Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 32 · 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.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
2. 2.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
3. 3.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
4. 4.🔘 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 OFF and B is ON. Does the bulb glow? (a) Yes (b) No
5. 5.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
6. 6.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
7. 7.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
8. 8.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) it is just untidy (c) water carries current (d) it spoils the paint
9. 9.Which drawing is the symbol for a diode? (a) a circle with A inside (b) triangle against a bar (c) many long-short pairs (d) a line lifted at a gap
10. 10.⚡ A solar panel changes which kind of energy into electricity? (a) wind energy (b) sound energy (c) light energy (d) chemical energy
11. 11.Which of these mainly gives out heat? (a) a buzzer (b) an electric toy car (c) a torch (d) a rice cooker
12. 12.🔋 Does an air conditioner give electricity or use electricity? (a) uses electricity (b) gives electricity
13. 13.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) a cell is taken out (d) all wires are joined
14. 14.True or false: to dry your hands first is not safe. (a) False (b) True
15. 15.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
16. 16.Which of these mainly makes sound? (a) a torch (b) a tube light (c) a ceiling fan (d) a school bell
17. 17.Which drawing is the symbol for an ammeter? (a) a circle with a cross (b) one tall, one short bar (c) a small empty box (d) a circle with A inside
18. 18.True or false: if a wire has come loose, the circuit is open and no current flows. (a) False (b) True
19. 19.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is ON, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
20. 20.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
21. 21.⚡ What does a street light mainly change electricity into? (a) movement (b) sound (c) heat (d) light
22. 22.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
23. 23.What does a slide switch do? (a) slides side to side (b) closes when tipped over (c) closes near a magnet (d) flips up or down
24. 24.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) one (d) none
25. 25.True or false: many long-short pairs is the symbol for a junction. (a) True (b) False
26. 26.Which of these is true of a series circuit? (a) own switch for each bulb (b) one bulb out, all go out (c) used in house wiring (d) one out, the rest glow
27. 27.Which of these uses electricity? (a) a power station (b) a battery (c) a solar panel (d) a refrigerator
28. 28.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a metal paper clip. Does the bulb glow? (a) Yes (b) No
29. 29.🔘 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
30. 30.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 12 V (c) 230 V (d) 9 V
31. 31.🔘 Which kind of switch closes when tipped over? (a) a toggle switch (b) a tilt switch (c) a slide switch (d) a reed switch
32. 32.🔘 Which kind of switch springs back when let go? (a) a push button (b) a toggle switch (c) a reed switch (d) a tilt switch
33. 33.🔌 Which metal is used for most electric wires at home? (a) copper (b) rubber (c) glass (d) plastic
34. 34.🔘 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 ON, C is OFF and D is ON. Does the bulb glow? (a) No (b) Yes
35. 35.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
36. 36.Which of these is safe? (a) touch a switch when wet (b) use mains for a project (c) stop if a part gets hot (d) use a cable with cuts
37. 37.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) a wire is cut (d) the switch is ON
38. 38.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the steel shaft (c) the metal tip (d) the plastic handle
39. 39.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is ON. Does the bulb glow? (a) Yes (b) No
40. 40.🔋 Does a water pump give electricity or use electricity? (a) gives electricity (b) uses electricity

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