Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 124 · 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.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
2. 2.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a smaller voltage (c) the same voltage (d) a bigger voltage
3. 3.🔍 Which is the odd one out? (a) take cells out after use (b) climb an electric pole (c) use mains for a project (d) use a cable with cuts
4. 4.💡 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 2 and 3 are taken out of their holders. How many bulbs glow?
5. 5.🔦 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) Yes (b) No
6. 6.Which of these mainly makes movement? (a) an electric toy car (b) a loudspeaker (c) a street light (d) a rice cooker
7. 7.What does a push button do? (a) slides side to side (b) closes when tipped over (c) springs back when let go (d) flips up or down
8. 8.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
9. 9.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) wavy lines (c) dotted circles (d) straight lines
10. 10.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
11. 11.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
12. 12.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
13. 13.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
14. 14.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
15. 15.Which of these is true of a parallel circuit? (a) each gets the full volts (b) a single current path (c) bulbs share the voltage (d) one bulb out, all go out
16. 16.True or false: a plain rectangle is the symbol for a motor. (a) False (b) True
17. 17.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
18. 18.Which of these is not safe? (a) touch a switch when wet (b) dry your hands first (c) keep drinks far away (d) stay away from pylons
19. 19.True or false: a reed switch flips up or down. (a) False (b) True
20. 20.🔦 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 plastic straw. Does the bulb glow? (a) Yes (b) No
21. 21.True or false: a tube light mainly makes sound. (a) True (b) False
22. 22.⚡ What does an electric drill mainly change electricity into? (a) light (b) sound (c) heat (d) movement
23. 23.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) half the voltage (c) double the voltage (d) the same voltage
24. 24.💡 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. All the bulbs are in place. Does bulb 1 glow? (a) Yes (b) No
25. 25.True or false: a brass key is an insulator. (a) True (b) False
26. 26.True or false: if a wire is cut, the circuit is open and no current flows. (a) True (b) False
27. 27.🔋 A 9 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
28. 28.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
29. 29.🔘 Which kind of switch closes near a magnet? (a) a slide switch (b) a toggle switch (c) a push button (d) a reed switch
30. 30.🔦 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 ceramic cup. Does the bulb glow? (a) No (b) Yes
31. 31.💡 3 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 2 are taken out of their holders. How many bulbs glow?
32. 32.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
33. 33.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) capacitor (b) battery (c) ammeter (d) LED
34. 34.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
35. 35.🔍 Which is the odd one out? (a) a toaster (b) a water heater (c) an electric kettle (d) a mixer grinder
36. 36.True or false: a loudspeaker mainly gives out heat. (a) False (b) True
37. 37.Which of these is an insulator? (a) an iron nail (b) a graphite rod (c) a steel coin (d) a rubber band
38. 38.💡 4 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) Yes (b) No
39. 39.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
40. 40.🔘 Which kind of switch closes when tipped over? (a) a push button (b) a slide switch (c) a tilt switch (d) a reed switch

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