Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 50 · 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 joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
2. 2.🔌 Which metal is used for most electric wires at home? (a) glass (b) plastic (c) rubber (d) copper
3. 3.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
4. 4.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to save copper only (d) to make bulbs dim
5. 5.Which of these means the circuit is closed? (a) a cell is taken out (b) the switch is ON (c) the switch is OFF (d) the bulb is unscrewed
6. 6.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) the shorter line (c) neither line (d) both lines
7. 7.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) own switch for each bulb (d) a single current path
8. 8.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
9. 9.🔘 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
10. 10.💡 In a series circuit, how many paths does the current have? (a) none (b) two (c) one for each bulb (d) one
11. 11.🔋 4 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
12. 12.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
13. 13.Which of these uses electricity? (a) a wind turbine (b) a water pump (c) a bicycle dynamo (d) a cell
14. 14.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
15. 15.True or false: a woollen thread is an insulator. (a) False (b) True
16. 16.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
17. 17.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) Yes (b) No
18. 18.Which of these means the circuit is open? (a) a wire has come loose (b) all wires are joined (c) the loop is complete (d) the switch is ON
19. 19.True or false: “a single current path” is true of a series circuit. (a) False (b) True
20. 20.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
21. 21.🔍 Which is the odd one out? (a) use small battery cells (b) poke things in a socket (c) build with an adult near (d) stay away from pylons
22. 22.Which of these mainly gives out light? (a) a table fan (b) a buzzer (c) a mixer grinder (d) a tube light
23. 23.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
24. 24.💡 2 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
25. 25.🔍 Which is the odd one out? (a) a cotton thread (b) a paper strip (c) a rubber band (d) a safety pin
26. 26.✏️ In a circuit diagram, which part is drawn as a straight line? (a) battery (b) cell (c) wire (d) capacitor
27. 27.🔘 Which kind of switch springs back when let go? (a) a toggle switch (b) a slide switch (c) a tilt switch (d) a push button
28. 28.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
29. 29.True or false: a toggle switch flips up or down. (a) True (b) False
30. 30.Which of these is not safe? (a) climb an electric pole (b) take cells out after use (c) keep drinks far away (d) use small battery cells
31. 31.Which drawing is the symbol for a bulb? (a) a circle with V inside (b) two or more cell symbols (c) a circle with a cross (d) a long and a short line
32. 32.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
33. 33.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a push button (c) a toggle switch (d) a slide switch
34. 34.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
35. 35.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
36. 36.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
37. 37.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in series (c) in parallel (d) not joined
38. 38.⚡ What does a torch mainly change electricity into? (a) movement (b) heat (c) light (d) sound
39. 39.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) water drops (c) photons (d) electrons
40. 40.True or false: a room heater mainly gives out heat. (a) False (b) True

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