Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 788 · 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.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
2. 2.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
3. 3.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
4. 4.Which of these mainly gives out heat? (a) a night lamp (b) a toaster (c) a school bell (d) a doorbell
5. 5.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
6. 6.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) to make them heavy (c) plastic is an insulator (d) plastic is a conductor
7. 7.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
8. 8.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
9. 9.🔋 3 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
10. 10.🔋 How many 1.5 V cells must be joined in series to give 9 V?
11. 11.True or false: a water heater mainly gives out light. (a) True (b) False
12. 12.Which of these uses electricity? (a) an air conditioner (b) a battery (c) a wind turbine (d) a generator
13. 13.💡 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. Bulbs 1 and 4 are taken out of their holders. How many bulbs glow?
14. 14.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the switch (c) the glass (d) the filament
15. 15.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pour water on them (b) shout for an adult (c) wait and watch (d) pull them by the hand
16. 16.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
17. 17.✏️ In a circuit diagram, which part is drawn as a straight line? (a) capacitor (b) wire (c) cell (d) bulb
18. 18.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
19. 19.True or false: a loudspeaker mainly makes sound. (a) False (b) True
20. 20.Which drawing is the symbol for a battery? (a) a small empty box (b) a circle with a cross (c) many long-short pairs (d) a dot where wires meet
21. 21.Which of these is true of a series circuit? (a) many paths for current (b) own switch for each bulb (c) used in house wiring (d) one bulb out, all go out
22. 22.True or false: to fly a kite near wires is not safe. (a) True (b) False
23. 23.🔋 Does a battery give electricity or use electricity? (a) uses electricity (b) gives electricity
24. 24.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) two (d) one
25. 25.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) when both are OFF (c) when both are ON (d) never
26. 26.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) never (c) when either is ON (d) only when both are OFF
27. 27.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a copper wire across the gap. Does the bulb glow? (a) No (b) Yes
28. 28.True or false: a circle with a cross is the symbol for a bulb. (a) True (b) False
29. 29.🔋 A 3 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
30. 30.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a dry cork. Does the bulb glow? (a) Yes (b) No
31. 31.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) by Wi-Fi (d) in series
32. 32.Which of these gives us electricity? (a) a power station (b) a computer (c) an air conditioner (d) a washing machine
33. 33.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
34. 34.💡 3 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
35. 35.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is ON, B is ON, C is OFF and D is OFF. Does the bulb glow? (a) No (b) Yes
36. 36.Which drawing is the symbol for a bulb? (a) a circle with an X in it (b) a long and a short line (c) triangle, bar and arrows (d) many long-short pairs
37. 37.True or false: to open a phone charger is safe. (a) True (b) False
38. 38.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
39. 39.Which of these mainly gives out heat? (a) a water heater (b) a doorbell (c) an LED lamp (d) a torch
40. 40.Which of these mainly makes sound? (a) a tube light (b) a toaster (c) a buzzer (d) an LED lamp

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