Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 874 · 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.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) motor (b) bulb (c) cell (d) capacitor
2. 2.🔍 Which is the odd one out? (a) an electric iron (b) a school bell (c) a siren (d) a loudspeaker
3. 3.🔍 Which is the odd one out? (a) a steel spoon (b) a steel coin (c) a rubber eraser (d) an iron nail
4. 4.🔘 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 OFF, C is OFF and D is ON. Does the bulb glow? (a) Yes (b) No
5. 5.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a graphite rod. Does the bulb glow? (a) Yes (b) No
6. 6.Which of these is not safe? (a) use small battery cells (b) stop if a part gets hot (c) build with an adult near (d) climb an electric pole
7. 7.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
8. 8.Which of these is a conductor? (a) a cotton thread (b) a graphite rod (c) a woollen thread (d) a glass marble
9. 9.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 3 glow? (a) Yes (b) No
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 ON and C is OFF. Does the bulb glow? (a) No (b) Yes
11. 11.Which of these gives us electricity? (a) a washing machine (b) a computer (c) a water pump (d) a wind turbine
12. 12.🔋 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)? =
13. 13.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) so all go off together (d) each gets full voltage
14. 14.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) the shorter line (c) neither line (d) both lines
15. 15.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
16. 16.True or false: an LED lamp mainly gives out light. (a) False (b) True
17. 17.🔌 Most metals are good … (a) insulators (b) magnets only (c) conductors (d) batteries
18. 18.🔘 A bulb and a cell are joined through 2 switches on 2 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
19. 19.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
20. 20.Which of these mainly makes sound? (a) an electric drill (b) a ceiling fan (c) an electric toy car (d) a doorbell
21. 21.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) water drops (c) photons (d) electrons
22. 22.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) Yes (b) No
23. 23.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
24. 24.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) only when both are ON (c) never (d) when either is ON
25. 25.🔍 Which is the odd one out? (a) dry your hands first (b) keep drinks far away (c) use small battery cells (d) touch a switch when wet
26. 26.Which of these is true of a parallel circuit? (a) a single current path (b) each gets the full volts (c) one bulb out, all go out (d) a break stops every bulb
27. 27.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they all go out (d) they explode
28. 28.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
29. 29.True or false: to build with an adult near is not safe. (a) False (b) True
30. 30.💡 4 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
31. 31.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 5 of the switches are OFF and the rest are ON. How many bulbs glow?
32. 32.Which of these is not safe? (a) take cells out after use (b) use mains for a project (c) stay away from pylons (d) build with an adult near
33. 33.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
34. 34.True or false: a circle with a cross is the symbol for a switch. (a) False (b) True
35. 35.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
36. 36.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
37. 37.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
38. 38.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
39. 39.Which of these is a conductor? (a) a plastic straw (b) a glass marble (c) a rubber eraser (d) a steel spoon
40. 40.🔘 Which kind of switch springs back when let go? (a) a toggle switch (b) a slide switch (c) a push button (d) a tilt switch

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