Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 135 · 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 drawing is the symbol for a switch? (a) a plain rectangle (b) a line lifted at a gap (c) two equal parallel lines (d) a circle with M inside
2. 2.🔋 Does a bicycle dynamo give electricity or use electricity? (a) gives electricity (b) uses electricity
3. 3.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
4. 4.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) Yes (b) No
5. 5.🔘 Which kind of switch closes near a magnet? (a) a tilt switch (b) a toggle switch (c) a slide switch (d) a reed switch
6. 6.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) one bulb out, all go out (c) a break stops every bulb (d) a single current path
7. 7.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) one for each bulb (d) none
8. 8.💡 4 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?
9. 9.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
10. 10.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
11. 11.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
12. 12.🔘 A bulb and a cell are joined through 6 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
13. 13.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic makes current (c) plastic is a conductor (d) plastic is an insulator
14. 14.🔋 A 6 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
15. 15.🔍 Which is the odd one out? (a) a traffic signal (b) an LED lamp (c) a street light (d) a doorbell
16. 16.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) both of them (b) only one (c) none (d) it does not matter
17. 17.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) when either is ON (c) only when both are OFF (d) only when both are ON
18. 18.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
19. 19.True or false: a graphite rod is an insulator. (a) True (b) False
20. 20.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
21. 21.💡 6 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
22. 22.🔦 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
23. 23.Which of these mainly makes sound? (a) a table fan (b) a siren (c) an electric toy car (d) an electric iron
24. 24.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
25. 25.🔋 What should you do with used-up cells? (a) cut them open (b) throw them in a fire (c) give them for recycling (d) bury them in soil
26. 26.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
27. 27.Which of these is an insulator? (a) a steel coin (b) a plastic ruler (c) a metal paper clip (d) aluminium foil
28. 28.Which of these is true of a series circuit? (a) many paths for current (b) one bulb out, all go out (c) one out, the rest glow (d) each gets the full volts
29. 29.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) one bulb out, all go out (d) many paths for current
30. 30.🔍 Which is the odd one out? (a) stop if a part gets hot (b) build with an adult near (c) keep drinks far away (d) fly a kite near wires
31. 31.Which of these is a conductor? (a) a rubber eraser (b) a brass key (c) a cotton thread (d) a glass marble
32. 32.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) sound energy (c) movement energy (d) light energy
33. 33.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
34. 34.🔋 Does a television give electricity or use electricity? (a) gives electricity (b) uses electricity
35. 35.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) to save copper only (d) each gets full voltage
36. 36.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
37. 37.🔋 6 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
38. 38.✏️ In a circuit diagram, which part is drawn as a straight line? (a) switch (b) cell (c) ammeter (d) wire
39. 39.Which of these is true of a series circuit? (a) bulbs share the voltage (b) used in house wiring (c) many paths for current (d) one out, the rest glow
40. 40.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. How many bulbs glow?

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