Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 71 · 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.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
2. 2.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
3. 3.🔘 When a switch is ON, the circuit is … (a) cut (b) broken (c) closed (d) open
4. 4.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
5. 5.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) motor (b) bulb (c) switch (d) cell
6. 6.🔍 Which is the odd one out? (a) climb an electric pole (b) poke things in a socket (c) stay away from pylons (d) use mains for a project
7. 7.🔘 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 ON, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
8. 8.Which of these is a conductor? (a) a glass marble (b) a wooden stick (c) a woollen thread (d) aluminium foil
9. 9.⚠️ Is it safe to open a phone charger? (a) not safe (b) safe
10. 10.🔘 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 OFF and C is ON. Does the bulb glow? (a) No (b) Yes
11. 11.Which of these means the circuit is closed? (a) the switch is OFF (b) a cell is taken out (c) all wires are joined (d) a wire is cut
12. 12.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
13. 13.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
14. 14.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
15. 15.True or false: if a wire is cut, the circuit is closed and current flows. (a) True (b) False
16. 16.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the shorter line (c) the longer line (d) both lines
17. 17.🔋 6 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
18. 18.Which of these gives us electricity? (a) a washing machine (b) a generator (c) a refrigerator (d) a computer
19. 19.🔦 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
20. 20.What does a toggle switch do? (a) works only while pressed (b) stays where you flip it (c) slides side to side (d) springs back when let go
21. 21.🔘 Which kind of switch springs back when let go? (a) a tilt switch (b) a slide switch (c) a toggle switch (d) a push button
22. 22.What does a slide switch do? (a) slides side to side (b) stays where you flip it (c) springs back when let go (d) closes when tipped over
23. 23.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
24. 24.🔦 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
25. 25.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
26. 26.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
27. 27.🔍 Which is the odd one out? (a) climb an electric pole (b) build with an adult near (c) use small battery cells (d) dry your hands first
28. 28.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) Yes (b) No
29. 29.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) to save copper only (d) each gets full voltage
30. 30.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
31. 31.💡 4 identical bulbs are joined in parallel (each on its own side-by-side path) 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 is not safe? (a) keep drinks far away (b) fly kites in open fields (c) fly a kite near wires (d) use small battery cells
33. 33.What does a tilt switch do? (a) slides side to side (b) stays where you flip it (c) closes when tipped over (d) closes near a magnet
34. 34.🔘 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) No (b) Yes
35. 35.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 9 V (c) 12 V (d) 230 V
36. 36.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
37. 37.True or false: a long and a short line is the symbol for a cell. (a) True (b) False
38. 38.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) wire (b) battery (c) diode (d) junction
39. 39.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
40. 40.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) No (b) Yes

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