Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 618 · 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.🔌 Is a cotton thread a conductor or an insulator? (a) an insulator (b) a conductor
2. 2.What does a reed switch do? (a) closes when tipped over (b) closes near a magnet (c) flips up or down (d) stays where you flip it
3. 3.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
4. 4.Which of these is not safe? (a) stay away from pylons (b) dry your hands first (c) use mains for a project (d) use small battery cells
5. 5.🔋 8 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
6. 6.Which of these is a conductor? (a) a paper strip (b) a woollen thread (c) a plastic straw (d) a metal paper clip
7. 7.🔍 Which is the odd one out? (a) a steel spoon (b) an iron nail (c) a plastic straw (d) a brass key
8. 8.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) wire (b) battery (c) motor (d) bulb
9. 9.Which drawing is the symbol for a voltmeter? (a) a circle with V inside (b) a dot where wires meet (c) two equal parallel lines (d) a plain rectangle
10. 10.💡 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
11. 11.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
12. 12.Which of these is an insulator? (a) an iron nail (b) a graphite rod (c) a woollen thread (d) a copper wire
13. 13.🔍 Which is the odd one out? (a) build with an adult near (b) touch a switch when wet (c) stop if a part gets hot (d) fly kites in open fields
14. 14.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
15. 15.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) No (b) Yes
16. 16.True or false: a toggle switch flips up or down. (a) False (b) True
17. 17.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a long wire (c) a fuse or MCB (d) a plug top
18. 18.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
19. 19.Which of these gives us electricity? (a) a mobile phone (b) an air conditioner (c) a battery (d) a computer
20. 20.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) electric current (c) friction (d) a magnet
21. 21.Which drawing is the symbol for a wire? (a) a straight line (b) a circle with a cross (c) a circle with A inside (d) a circle with M inside
22. 22.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
23. 23.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
24. 24.🔘 Which kind of switch slides side to side? (a) a toggle switch (b) a slide switch (c) a tilt switch (d) a reed switch
25. 25.Which of these is not safe? (a) fly kites in open fields (b) use small battery cells (c) use a cable with cuts (d) stop if a part gets hot
26. 26.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
27. 27.Which of these gives us electricity? (a) a computer (b) a solar panel (c) a television (d) a refrigerator
28. 28.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
29. 29.Which drawing is the symbol for a cell? (a) a line lifted at a gap (b) one tall, one short bar (c) a circle with M inside (d) a circle with a cross
30. 30.🔘 When a switch is ON, the circuit is … (a) closed (b) open (c) broken (d) cut
31. 31.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 1.5 V (c) 230 V (d) 9 V
32. 32.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
33. 33.True or false: if a wire is cut, the circuit is closed and current flows. (a) True (b) False
34. 34.Which of these is safe? (a) fly a kite near wires (b) climb an electric pole (c) dry your hands first (d) touch a switch when wet
35. 35.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
36. 36.🔍 Which is the odd one out? (a) a safety pin (b) a steel spoon (c) aluminium foil (d) a cotton thread
37. 37.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
38. 38.🔋 A 12 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
39. 39.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
40. 40.Which of these mainly makes sound? (a) a room heater (b) a buzzer (c) a toaster (d) an LED lamp

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