Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 639 · 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.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
2. 2.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
3. 3.Which of these is not safe? (a) fly a kite near wires (b) take cells out after use (c) fly kites in open fields (d) build with an adult near
4. 4.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
5. 5.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
6. 6.Which of these is not safe? (a) climb an electric pole (b) stay away from pylons (c) build with an adult near (d) dry your hands first
7. 7.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
8. 8.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
9. 9.🔘 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 OFF. Does the bulb glow? (a) No (b) Yes
10. 10.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
11. 11.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) both lines (c) the shorter line (d) neither line
12. 12.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) sound energy (b) light energy (c) chemical energy (d) movement energy
13. 13.Which of these means the circuit is closed? (a) a wire is cut (b) a wire has come loose (c) a cell is taken out (d) the loop is complete
14. 14.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
15. 15.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
16. 16.Which drawing is the symbol for an ammeter? (a) a plain rectangle (b) a circle with A inside (c) two or more cell symbols (d) a straight line
17. 17.True or false: aluminium foil is an insulator. (a) True (b) False
18. 18.🔋 4 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
19. 19.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
20. 20.True or false: a ceiling fan mainly makes movement. (a) False (b) True
21. 21.True or false: a graphite rod is an insulator. (a) True (b) False
22. 22.True or false: to poke things in a socket is not safe. (a) True (b) False
23. 23.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
24. 24.What does a push button do? (a) stays where you flip it (b) slides side to side (c) works only while pressed (d) flips up or down
25. 25.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
26. 26.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) no voltage (c) the same voltage (d) a smaller voltage
27. 27.Which of these means the circuit is open? (a) all wires are joined (b) a cell is taken out (c) the switch is ON (d) the loop is complete
28. 28.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 15 V (c) 1.5 V (d) 0.5 V
29. 29.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the glass (c) the filament (d) the base
30. 30.💡 6 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. Bulbs 1 and 6 are taken out of their holders. How many bulbs glow?
31. 31.🔋 2 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
32. 32.True or false: if a wire is cut, the circuit is closed and current flows. (a) False (b) True
33. 33.🔌 Most metals are good … (a) conductors (b) insulators (c) batteries (d) magnets only
34. 34.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) none (d) one
35. 35.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) No (b) Yes
36. 36.True or false: to take cells out after use is safe. (a) False (b) True
37. 37.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
38. 38.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
39. 39.💡 5 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. Bulbs 1 and 3 are taken out of their holders. How many bulbs glow?
40. 40.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 1 glow? (a) Yes (b) No

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