Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 731 · 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.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
2. 2.🔌 Is an iron nail a conductor or an insulator? (a) a conductor (b) an insulator
3. 3.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
4. 4.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
5. 5.True or false: if a cell is taken out, the circuit is open and no current flows. (a) True (b) False
6. 6.Which of these is a conductor? (a) aluminium foil (b) a dry cork (c) a plastic straw (d) a rubber eraser
7. 7.🔘 A bulb and a cell are joined through 2 switches on 2 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
8. 8.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
9. 9.True or false: a tube light mainly gives out heat. (a) False (b) True
10. 10.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
11. 11.Which of these gives us electricity? (a) a washing machine (b) a refrigerator (c) a wind turbine (d) a water pump
12. 12.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) wait and watch (c) shout for an adult (d) pour water on them
13. 13.True or false: “a single current path” is true of a series circuit. (a) False (b) True
14. 14.True or false: a copper wire is an insulator. (a) True (b) False
15. 15.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) quick and clear for all (c) to hide the circuit (d) to make it colourful
16. 16.Which of these mainly gives out heat? (a) a table fan (b) an electric toy car (c) an electric drill (d) an electric kettle
17. 17.🔍 Which is the odd one out? (a) a table fan (b) a mixer grinder (c) a doorbell (d) an exhaust fan
18. 18.True or false: a circle with M inside is the symbol for a motor. (a) True (b) False
19. 19.⚡ What does an electric kettle mainly change electricity into? (a) light (b) heat (c) movement (d) sound
20. 20.🔍 Which is the odd one out? (a) a glass marble (b) a wooden stick (c) a steel coin (d) a plastic straw
21. 21.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
22. 22.🔌 Is a dry cork a conductor or an insulator? (a) an insulator (b) a conductor
23. 23.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
24. 24.💡 6 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?
25. 25.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) each gets full voltage (d) to make bulbs dim
26. 26.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
27. 27.🔌 Most metals are good … (a) magnets only (b) batteries (c) conductors (d) insulators
28. 28.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
29. 29.True or false: a rice cooker mainly makes movement. (a) False (b) True
30. 30.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
31. 31.True or false: a woollen thread is a conductor. (a) False (b) True
32. 32.⚠️ Is it safe to touch a switch when wet? (a) safe (b) not safe
33. 33.True or false: if a wire is cut, the circuit is open and no current flows. (a) False (b) True
34. 34.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
35. 35.🔌 Which metal is used for most electric wires at home? (a) rubber (b) copper (c) plastic (d) glass
36. 36.True or false: to take cells out after use is safe. (a) True (b) False
37. 37.🔋 6 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
38. 38.What does a slide switch do? (a) works only while pressed (b) flips up or down (c) slides side to side (d) closes near a magnet
39. 39.Which of these is safe? (a) use mains for a project (b) keep drinks far away (c) poke things in a socket (d) use a cable with cuts
40. 40.🔌 Is a metal paper clip a conductor or an insulator? (a) a conductor (b) an insulator

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