Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 113 · 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 parallel (side by side). When does the bulb glow? (a) only when both are ON (b) never (c) when either is ON (d) only when both are OFF
2. 2.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) the same voltage (c) no voltage (d) double the voltage
3. 3.Which of these is true of a parallel circuit? (a) one out, the rest glow (b) bulbs share the voltage (c) a single current path (d) one bulb out, all go out
4. 4.🔍 Which is the odd one out? (a) a graphite rod (b) a rubber band (c) a ceramic cup (d) a glass marble
5. 5.🔘 When a switch is ON, the circuit is … (a) open (b) closed (c) broken (d) cut
6. 6.🔘 Which kind of switch springs back when let go? (a) a tilt switch (b) a slide switch (c) a toggle switch (d) a push button
7. 7.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) a steel spoon (b) an iron nail (c) a metal paper clip (d) a plastic straw
9. 9.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
10. 10.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
11. 11.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) to save copper only (d) each gets full voltage
12. 12.True or false: to build with an adult near is safe. (a) False (b) True
13. 13.🔋 Does a television give electricity or use electricity? (a) gives electricity (b) uses electricity
14. 14.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is OFF, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
15. 15.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
16. 16.True or false: a reed switch closes near a magnet. (a) True (b) False
17. 17.Which of these means the circuit is open? (a) the loop is complete (b) a cell is taken out (c) the switch is ON (d) all wires are joined
18. 18.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
19. 19.Which drawing is the symbol for a battery? (a) a circle with A inside (b) two or more cell symbols (c) a circle with a cross (d) a straight line
20. 20.🔘 Two switches are in series. When does the bulb glow? (a) when both are ON (b) never (c) when both are OFF (d) when either is ON
21. 21.🔋 Does a water pump give electricity or use electricity? (a) gives electricity (b) uses electricity
22. 22.True or false: to touch a fallen wire is safe. (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) touch a fallen wire (b) stay away from pylons (c) dry your hands first (d) fly kites in open fields
24. 24.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) water carries current (c) it is just untidy (d) it spoils the paint
25. 25.Which of these mainly makes movement? (a) a night lamp (b) a mixer grinder (c) a buzzer (d) a room heater
26. 26.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
27. 27.🔍 Which is the odd one out? (a) keep drinks far away (b) fly kites in open fields (c) use mains for a project (d) build with an adult near
28. 28.True or false: a toggle switch stays where you flip it. (a) True (b) False
29. 29.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a brass key. Does the bulb glow? (a) Yes (b) No
30. 30.True or false: an exhaust fan mainly makes movement. (a) True (b) False
31. 31.What does a toggle switch do? (a) stays where you flip it (b) springs back when let go (c) works only while pressed (d) closes near a magnet
32. 32.What does a reed switch do? (a) closes near a magnet (b) flips up or down (c) slides side to side (d) stays where you flip it
33. 33.🔘 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) Yes (b) No
34. 34.True or false: a rubber eraser is a conductor. (a) True (b) False
35. 35.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
36. 36.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
37. 37.🔘 Which kind of switch closes near a magnet? (a) a slide switch (b) a reed switch (c) a tilt switch (d) a push button
38. 38.💡 2 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 2 is taken out of its holder. How many bulbs glow?
39. 39.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
40. 40.True or false: a torch mainly gives out light. (a) False (b) True

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