Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 233 · 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 of these is safe? (a) use mains for a project (b) use small battery cells (c) open a phone charger (d) poke things in a socket
2. 2.Which of these is not safe? (a) open a phone charger (b) stop if a part gets hot (c) use small battery cells (d) build with an adult near
3. 3.Which drawing is the symbol for a capacitor? (a) a dot where wires meet (b) a small empty box (c) two equal parallel lines (d) a circle with M inside
4. 4.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
5. 5.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
6. 6.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
7. 7.🔋 A 9 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
8. 8.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
9. 9.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to make bulbs dim (c) to save copper only (d) so all go off together
10. 10.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
11. 11.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
12. 12.True or false: a push button works only while pressed. (a) False (b) True
13. 13.True or false: if a wire has come loose, the circuit is open and no current flows. (a) False (b) True
14. 14.🔦 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 metal paper clip. Does the bulb glow? (a) Yes (b) No
15. 15.⚡ What does a rice cooker mainly change electricity into? (a) heat (b) sound (c) movement (d) light
16. 16.🔋 6 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
17. 17.Which of these uses electricity? (a) a solar panel (b) a power station (c) a bicycle dynamo (d) a computer
18. 18.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
19. 19.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) bulb (b) voltmeter (c) motor (d) LED
20. 20.🔋 3 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
21. 21.🔋 3 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
22. 22.🔍 Which is the odd one out? (a) a glass marble (b) a rubber band (c) a steel spoon (d) a plastic ruler
23. 23.Which of these is not safe? (a) keep drinks far away (b) poke things in a socket (c) stay away from pylons (d) use small battery cells
24. 24.True or false: a ceiling fan mainly makes movement. (a) False (b) True
25. 25.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a small battery pack (c) a wall socket (d) a mains extension board
26. 26.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
27. 27.⚡ What does a tube light mainly change electricity into? (a) heat (b) movement (c) sound (d) light
28. 28.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) one (d) none
29. 29.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is ON, C is OFF and D is OFF. Does the bulb glow? (a) Yes (b) No
30. 30.Which of these is an insulator? (a) a brass key (b) a safety pin (c) a rubber band (d) a steel coin
31. 31.Which of these is safe? (a) use a cable with cuts (b) climb an electric pole (c) poke things in a socket (d) keep drinks far away
32. 32.🔍 Which is the odd one out? (a) a wooden stick (b) a safety pin (c) a steel spoon (d) a copper wire
33. 33.True or false: a steel coin is a conductor. (a) False (b) True
34. 34.Which of these gives us electricity? (a) a television (b) a computer (c) an air conditioner (d) a wind turbine
35. 35.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) a stranger online (c) nobody (d) a younger child
36. 36.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 0.5 V (c) 15 V (d) 1.5 V
37. 37.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
38. 38.True or false: to touch a fallen wire is not safe. (a) False (b) True
39. 39.What does a reed switch do? (a) closes near a magnet (b) flips up or down (c) works only while pressed (d) slides side to side
40. 40.Which of these is an insulator? (a) aluminium foil (b) a safety pin (c) a plastic straw (d) a steel spoon

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