Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 486 · 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.🔌 Is a dry cork a conductor or an insulator? (a) an insulator (b) a conductor
2. 2.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
3. 3.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a wall socket (c) an inverter socket (d) a small battery pack
4. 4.Which of these is a conductor? (a) a dry cork (b) a rubber band (c) an iron nail (d) a wooden stick
5. 5.🔋 4 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
6. 6.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
7. 7.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
8. 8.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) the switch is ON (c) a wire has come loose (d) the switch is OFF
9. 9.💡 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) brighter (c) the same
10. 10.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
11. 11.🔍 Which is the odd one out? (a) a metal paper clip (b) a copper wire (c) a dry cork (d) aluminium foil
12. 12.Which of these uses electricity? (a) a wind turbine (b) a cell (c) a washing machine (d) a battery
13. 13.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
14. 14.🔍 Which is the odd one out? (a) touch a switch when wet (b) use mains for a project (c) fly a kite near wires (d) take cells out after use
15. 15.💡 A battery lights 4 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
16. 16.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) motor (b) bulb (c) switch (d) resistor
17. 17.🔋 A 6 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
18. 18.True or false: a room heater mainly gives out light. (a) True (b) False
19. 19.Which of these is true of a parallel circuit? (a) a single current path (b) own switch for each bulb (c) one bulb out, all go out (d) bulbs share the voltage
20. 20.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
21. 21.True or false: an iron nail is an insulator. (a) False (b) True
22. 22.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
23. 23.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they get dimmer (c) they explode (d) they all go out
24. 24.💡 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. How many bulbs glow?
25. 25.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
26. 26.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
27. 27.⚡ What does a toaster mainly change electricity into? (a) movement (b) sound (c) heat (d) light
28. 28.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the base (c) the switch (d) the filament
29. 29.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) movement energy (c) sound energy (d) light energy
30. 30.💡 5 identical bulbs are joined in series with a 10 V battery (ideal wires). How many volts does each bulb get? =
31. 31.💡 6 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. How many bulbs glow?
32. 32.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
33. 33.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
34. 34.True or false: a toggle switch closes near a magnet. (a) False (b) True
35. 35.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
36. 36.Which of these mainly makes movement? (a) a siren (b) a room heater (c) a water heater (d) a table fan
37. 37.Which of these is true of a series circuit? (a) many paths for current (b) own switch for each bulb (c) each gets the full volts (d) a single current path
38. 38.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
39. 39.🔋 3 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
40. 40.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False

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