Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 863 · 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 means the circuit is closed? (a) the bulb is unscrewed (b) a wire is cut (c) a wire has come loose (d) all wires are joined
2. 2.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
3. 3.⚡ What does a loudspeaker mainly change electricity into? (a) light (b) movement (c) sound (d) heat
4. 4.🔍 Which is the odd one out? (a) a woollen thread (b) a rubber eraser (c) a glass marble (d) a copper wire
5. 5.🔦 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 an iron nail. Does the bulb glow? (a) Yes (b) No
6. 6.True or false: one tall, one short bar is the symbol for a wire. (a) False (b) True
7. 7.Which drawing is the symbol for an ammeter? (a) triangle, bar and arrows (b) a circle with an X in it (c) two equal parallel lines (d) a circle with A inside
8. 8.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
9. 9.🔘 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) No (b) Yes
10. 10.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
11. 11.🔦 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 steel spoon. Does the bulb glow? (a) Yes (b) No
12. 12.🔍 Which is the odd one out? (a) a wooden stick (b) a graphite rod (c) a rubber band (d) a rubber eraser
13. 13.True or false: a reed switch flips up or down. (a) True (b) False
14. 14.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
15. 15.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) straight lines (d) wavy lines
16. 16.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
17. 17.💡 3 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 3 is taken out of its holder. How many bulbs glow?
18. 18.Which of these uses electricity? (a) a bicycle dynamo (b) a generator (c) a battery (d) a refrigerator
19. 19.⚡ What does a street light mainly change electricity into? (a) light (b) heat (c) movement (d) sound
20. 20.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
21. 21.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the shorter line (c) neither line (d) the longer line
22. 22.🔋 What is a battery? (a) one single wire (b) a switch with a lid (c) a kind of bulb (d) two or more cells joined
23. 23.🔋 3 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
24. 24.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
25. 25.Which of these is an insulator? (a) an iron nail (b) a steel spoon (c) a copper wire (d) a rubber band
26. 26.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) Yes (b) No
27. 27.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) none (d) one
28. 28.🔘 Which kind of switch flips up or down? (a) a slide switch (b) a push button (c) a toggle switch (d) a reed switch
29. 29.Which of these is not safe? (a) stay away from pylons (b) take cells out after use (c) poke things in a socket (d) use small battery cells
30. 30.💡 3 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?
31. 31.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
32. 32.🔘 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) No (b) Yes
33. 33.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
34. 34.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) to make bulbs dim (d) each gets full voltage
35. 35.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
36. 36.What does a tilt switch do? (a) flips up or down (b) slides side to side (c) closes when tipped over (d) springs back when let go
37. 37.What does a slide switch do? (a) closes near a magnet (b) flips up or down (c) stays where you flip it (d) slides side to side
38. 38.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) Yes (b) No
39. 39.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a smaller voltage (c) a bigger voltage (d) the same voltage
40. 40.True or false: a line lifted at a gap is the symbol for a capacitor. (a) True (b) False

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