Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 207 · 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.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) wait and watch (b) pour water on them (c) pull them by the hand (d) shout for an adult
2. 2.🔌 A gap of dry air between two wires acts as … (a) a cell (b) an insulator (c) a switch that is ON (d) a conductor
3. 3.🔋 How many 1.5 V cells must be joined in series to give 6 V?
4. 4.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
5. 5.True or false: triangle against a bar is the symbol for a bulb. (a) True (b) False
6. 6.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
7. 7.True or false: to stop if a part gets hot is safe. (a) False (b) True
8. 8.🔦 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 paper strip. Does the bulb glow? (a) Yes (b) No
9. 9.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic makes current (d) plastic is an insulator
10. 10.🔍 Which is the odd one out? (a) dry your hands first (b) climb an electric pole (c) fly kites in open fields (d) stop if a part gets hot
11. 11.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 12 V (c) 1.5 V (d) 9 V
12. 12.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
13. 13.Which of these mainly gives out light? (a) an electric toy car (b) a torch (c) a loudspeaker (d) a doorbell
14. 14.🔍 Which is the odd one out? (a) a plastic ruler (b) a metal paper clip (c) a paper strip (d) a glass marble
15. 15.Which of these is safe? (a) use mains for a project (b) touch a fallen wire (c) stay away from pylons (d) throw cells in a fire
16. 16.🔋 Does a refrigerator give electricity or use electricity? (a) uses electricity (b) gives electricity
17. 17.Which drawing is the symbol for a diode? (a) triangle against a bar (b) a long and a short line (c) a dot where wires meet (d) a circle with V inside
18. 18.Which of these is not safe? (a) take cells out after use (b) dry your hands first (c) fly kites in open fields (d) use a cable with cuts
19. 19.⚡ What does a torch mainly change electricity into? (a) light (b) movement (c) heat (d) sound
20. 20.🔍 Which is the odd one out? (a) use a cable with cuts (b) dry your hands first (c) use small battery cells (d) stop if a part gets hot
21. 21.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) dust particles (c) photons (d) water drops
22. 22.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) so all go off together (d) to make bulbs dim
23. 23.Which of these means the circuit is open? (a) all wires are joined (b) the switch is OFF (c) the loop is complete (d) the switch is ON
24. 24.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) when both are OFF (c) when both are ON (d) never
25. 25.🔘 Which kind of switch works only while pressed? (a) a tilt switch (b) a toggle switch (c) a slide switch (d) a push button
26. 26.True or false: a line lifted at a gap is the symbol for a resistor. (a) True (b) False
27. 27.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) straight lines (c) wavy lines (d) dotted circles
28. 28.🔦 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 plastic ruler. Does the bulb glow? (a) No (b) Yes
29. 29.🔍 Which is the odd one out? (a) an iron nail (b) a safety pin (c) a steel spoon (d) a cotton thread
30. 30.Which of these is not safe? (a) stop if a part gets hot (b) build with an adult near (c) climb an electric pole (d) stay away from pylons
31. 31.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) No (b) Yes
32. 32.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
33. 33.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
34. 34.🔘 When a switch is ON, the circuit is … (a) broken (b) closed (c) open (d) cut
35. 35.True or false: a dot where wires meet is the symbol for a junction. (a) True (b) False
36. 36.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
37. 37.⚡ What does a room heater mainly change electricity into? (a) movement (b) light (c) sound (d) heat
38. 38.🔍 Which is the odd one out? (a) a rubber eraser (b) a copper wire (c) a safety pin (d) an iron nail
39. 39.Which drawing is the symbol for a resistor? (a) a circle with M inside (b) a small empty box (c) many long-short pairs (d) triangle, bar and arrows
40. 40.What does a tilt switch do? (a) stays where you flip it (b) works only while pressed (c) closes when tipped over (d) flips up or down

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