Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 457 · 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.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) switch (b) cell (c) battery (d) junction
2. 2.🔘 Which kind of switch springs back when let go? (a) a toggle switch (b) a reed switch (c) a push button (d) a tilt switch
3. 3.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
4. 4.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) cell (b) ammeter (c) bulb (d) switch
5. 5.🔦 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 cotton thread. Does the bulb glow? (a) No (b) Yes
6. 6.True or false: a loudspeaker mainly makes movement. (a) False (b) True
7. 7.🔍 Which is the odd one out? (a) throw cells in a fire (b) stop if a part gets hot (c) stay away from pylons (d) build with an adult near
8. 8.🔌 Is a rubber band a conductor or an insulator? (a) an insulator (b) a conductor
9. 9.True or false: a circle with A inside is the symbol for a battery. (a) True (b) False
10. 10.True or false: a plastic straw is a conductor. (a) False (b) True
11. 11.🔋 6 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
12. 12.🔍 Which is the odd one out? (a) touch a switch when wet (b) stop if a part gets hot (c) open a phone charger (d) fly a kite near wires
13. 13.🔋 A 6 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
14. 14.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
15. 15.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
16. 16.Which of these is true of a series circuit? (a) many paths for current (b) each gets the full volts (c) a break stops every bulb (d) used in house wiring
17. 17.🔌 Most metals are good … (a) magnets only (b) batteries (c) insulators (d) conductors
18. 18.⚡ What does a traffic signal mainly change electricity into? (a) sound (b) light (c) heat (d) movement
19. 19.⚡ What does an electric drill mainly change electricity into? (a) heat (b) light (c) sound (d) movement
20. 20.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
21. 21.🔍 Which is the odd one out? (a) a copper wire (b) a plastic straw (c) a steel spoon (d) an iron nail
22. 22.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
23. 23.Which of these means the circuit is closed? (a) the switch is OFF (b) a wire has come loose (c) the switch is ON (d) a wire is cut
24. 24.💡 A battery lights 2 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
25. 25.True or false: a torch mainly makes sound. (a) True (b) False
26. 26.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
27. 27.💡 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. Bulb 3 is taken out of its holder. How many bulbs glow?
28. 28.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
29. 29.True or false: a slide switch slides side to side. (a) True (b) False
30. 30.🔘 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) No (b) Yes
31. 31.⚡ What does a mixer grinder mainly change electricity into? (a) heat (b) light (c) sound (d) movement
32. 32.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
33. 33.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a mains extension board (c) a wall socket (d) a small battery pack
34. 34.💡 3 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
35. 35.True or false: a small empty box is the symbol for a battery. (a) False (b) True
36. 36.⚡ What does a doorbell mainly change electricity into? (a) movement (b) heat (c) light (d) sound
37. 37.⚡ A cell changes stored chemical energy into which kind of energy? (a) electrical energy (b) wind energy (c) nuclear energy (d) sound energy
38. 38.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
39. 39.Which of these is safe? (a) open a phone charger (b) use a cable with cuts (c) use mains for a project (d) take cells out after use
40. 40.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True

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