Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 192 · 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: “used in house wiring” is true of a series circuit. (a) False (b) True
2. 2.True or false: a slide switch closes when tipped over. (a) True (b) False
3. 3.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to save copper only (c) so all go off together (d) to make bulbs dim
4. 4.True or false: an iron nail is a conductor. (a) True (b) False
5. 5.True or false: a woollen thread is an insulator. (a) False (b) True
6. 6.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) wire (b) junction (c) diode (d) cell
7. 7.Which of these is an insulator? (a) a metal paper clip (b) a brass key (c) a plastic straw (d) a copper wire
8. 8.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
9. 9.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) motor (b) capacitor (c) voltmeter (d) bulb
10. 10.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a conductor (c) an insulator (d) a switch that is ON
11. 11.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) symbols are heavier (c) to make it colourful (d) quick and clear for all
12. 12.🔍 Which is the odd one out? (a) a night lamp (b) a tube light (c) a torch (d) a buzzer
13. 13.🔋 8 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
14. 14.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) wire (b) cell (c) junction (d) voltmeter
15. 15.🔋 How many 1.5 V cells must be joined in series to give 6 V?
16. 16.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
17. 17.Which of these is not safe? (a) touch a switch when wet (b) fly kites in open fields (c) take cells out after use (d) use small battery cells
18. 18.Which drawing is the symbol for a bulb? (a) triangle against a bar (b) a circle with a cross (c) triangle, bar and arrows (d) a long and a short line
19. 19.🔦 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 an iron nail. Does the bulb glow? (a) No (b) Yes
20. 20.⚡ What does a toaster mainly change electricity into? (a) light (b) heat (c) movement (d) sound
21. 21.Which of these uses electricity? (a) a wind turbine (b) a bicycle dynamo (c) a water pump (d) a battery
22. 22.🔦 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
23. 23.⚡ A cell changes stored chemical energy into which kind of energy? (a) electrical energy (b) sound energy (c) wind energy (d) nuclear energy
24. 24.Which of these is an insulator? (a) an iron nail (b) a steel spoon (c) a plastic ruler (d) aluminium foil
25. 25.Which of these is safe? (a) take cells out after use (b) touch a fallen wire (c) climb an electric pole (d) throw cells in a fire
26. 26.Which of these is an insulator? (a) aluminium foil (b) a glass marble (c) a metal paper clip (d) a steel spoon
27. 27.🔋 What should you do with used-up cells? (a) give them for recycling (b) bury them in soil (c) cut them open (d) throw them in a fire
28. 28.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) wavy lines (c) dotted circles (d) straight lines
29. 29.Which of these means the circuit is open? (a) a wire has come loose (b) all wires are joined (c) the switch is ON (d) the loop is complete
30. 30.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
31. 31.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
32. 32.Which of these is not safe? (a) fly kites in open fields (b) use small battery cells (c) touch a fallen wire (d) dry your hands first
33. 33.Which of these is true of a parallel circuit? (a) a single current path (b) many paths for current (c) bulbs share the voltage (d) one bulb out, all go out
34. 34.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a bulb (c) a fuse or MCB (d) a plug top
35. 35.🔋 A 9 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
36. 36.🔌 Is a wooden stick a conductor or an insulator? (a) an insulator (b) a conductor
37. 37.🔋 Does a computer give electricity or use electricity? (a) gives electricity (b) uses electricity
38. 38.Which drawing is the symbol for a wire? (a) triangle, bar and arrows (b) a small empty box (c) a straight line (d) two or more cell symbols
39. 39.🔍 Which is the odd one out? (a) a room heater (b) an electric toy car (c) a rice cooker (d) a toaster
40. 40.Which of these mainly gives out heat? (a) an electric kettle (b) a siren (c) a buzzer (d) a loudspeaker

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