Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 88 · 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.💡 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) the same (c) brighter
2. 2.🔋 A 6 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
3. 3.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
4. 4.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
5. 5.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
6. 6.🔋 What is a battery? (a) two or more cells joined (b) a switch with a lid (c) one single wire (d) a kind of bulb
7. 7.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to make bulbs dim (c) to save copper only (d) so all go off together
8. 8.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 230 V (c) 1.5 V (d) 15 V
9. 9.🔍 Which is the odd one out? (a) a rubber band (b) aluminium foil (c) a steel coin (d) a safety pin
10. 10.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
11. 11.⚡ What does a table fan mainly change electricity into? (a) light (b) sound (c) heat (d) movement
12. 12.True or false: a circle with M inside is the symbol for a motor. (a) True (b) False
13. 13.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
14. 14.🔋 A 12 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
15. 15.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
16. 16.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
17. 17.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
18. 18.🔘 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 OFF, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
19. 19.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they all go out (c) they get dimmer (d) they explode
20. 20.What does a toggle switch do? (a) flips up or down (b) works only while pressed (c) springs back when let go (d) slides side to side
21. 21.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
22. 22.True or false: a plain rectangle is the symbol for a motor. (a) True (b) False
23. 23.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) only when both are ON (c) when either is ON (d) only when both are OFF
24. 24.🔋 Does a battery give electricity or use electricity? (a) uses electricity (b) gives electricity
25. 25.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) one (d) none
26. 26.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
27. 27.Which drawing is the symbol for a voltmeter? (a) many long-short pairs (b) a long and a short line (c) a circle with V inside (d) a plain rectangle
28. 28.💡 3 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
29. 29.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
30. 30.💡 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. Does bulb 3 glow? (a) Yes (b) No
31. 31.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) never (c) when both are OFF (d) when both are ON
32. 32.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) True (b) False
33. 33.True or false: triangle, bar and arrows is the symbol for an LED. (a) True (b) False
34. 34.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
35. 35.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
36. 36.🔋 What should you do with used-up cells? (a) bury them in soil (b) give them for recycling (c) throw them in a fire (d) cut them open
37. 37.True or false: a rubber eraser is an insulator. (a) True (b) False
38. 38.Which of these mainly gives out heat? (a) a toaster (b) a doorbell (c) a night lamp (d) an LED lamp
39. 39.Which of these is not safe? (a) take cells out after use (b) fly kites in open fields (c) dry your hands first (d) throw cells in a fire
40. 40.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes

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