Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 898 · 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 drawing is the symbol for a cell? (a) two or more cell symbols (b) a line lifted at a gap (c) a long and a short line (d) a small empty box
2. 2.What does a slide switch do? (a) slides side to side (b) closes when tipped over (c) closes near a magnet (d) stays where you flip it
3. 3.True or false: one tall, one short bar is the symbol for a cell. (a) False (b) True
4. 4.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the switch is ON (d) a wire is cut
5. 5.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
6. 6.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the filament (c) the base (d) the switch
7. 7.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
8. 8.🔦 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
9. 9.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) dotted circles (c) straight lines (d) little stars
10. 10.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is OFF, C is OFF and D is ON. Does the bulb glow? (a) No (b) Yes
11. 11.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
12. 12.Which of these is true of a series circuit? (a) own switch for each bulb (b) one bulb out, all go out (c) many paths for current (d) used in house wiring
13. 13.True or false: a steel spoon is a conductor. (a) True (b) False
14. 14.True or false: a circle with M inside is the symbol for a wire. (a) False (b) True
15. 15.What does a tilt switch do? (a) closes near a magnet (b) works only while pressed (c) stays where you flip it (d) closes when tipped over
16. 16.Which of these is an insulator? (a) a copper wire (b) a metal paper clip (c) a brass key (d) a ceramic cup
17. 17.💡 In a series circuit, how many paths does the current have? (a) none (b) two (c) one (d) one for each bulb
18. 18.🔋 Does a bicycle dynamo give electricity or use electricity? (a) gives electricity (b) uses electricity
19. 19.Which of these is not safe? (a) use small battery cells (b) fly a kite near wires (c) stop if a part gets hot (d) take cells out after use
20. 20.⚡ What does an electric iron mainly change electricity into? (a) light (b) sound (c) movement (d) heat
21. 21.True or false: if a wire has come loose, the circuit is open and no current flows. (a) True (b) False
22. 22.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
23. 23.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) sound energy (b) light energy (c) chemical energy (d) movement energy
24. 24.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a push button (c) a reed switch (d) a slide switch
25. 25.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
26. 26.🔋 Does a refrigerator give electricity or use electricity? (a) uses electricity (b) gives electricity
27. 27.Which of these mainly makes movement? (a) an electric kettle (b) a mixer grinder (c) a rice cooker (d) a water heater
28. 28.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
29. 29.💡 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
30. 30.⚡ What do we call a flow of electric charge through a wire? (a) friction (b) electric current (c) sound (d) a magnet
31. 31.🔋 How many 3 V cells must be joined in series to give 12 V?
32. 32.⚡ What does a siren mainly change electricity into? (a) light (b) heat (c) movement (d) sound
33. 33.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) a break stops every bulb (d) many paths for current
34. 34.True or false: to touch a switch when wet is not safe. (a) False (b) True
35. 35.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
36. 36.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
37. 37.🔍 Which is the odd one out? (a) a metal paper clip (b) a plastic ruler (c) a rubber eraser (d) a woollen thread
38. 38.Which drawing is the symbol for an ammeter? (a) a circle with M inside (b) a line lifted at a gap (c) a circle with V inside (d) a circle with A inside
39. 39.🔘 A bulb and a cell are joined through 5 switches on 5 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?
40. 40.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids