Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 5 · 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.🔍 Which is the odd one out? (a) a steel spoon (b) a wooden stick (c) aluminium foil (d) a safety pin
2. 2.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
3. 3.🔋 A 12 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
4. 4.🔘 When a switch is ON, the circuit is … (a) open (b) broken (c) cut (d) closed
5. 5.Which drawing is the symbol for a battery? (a) two or more cell symbols (b) two equal parallel lines (c) a circle with a cross (d) a dot where wires meet
6. 6.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) a break stops every bulb (d) many paths for current
7. 7.True or false: a paper strip is an insulator. (a) False (b) True
8. 8.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
9. 9.🔍 Which is the odd one out? (a) an iron nail (b) a steel spoon (c) aluminium foil (d) a glass marble
10. 10.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
11. 11.⚡ What does an electric iron mainly change electricity into? (a) sound (b) light (c) heat (d) movement
12. 12.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?
13. 13.🔦 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) Yes (b) No
14. 14.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) No (b) Yes
15. 15.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) one (d) two
16. 16.True or false: a slide switch springs back when let go. (a) True (b) False
17. 17.Which of these mainly gives out heat? (a) a water heater (b) a mixer grinder (c) a street light (d) an exhaust fan
18. 18.Which of these mainly makes sound? (a) a school bell (b) a mixer grinder (c) an electric kettle (d) an electric iron
19. 19.🔌 Which metal is used for most electric wires at home? (a) copper (b) plastic (c) rubber (d) glass
20. 20.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
21. 21.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) LED (b) ammeter (c) resistor (d) junction
22. 22.Which drawing is the symbol for a battery? (a) one tall, one short bar (b) a dot where wires meet (c) a small empty box (d) many long-short pairs
23. 23.🔍 Which is the odd one out? (a) stop if a part gets hot (b) fly a kite near wires (c) take cells out after use (d) build with an adult near
24. 24.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
25. 25.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
26. 26.Which of these is safe? (a) touch a fallen wire (b) touch a switch when wet (c) stop if a part gets hot (d) open a phone charger
27. 27.🔋 How many 1.5 V cells must be joined in series to give 6 V?
28. 28.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
29. 29.⚠️ Is it safe to throw cells in a fire? (a) safe (b) not safe
30. 30.Which of these is not safe? (a) stop if a part gets hot (b) fly kites in open fields (c) stay away from pylons (d) fly a kite near wires
31. 31.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a safe circuit (b) an open circuit (c) a short circuit (d) a parallel circuit
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. A gap in one wire is bridged by a plastic straw. Does the bulb glow? (a) Yes (b) No
33. 33.⚡ What does a torch mainly change electricity into? (a) sound (b) light (c) heat (d) movement
34. 34.True or false: a long and a short line is the symbol for a motor. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) a torch (b) a street light (c) a night lamp (d) a loudspeaker
36. 36.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) chemical energy (c) light energy (d) sound energy
37. 37.🔦 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 brass key. Does the bulb glow? (a) Yes (b) No
38. 38.🔍 Which is the odd one out? (a) touch a switch when wet (b) climb an electric pole (c) stay away from pylons (d) use mains for a project
39. 39.🔍 Which is the odd one out? (a) use mains for a project (b) touch a fallen wire (c) climb an electric pole (d) build with an adult near
40. 40.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) wire (b) resistor (c) LED (d) battery

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