Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 563 · 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: a night lamp mainly makes movement. (a) True (b) False
2. 2.🔋 3 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
3. 3.🔍 Which is the odd one out? (a) fly kites in open fields (b) touch a fallen wire (c) stay away from pylons (d) use small battery cells
4. 4.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a bigger voltage (c) a smaller voltage (d) the same voltage
5. 5.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) so all go off together (d) to save copper only
6. 6.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
7. 7.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
8. 8.Which of these gives us electricity? (a) a washing machine (b) a cell (c) a water pump (d) a computer
9. 9.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
10. 10.Which of these is a conductor? (a) aluminium foil (b) a wooden stick (c) a plastic ruler (d) a paper strip
11. 11.🔌 Most metals are good … (a) insulators (b) batteries (c) magnets only (d) conductors
12. 12.Which of these mainly gives out light? (a) a toaster (b) a traffic signal (c) an exhaust fan (d) a loudspeaker
13. 13.🔍 Which is the odd one out? (a) fly a kite near wires (b) stay away from pylons (c) use mains for a project (d) open a phone charger
14. 14.Which of these mainly makes sound? (a) a torch (b) a toaster (c) a tube light (d) a loudspeaker
15. 15.⚡ What does an electric iron mainly change electricity into? (a) light (b) sound (c) heat (d) movement
16. 16.🔍 Which is the odd one out? (a) a ceiling fan (b) an electric toy car (c) a torch (d) an electric drill
17. 17.💡 6 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 1 and 3 are taken out of their holders. Does bulb 5 glow? (a) Yes (b) No
18. 18.🔦 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 dry cork. Does the bulb glow? (a) Yes (b) No
19. 19.True or false: a loudspeaker mainly makes movement. (a) False (b) True
20. 20.Which of these is not safe? (a) open a phone charger (b) stop if a part gets hot (c) take cells out after use (d) use small battery cells
21. 21.True or false: if a wire has come loose, the circuit is closed and current flows. (a) True (b) False
22. 22.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
23. 23.Which drawing is the symbol for a motor? (a) triangle, bar and arrows (b) a circle with a cross (c) a long and a short line (d) a circle with M inside
24. 24.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
25. 25.Which of these is a conductor? (a) a plastic ruler (b) a steel coin (c) a rubber band (d) a woollen thread
26. 26.🔋 What should you do with used-up cells? (a) give them for recycling (b) cut them open (c) bury them in soil (d) throw them in a fire
27. 27.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they explode (d) they get dimmer
28. 28.🔍 Which is the odd one out? (a) use small battery cells (b) dry your hands first (c) build with an adult near (d) touch a switch when wet
29. 29.🔘 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 ON. Does the bulb glow? (a) No (b) Yes
30. 30.True or false: a siren mainly makes sound. (a) True (b) False
31. 31.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) not joined (d) in series
32. 32.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
33. 33.True or false: to fly a kite near wires is safe. (a) False (b) True
34. 34.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
35. 35.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
36. 36.True or false: a dot where wires meet is the symbol for a junction. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) poke things in a socket (b) fly a kite near wires (c) fly kites in open fields (d) open a phone charger
38. 38.Which of these is true of a series circuit? (a) used in house wiring (b) each gets the full volts (c) one out, the rest glow (d) a break stops every bulb
39. 39.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
40. 40.🔋 Does a bicycle dynamo give electricity or use electricity? (a) gives electricity (b) uses electricity

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