick (d) a brass key
10. 10.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they keep glowing (d) they all go out
11. 11.True or false: a circle with V inside is the symbol for a diode. (a) True (b) False
12. 12.True or false: an electric iron mainly makes movement. (a) False (b) True
13. 13.🔋 Does a generator give electricity or use electricity? (a) gives electricity (b) uses electricity
14. 14.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
15. 15.True or false: a line lifted at a gap is the symbol for a cell. (a) False (b) True
16. 16.True or false: a night lamp mainly gives out light. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) a plastic ruler (b) a safety pin (c) a paper strip (d) a wooden stick
18. 18.🔘 Which kind of switch works only while pressed? (a) a tilt switch (b) a push button (c) a slide switch (d) a reed switch
19. 19.Which of these is a conductor? (a) a rubber eraser (b) an iron nail (c) a cotton thread (d) a dry cork
20. 20.Which of these means the circuit is closed? (a) all wires are joined (b) a wire is cut (c) a wire has come loose (d) the switch is OFF
21. 21.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
22. 22.🔍 Which is the odd one out? (a) a mixer grinder (b) a ceiling fan (c) a water heater (d) an electric drill
23. 23.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
24. 24.Which of these is a conductor? (a) a cotton thread (b) a plastic straw (c) a copper wire (d) a ceramic cup
25. 25.🔌 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
26. 26.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
27. 27.Which of these mainly gives out heat? (a) a water heater (b) an exhaust fan (c) a mixer grinder (d) an electric drill
28. 28.💡 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?
29. 29.True or false: to use a cable with cuts is safe. (a) True (b) False
30. 30.True or false: a rubber band is an insulator. (a) True (b) False
31. 31.True or false: a circle with an X in it is the symbol for a voltmeter. (a) False (b) True
32. 32.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a plug top (c) a fuse or MCB (d) a bulb
33. 33.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
34. 34.🔘 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 ON, C is ON and D is OFF. Does the bulb glow? (a) No (b) Yes
35. 35.Which of these mainly gives out light? (a) a tube light (b) a doorbell (c) an electric iron (d) a siren
36. 36.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
37. 37.Which of these is a conductor? (a) a plastic ruler (b) a steel spoon (c) a plastic straw (d) a dry cork
38. 38.🔘 Which kind of switch springs back when let go? (a) a push button (b) a toggle switch (c) a reed switch (d) a slide switch
39. 39.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) both of them (b) only one (c) none (d) it does not matter
40. 40.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) symbols are heavier (c) quick and clear for all (d) to make it colourful

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