Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 877 · 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 mainly gives out light? (a) a traffic signal (b) a loudspeaker (c) a toaster (d) a water heater
2. 2.True or false: a dry cork is a conductor. (a) False (b) True
3. 3.⚡ What does a night lamp mainly change electricity into? (a) movement (b) light (c) sound (d) heat
4. 4.Which of these gives us electricity? (a) a battery (b) an air conditioner (c) a water pump (d) a washing machine
5. 5.Which drawing is the symbol for a capacitor? (a) triangle, bar and arrows (b) a circle with an X in it (c) a circle with V inside (d) two equal parallel lines
6. 6.⚡ What does a loudspeaker mainly change electricity into? (a) movement (b) light (c) sound (d) heat
7. 7.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
8. 8.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the filament (c) the glass (d) the base
9. 9.🔦 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 graphite rod. Does the bulb glow? (a) No (b) Yes
10. 10.True or false: a torch mainly gives out heat. (a) True (b) False
11. 11.True or false: if a wire has come loose, the circuit is open and no current flows. (a) True (b) False
12. 12.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
13. 13.💡 4 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 2 and 3 are taken out of their holders. How many bulbs glow?
14. 14.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
15. 15.🔁 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) it does not matter (d) none
16. 16.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
17. 17.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. Does bulb 3 glow? (a) No (b) Yes
18. 18.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
19. 19.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
20. 20.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) when both are ON (c) when either is ON (d) never
21. 21.🔌 Which part of a screwdriver should an electrician hold? (a) the steel shaft (b) the metal tip (c) the bare end (d) the plastic handle
22. 22.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
23. 23.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) wait and watch (b) pour water on them (c) shout for an adult (d) pull them by the hand
24. 24.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a slide switch (c) a push button (d) a tilt switch
25. 25.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) LED (b) wire (c) voltmeter (d) bulb
26. 26.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
27. 27.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
28. 28.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
29. 29.🔍 Which is the odd one out? (a) a glass marble (b) a steel spoon (c) a wooden stick (d) a paper strip
30. 30.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
31. 31.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
32. 32.🔌 Is a glass marble a conductor or an insulator? (a) an insulator (b) a conductor
33. 33.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic is an insulator (d) plastic makes current
34. 34.⚡ A cell changes stored chemical energy into which kind of energy? (a) electrical energy (b) sound energy (c) wind energy (d) nuclear energy
35. 35.🔌 Is a plastic ruler a conductor or an insulator? (a) an insulator (b) a conductor
36. 36.Which of these uses electricity? (a) a bicycle dynamo (b) a battery (c) a wind turbine (d) a computer
37. 37.🔘 When a switch is ON, the circuit is … (a) broken (b) open (c) closed (d) cut
38. 38.True or false: a circle with a cross is the symbol for a bulb. (a) False (b) True
39. 39.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) the longer line (d) both lines
40. 40.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open

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