Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 665 · 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.⚡ What does a doorbell mainly change electricity into? (a) heat (b) light (c) movement (d) sound
2. 2.Which of these is not safe? (a) keep drinks far away (b) stop if a part gets hot (c) open a phone charger (d) take cells out after use
3. 3.⚡ What does a room heater mainly change electricity into? (a) sound (b) movement (c) light (d) heat
4. 4.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
5. 5.🔋 3 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.🔘 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 ON, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
7. 7.💡 4 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
8. 8.🔍 Which is the odd one out? (a) aluminium foil (b) an iron nail (c) a glass marble (d) a copper wire
9. 9.🔌 Most metals are good … (a) insulators (b) magnets only (c) conductors (d) batteries
10. 10.⚠️ Who should be with you when you build a circuit? (a) a younger child (b) a stranger online (c) nobody (d) a trusted adult
11. 11.🔘 What does a switch do in a circuit? (a) opens or closes the loop (b) stores current (c) makes electricity (d) changes the voltage
12. 12.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
13. 13.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) sound energy (c) movement energy (d) chemical energy
14. 14.🔌 Is an iron nail a conductor or an insulator? (a) a conductor (b) an insulator
15. 15.Which of these means the circuit is closed? (a) a wire has come loose (b) the loop is complete (c) the switch is OFF (d) a wire is cut
16. 16.🔍 Which is the odd one out? (a) a steel coin (b) a brass key (c) a metal paper clip (d) a wooden stick
17. 17.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) all wires are joined (d) a wire has come loose
18. 18.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to hide the circuit (c) quick and clear for all (d) to make it colourful
19. 19.🔍 Which is the odd one out? (a) a steel spoon (b) a ceramic cup (c) a copper wire (d) aluminium foil
20. 20.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they explode (d) they keep glowing
21. 21.True or false: a brass key is a conductor. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) aluminium foil (b) a brass key (c) a rubber eraser (d) a metal paper clip
23. 23.Which drawing is the symbol for a switch? (a) a line lifted at a gap (b) a circle with a cross (c) a circle with M inside (d) many long-short pairs
24. 24.Which of these is true of a series circuit? (a) used in house wiring (b) each gets the full volts (c) bulbs share the voltage (d) own switch for each bulb
25. 25.🔍 Which is the odd one out? (a) open a phone charger (b) dry your hands first (c) fly a kite near wires (d) poke things in a socket
26. 26.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic is an insulator (d) plastic makes current
27. 27.💡 3 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. Does bulb 1 glow? (a) No (b) Yes
28. 28.True or false: many long-short pairs is the symbol for a battery. (a) True (b) False
29. 29.🔦 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
30. 30.True or false: a circle with a cross is the symbol for a motor. (a) True (b) False
31. 31.🔘 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
32. 32.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. Does bulb 5 glow? (a) No (b) Yes
33. 33.🔘 When a switch is ON, the circuit is … (a) open (b) cut (c) broken (d) closed
34. 34.🔋 Does a generator give electricity or use electricity? (a) gives electricity (b) uses electricity
35. 35.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
36. 36.🔦 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 copper wire. Does the bulb glow? (a) No (b) Yes
37. 37.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
38. 38.🔍 Which is the odd one out? (a) fly a kite near wires (b) climb an electric pole (c) touch a switch when wet (d) take cells out after use
39. 39.🔋 6 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)? =
40. 40.True or false: a circle with M inside is the symbol for a bulb. (a) False (b) True

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