Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 218 · 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 of these is a conductor? (a) a plastic straw (b) a dry cork (c) a metal paper clip (d) a woollen thread
2. 2.🔍 Which is the odd one out? (a) a loudspeaker (b) a doorbell (c) a siren (d) a torch
3. 3.True or false: one tall, one short bar is the symbol for a cell. (a) True (b) False
4. 4.Which of these mainly gives out heat? (a) an electric drill (b) an electric iron (c) a mixer grinder (d) a night lamp
5. 5.Which of these mainly makes movement? (a) a doorbell (b) a mixer grinder (c) an LED lamp (d) a torch
6. 6.🔦 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 safety pin. Does the bulb glow? (a) Yes (b) No
7. 7.⚡ What does a room heater mainly change electricity into? (a) light (b) sound (c) movement (d) heat
8. 8.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) one (d) two
9. 9.True or false: to touch a fallen wire is not safe. (a) True (b) False
10. 10.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) bulbs share the voltage (d) own switch for each bulb
11. 11.🔍 Which is the odd one out? (a) a night lamp (b) a room heater (c) an electric iron (d) a toaster
12. 12.True or false: a mixer grinder mainly makes movement. (a) False (b) True
13. 13.Which of these mainly gives out heat? (a) a water heater (b) a table fan (c) a buzzer (d) an electric toy car
14. 14.🔘 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 OFF, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
15. 15.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
16. 16.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) an open circuit (c) a series circuit (d) a full circuit
17. 17.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) an open circuit (c) a safe circuit (d) a short circuit
18. 18.🔋 5 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
19. 19.True or false: to use mains for a project is not safe. (a) False (b) True
20. 20.Which of these is safe? (a) climb an electric pole (b) use a cable with cuts (c) dry your hands first (d) throw cells in a fire
21. 21.🔋 A 12 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
22. 22.True or false: a street light mainly gives out light. (a) True (b) False
23. 23.True or false: a tilt switch closes when tipped over. (a) True (b) False
24. 24.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is ON. Does the bulb glow? (a) Yes (b) No
25. 25.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
26. 26.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) capacitor (b) battery (c) junction (d) LED
27. 27.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) electric current (c) sound (d) friction
28. 28.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
29. 29.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
30. 30.🔋 8 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
31. 31.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
32. 32.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
33. 33.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?
34. 34.🔘 Which kind of switch flips up or down? (a) a reed switch (b) a tilt switch (c) a toggle switch (d) a slide switch
35. 35.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
36. 36.Which of these mainly gives out light? (a) a water heater (b) an electric drill (c) an exhaust fan (d) a torch
37. 37.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) dust particles (c) photons (d) water drops
38. 38.Which of these mainly gives out heat? (a) an exhaust fan (b) a school bell (c) an electric drill (d) a toaster
39. 39.True or false: to use a cable with cuts is not safe. (a) False (b) True
40. 40.🔘 A bulb and a cell are joined through 5 switches on 5 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?

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