Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 358 · 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 a conductor? (a) a glass marble (b) a woollen thread (c) a plastic ruler (d) an iron nail
2. 2.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) friction (c) a magnet (d) sound
3. 3.🔦 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
4. 4.Which drawing is the symbol for a wire? (a) triangle, bar and arrows (b) a small empty box (c) a straight line (d) a long and a short line
5. 5.🔋 4 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
6. 6.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) none (d) one
7. 7.💡 2 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. Does bulb 2 glow? (a) No (b) Yes
8. 8.💡 3 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
9. 9.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
10. 10.Which of these is a conductor? (a) a safety pin (b) a rubber band (c) a plastic straw (d) a rubber eraser
11. 11.⚡ A fan changes electrical energy mainly into which kind of energy? (a) sound energy (b) movement energy (c) chemical energy (d) light energy
12. 12.Which of these is an insulator? (a) an iron nail (b) a copper wire (c) a wooden stick (d) a graphite rod
13. 13.🔁 What must there be for a current to flow? (a) a plastic gap (b) a complete loop (c) one loose end (d) a broken path
14. 14.Which of these is not safe? (a) stay away from pylons (b) dry your hands first (c) touch a fallen wire (d) fly kites in open fields
15. 15.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
16. 16.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
17. 17.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
18. 18.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
19. 19.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
20. 20.Which of these is safe? (a) use mains for a project (b) climb an electric pole (c) stay away from pylons (d) poke things in a socket
21. 21.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
22. 22.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
23. 23.🔘 Which kind of switch flips up or down? (a) a tilt switch (b) a push button (c) a toggle switch (d) a slide switch
24. 24.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
25. 25.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) No (b) Yes
26. 26.True or false: a circle with a cross is the symbol for a battery. (a) True (b) False
27. 27.True or false: triangle against a bar is the symbol for a junction. (a) False (b) True
28. 28.Which of these mainly gives out light? (a) an electric toy car (b) a torch (c) a mixer grinder (d) a buzzer
29. 29.Which of these is true of a series circuit? (a) a single current path (b) many paths for current (c) each gets the full volts (d) used in house wiring
30. 30.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) little stars (c) wavy lines (d) straight lines
31. 31.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
32. 32.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
33. 33.💡 4 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?
34. 34.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) Yes (b) No
35. 35.True or false: a reed switch closes near a magnet. (a) True (b) False
36. 36.True or false: a rubber band is an insulator. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) a paper strip (b) a steel spoon (c) a steel coin (d) aluminium foil
38. 38.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
39. 39.Which drawing is the symbol for a junction? (a) a line lifted at a gap (b) one tall, one short bar (c) a circle with V inside (d) a dot where wires meet
40. 40.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a steel spoon. Does the bulb glow? (a) No (b) Yes

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