Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 418 · 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.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
2. 2.🔌 Which metal is used for most electric wires at home? (a) rubber (b) plastic (c) copper (d) glass
3. 3.True or false: a copper wire is a conductor. (a) False (b) True
4. 4.💡 In a series circuit, how many paths does the current have? (a) none (b) two (c) one (d) one for each bulb
5. 5.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic makes current (c) plastic is an insulator (d) plastic is a conductor
6. 6.True or false: to poke things in a socket is not safe. (a) False (b) True
7. 7.🔦 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
8. 8.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
9. 9.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
10. 10.🔦 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) No (b) Yes
11. 11.Which of these means the circuit is closed? (a) the switch is OFF (b) a wire has come loose (c) the loop is complete (d) a wire is cut
12. 12.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in series (c) not joined (d) in parallel
13. 13.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
14. 14.🔘 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?
15. 15.🔌 Is a brass key a conductor or an insulator? (a) a conductor (b) an insulator
16. 16.Which drawing is the symbol for a voltmeter? (a) a long and a short line (b) a straight line (c) a circle with V inside (d) triangle against a bar
17. 17.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
18. 18.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
19. 19.🔋 A 6 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
20. 20.🔋 Does a wind turbine give electricity or use electricity? (a) uses electricity (b) gives electricity
21. 21.⚡ What does a street light mainly change electricity into? (a) light (b) heat (c) movement (d) sound
22. 22.💡 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. Does bulb 1 glow? (a) No (b) Yes
23. 23.Which drawing is the symbol for a switch? (a) a dot where wires meet (b) triangle, bar and arrows (c) a plain rectangle (d) a line lifted at a gap
24. 24.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing
25. 25.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
26. 26.True or false: two or more cell symbols is the symbol for a bulb. (a) True (b) False
27. 27.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) each gets full voltage (d) so all go off together
28. 28.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) capacitor (b) wire (c) motor (d) switch
29. 29.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) one bulb out, all go out (d) many paths for current
30. 30.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
31. 31.Which of these mainly gives out heat? (a) a siren (b) a ceiling fan (c) a water heater (d) a torch
32. 32.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
33. 33.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
34. 34.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
35. 35.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
36. 36.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 1.5 V (c) 15 V (d) 0.5 V
37. 37.Which of these means the circuit is closed? (a) a wire has come loose (b) a cell is taken out (c) the switch is OFF (d) the switch is ON
38. 38.True or false: a traffic signal mainly gives out heat. (a) True (b) False
39. 39.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
40. 40.🔘 Which kind of switch slides side to side? (a) a reed switch (b) a tilt switch (c) a toggle switch (d) a slide switch

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