Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 190 · 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 circle with A inside? (a) ammeter (b) switch (c) diode (d) junction
2. 2.True or false: a copper wire is an insulator. (a) False (b) True
3. 3.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
4. 4.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
5. 5.True or false: if all wires are joined, the circuit is closed and current flows. (a) True (b) False
6. 6.Which of these is a conductor? (a) a ceramic cup (b) a glass marble (c) a cotton thread (d) an iron nail
7. 7.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
8. 8.Which of these gives us electricity? (a) a computer (b) a refrigerator (c) a power station (d) a water pump
9. 9.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) never (c) only when both are OFF (d) when either is ON
10. 10.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) LED (b) motor (c) diode (d) bulb
11. 11.🔌 Most metals are good … (a) magnets only (b) conductors (c) batteries (d) insulators
12. 12.True or false: a dot where wires meet is the symbol for a motor. (a) True (b) False
13. 13.Which of these means the circuit is closed? (a) the switch is OFF (b) the switch is ON (c) a wire is cut (d) a cell is taken out
14. 14.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water carries current (c) it spoils the paint (d) water makes it cold
15. 15.Which of these is a conductor? (a) a woollen thread (b) a glass marble (c) a steel spoon (d) a ceramic cup
16. 16.Which of these means the circuit is closed? (a) a wire has come loose (b) all wires are joined (c) the bulb is unscrewed (d) the switch is OFF
17. 17.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
18. 18.Which of these is an insulator? (a) a brass key (b) a ceramic cup (c) a steel coin (d) a graphite rod
19. 19.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) the loop is complete (d) a wire has come loose
20. 20.Which of these means the circuit is open? (a) a wire is cut (b) all wires are joined (c) the loop is complete (d) the switch is ON
21. 21.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
22. 22.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) water drops (c) dust particles (d) photons
23. 23.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) sound energy (c) light energy (d) movement energy
24. 24.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
25. 25.Which of these gives us electricity? (a) a water pump (b) a cell (c) a washing machine (d) a mobile phone
26. 26.💡 3 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?
27. 27.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
28. 28.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
29. 29.Which of these is not safe? (a) keep drinks far away (b) throw cells in a fire (c) dry your hands first (d) build with an adult near
30. 30.What does a tilt switch do? (a) springs back when let go (b) closes near a magnet (c) flips up or down (d) closes when tipped over
31. 31.💡 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 5 are taken out of their holders. How many bulbs glow?
32. 32.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) when both are ON (c) when both are OFF (d) never
33. 33.⚡ What does a traffic signal mainly change electricity into? (a) heat (b) light (c) movement (d) sound
34. 34.Which of these uses electricity? (a) a generator (b) a battery (c) a bicycle dynamo (d) a television
35. 35.True or false: a tilt switch flips up or down. (a) False (b) True
36. 36.💡 5 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
37. 37.🔍 Which is the odd one out? (a) a wooden stick (b) a steel coin (c) a graphite rod (d) a steel spoon
38. 38.🔍 Which is the odd one out? (a) a torch (b) a toaster (c) an electric kettle (d) an electric iron
39. 39.True or false: a slide switch slides side to side. (a) True (b) False
40. 40.🔦 A circuit has a new 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 steel spoon. Does the bulb glow? (a) Yes (b) No

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