Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 56 · 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 should you do with used-up cells? (a) throw them in a fire (b) bury them in soil (c) cut them open (d) give them for recycling
2. 2.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
3. 3.🔘 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) No (b) Yes
4. 4.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) sound energy (b) light energy (c) chemical energy (d) movement energy
5. 5.💡 4 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
6. 6.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) Yes (b) No
7. 7.🔦 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) No (b) Yes
8. 8.True or false: two or more cell symbols is the symbol for a battery. (a) False (b) True
9. 9.True or false: a plastic straw is an insulator. (a) True (b) False
10. 10.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) an electric toy car (b) an exhaust fan (c) a rice cooker (d) a ceiling fan
12. 12.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is OFF. Does the bulb glow? (a) No (b) Yes
13. 13.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
14. 14.🔍 Which is the odd one out? (a) a ceiling fan (b) a traffic signal (c) a table fan (d) an electric drill
15. 15.🔋 Does a battery give electricity or use electricity? (a) uses electricity (b) gives electricity
16. 16.What does a tilt switch do? (a) closes near a magnet (b) closes when tipped over (c) stays where you flip it (d) slides side to side
17. 17.Which of these is true of a parallel circuit? (a) a single current path (b) one out, the rest glow (c) a break stops every bulb (d) one bulb out, all go out
18. 18.True or false: a reed switch closes near a magnet. (a) False (b) True
19. 19.Which of these uses electricity? (a) a wind turbine (b) a bicycle dynamo (c) a power station (d) a television
20. 20.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
21. 21.True or false: a ceramic cup is a conductor. (a) True (b) False
22. 22.Which drawing is the symbol for a switch? (a) a long and a short line (b) a circle with A inside (c) a straight line (d) a line lifted at a gap
23. 23.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
24. 24.Which of these is an insulator? (a) a graphite rod (b) a copper wire (c) a ceramic cup (d) a steel spoon
25. 25.🔍 Which is the odd one out? (a) stop if a part gets hot (b) open a phone charger (c) keep drinks far away (d) stay away from pylons
26. 26.🔍 Which is the odd one out? (a) use a cable with cuts (b) take cells out after use (c) stop if a part gets hot (d) use small battery cells
27. 27.True or false: a ceiling fan mainly gives out heat. (a) False (b) True
28. 28.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
29. 29.🔋 How many 2 V cells must be joined in series to give 14 V?
30. 30.True or false: a plastic straw is a conductor. (a) True (b) False
31. 31.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
32. 32.Which of these gives us electricity? (a) a washing machine (b) a computer (c) a refrigerator (d) a wind turbine
33. 33.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) to make it colourful (c) symbols are heavier (d) quick and clear for all
34. 34.🔘 A bulb and a cell are joined through 6 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
35. 35.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) it spoils the paint (c) water carries current (d) it is just untidy
36. 36.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
37. 37.Which of these is a conductor? (a) a wooden stick (b) a rubber band (c) a metal paper clip (d) a glass marble
38. 38.🔦 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
39. 39.Which of these is an insulator? (a) a steel coin (b) a graphite rod (c) an iron nail (d) a wooden stick
40. 40.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) both lines (c) the shorter line (d) neither line

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