Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 950 · 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.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) a conductor (c) a cell (d) an insulator
2. 2.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
3. 3.Which of these uses electricity? (a) a solar panel (b) a power station (c) a washing machine (d) a generator
4. 4.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
5. 5.🔍 Which is the odd one out? (a) fly a kite near wires (b) use a cable with cuts (c) touch a switch when wet (d) fly kites in open fields
6. 6.⚡ A solar panel changes which kind of energy into electricity? (a) wind energy (b) sound energy (c) light energy (d) chemical energy
7. 7.Which of these is safe? (a) open a phone charger (b) stop if a part gets hot (c) throw cells in a fire (d) touch a switch when wet
8. 8.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) both lines (c) the longer line (d) the shorter line
9. 9.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
10. 10.🔋 2 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
11. 11.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) photons (c) electrons (d) water drops
12. 12.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) wavy lines (c) little stars (d) dotted circles
13. 13.Which of these means the circuit is closed? (a) a wire has come loose (b) a wire is cut (c) the switch is OFF (d) the switch is ON
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 not safe? (a) fly a kite near wires (b) build with an adult near (c) take cells out after use (d) use small battery cells
16. 16.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) No (b) Yes
17. 17.🔋 How many 3 V cells must be joined in series to give 21 V?
18. 18.🔘 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 OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
19. 19.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
20. 20.True or false: to use mains for a project is safe. (a) True (b) False
21. 21.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
22. 22.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
23. 23.🔦 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
24. 24.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
25. 25.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
26. 26.🔍 Which is the odd one out? (a) stop if a part gets hot (b) use small battery cells (c) dry your hands first (d) throw cells in a fire
27. 27.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) it does not matter (c) only one (d) both of them
28. 28.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) water carries current (c) it is just untidy (d) water makes it cold
29. 29.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they keep glowing (d) they get dimmer
30. 30.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) chemical energy (c) sound energy (d) movement energy
31. 31.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
32. 32.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
33. 33.✏️ In a circuit diagram, which part is drawn as a straight line? (a) battery (b) motor (c) switch (d) wire
34. 34.🔌 Is a ceramic cup a conductor or an insulator? (a) a conductor (b) an insulator
35. 35.🔍 Which is the odd one out? (a) a steel spoon (b) a wooden stick (c) a dry cork (d) a rubber eraser
36. 36.🔘 Which kind of switch closes near a magnet? (a) a tilt switch (b) a push button (c) a reed switch (d) a slide switch
37. 37.Which of these is an insulator? (a) a safety pin (b) a steel spoon (c) a rubber band (d) an iron nail
38. 38.Which of these gives us electricity? (a) a television (b) a cell (c) a water pump (d) a washing machine
39. 39.🔋 What is a battery? (a) one single wire (b) a switch with a lid (c) a kind of bulb (d) two or more cells joined
40. 40.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel

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