Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 108 · 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.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
2. 2.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
3. 3.🔍 Which is the odd one out? (a) a copper wire (b) a dry cork (c) a metal paper clip (d) aluminium foil
4. 4.💡 2 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 2 are taken out of their holders. How many bulbs glow?
5. 5.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) the loop is complete (c) a cell is taken out (d) a wire is cut
6. 6.Which of these means the circuit is closed? (a) the switch is OFF (b) the switch is ON (c) the bulb is unscrewed (d) a wire has come loose
7. 7.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
8. 8.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
9. 9.Which of these uses electricity? (a) a cell (b) a wind turbine (c) a generator (d) an air conditioner
10. 10.True or false: to touch a switch when wet is safe. (a) False (b) True
11. 11.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
12. 12.True or false: a rubber band is an insulator. (a) False (b) True
13. 13.True or false: a torch mainly gives out light. (a) False (b) True
14. 14.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
15. 15.🔍 Which is the odd one out? (a) climb an electric pole (b) stay away from pylons (c) use mains for a project (d) use a cable with cuts
16. 16.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
17. 17.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a cotton thread. Does the bulb glow? (a) Yes (b) No
18. 18.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
19. 19.True or false: a straight line is the symbol for a wire. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) touch a fallen wire (b) stop if a part gets hot (c) touch a switch when wet (d) use mains for a project
21. 21.Which of these is safe? (a) touch a switch when wet (b) climb an electric pole (c) touch a fallen wire (d) use small battery cells
22. 22.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
23. 23.True or false: a graphite rod is a conductor. (a) False (b) True
24. 24.Which of these is an insulator? (a) a rubber band (b) a steel coin (c) a safety pin (d) aluminium foil
25. 25.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 0.5 V (c) 230 V (d) 1.5 V
26. 26.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
27. 27.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the switch (c) the filament (d) the glass
28. 28.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
29. 29.🔍 Which is the odd one out? (a) a torch (b) a school bell (c) a loudspeaker (d) a buzzer
30. 30.🔋 What is a battery? (a) a kind of bulb (b) one single wire (c) a switch with a lid (d) two or more cells joined
31. 31.Which of these means the circuit is closed? (a) a wire is cut (b) the bulb is unscrewed (c) all wires are joined (d) the switch is OFF
32. 32.⚡ What does a mixer grinder mainly change electricity into? (a) light (b) movement (c) sound (d) heat
33. 33.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
34. 34.Which drawing is the symbol for a cell? (a) a circle with M inside (b) a long and a short line (c) a dot where wires meet (d) two equal parallel lines
35. 35.🔋 Does a solar panel give electricity or use electricity? (a) gives electricity (b) uses electricity
36. 36.True or false: two or more cell symbols is the symbol for a battery. (a) False (b) True
37. 37.🔋 2 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
38. 38.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
39. 39.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
40. 40.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a slide switch (c) a toggle switch (d) a push button

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