Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 809 · 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.True or false: a copper wire is an insulator. (a) False (b) True
2. 2.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
3. 3.True or false: to take cells out after use is not safe. (a) True (b) False
4. 4.Which of these mainly gives out light? (a) a rice cooker (b) a mixer grinder (c) a tube light (d) a room heater
5. 5.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) Yes (b) No
6. 6.🔌 Is a glass marble a conductor or an insulator? (a) an insulator (b) a conductor
7. 7.💡 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?
8. 8.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
9. 9.🔍 Which is the odd one out? (a) use mains for a project (b) use a cable with cuts (c) build with an adult near (d) fly a kite near wires
10. 10.Which of these is safe? (a) throw cells in a fire (b) touch a fallen wire (c) use small battery cells (d) use a cable with cuts
11. 11.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) movement energy (c) sound energy (d) chemical energy
12. 12.🔌 Is a cotton thread a conductor or an insulator? (a) an insulator (b) a conductor
13. 13.Which of these gives us electricity? (a) a battery (b) an air conditioner (c) a water pump (d) a computer
14. 14.True or false: an iron nail is an insulator. (a) True (b) False
15. 15.🔘 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 ON and C is OFF. Does the bulb glow? (a) Yes (b) No
16. 16.True or false: to use mains for a project is not safe. (a) True (b) False
17. 17.Which of these is not safe? (a) use small battery cells (b) dry your hands first (c) take cells out after use (d) fly a kite near wires
18. 18.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
19. 19.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the metal tip (c) the steel shaft (d) the bare end
20. 20.Which drawing is the symbol for a voltmeter? (a) a small empty box (b) triangle against a bar (c) many long-short pairs (d) a circle with V inside
21. 21.🔋 How many 1.5 V cells must be joined in series to give 6 V?
22. 22.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) electrons (c) dust particles (d) water drops
23. 23.💡 4 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?
24. 24.🔋 What is a battery? (a) a kind of bulb (b) a switch with a lid (c) one single wire (d) two or more cells joined
25. 25.💡 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 3 and 4 are taken out of their holders. How many bulbs glow?
26. 26.🔍 Which is the odd one out? (a) a plastic ruler (b) a dry cork (c) a paper strip (d) a steel spoon
27. 27.🔘 Which kind of switch slides side to side? (a) a reed switch (b) a tilt switch (c) a slide switch (d) a push button
28. 28.What does a toggle switch do? (a) slides side to side (b) works only while pressed (c) flips up or down (d) closes near a magnet
29. 29.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
30. 30.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
31. 31.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
32. 32.Which of these mainly makes sound? (a) a tube light (b) a street light (c) a doorbell (d) a rice cooker
33. 33.🔍 Which is the odd one out? (a) a loudspeaker (b) an electric toy car (c) an electric drill (d) a table fan
34. 34.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
35. 35.True or false: a tilt switch closes near a magnet. (a) True (b) False
36. 36.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
37. 37.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
38. 38.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
39. 39.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
40. 40.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False

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