Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 251 · 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 a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
2. 2.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
3. 3.True or false: a glass marble is an insulator. (a) True (b) False
4. 4.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water makes it cold (c) water carries current (d) it spoils the paint
5. 5.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
6. 6.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) never (c) when both are OFF (d) when both are ON
7. 7.🔍 Which is the odd one out? (a) a steel spoon (b) a woollen thread (c) an iron nail (d) a safety pin
8. 8.🔘 Which kind of switch works only while pressed? (a) a push button (b) a toggle switch (c) a slide switch (d) a reed switch
9. 9.Which of these is a conductor? (a) a rubber eraser (b) a steel spoon (c) a woollen thread (d) a glass marble
10. 10.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a series circuit (c) an open circuit (d) a full circuit
11. 11.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) no voltage (c) the same voltage (d) half the voltage
12. 12.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
13. 13.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
14. 14.🔘 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 ON and C is OFF. Does the bulb glow? (a) Yes (b) No
15. 15.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
16. 16.🔘 Which kind of switch flips up or down? (a) a tilt switch (b) a slide switch (c) a push button (d) a toggle switch
17. 17.💡 In a series circuit, how many paths does the current have? (a) none (b) one (c) two (d) one for each bulb
18. 18.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
19. 19.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
20. 20.🔌 Which metal is used for most electric wires at home? (a) plastic (b) glass (c) copper (d) rubber
21. 21.🔍 Which is the odd one out? (a) a traffic signal (b) a night lamp (c) a buzzer (d) a torch
22. 22.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a push button (c) a tilt switch (d) a toggle switch
23. 23.Which drawing is the symbol for a diode? (a) a circle with a cross (b) triangle, bar and arrows (c) triangle against a bar (d) a circle with M inside
24. 24.True or false: a push button springs back when let go. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) a street light (b) a torch (c) a traffic signal (d) a loudspeaker
26. 26.Which of these is safe? (a) build with an adult near (b) touch a switch when wet (c) poke things in a socket (d) fly a kite near wires
27. 27.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) False (b) True
28. 28.🔘 Which kind of switch closes near a magnet? (a) a toggle switch (b) a slide switch (c) a reed switch (d) a push button
29. 29.🔋 4 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
30. 30.Which of these mainly makes sound? (a) a rice cooker (b) a loudspeaker (c) a street light (d) an exhaust fan
31. 31.🔦 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 aluminium foil. Does the bulb glow? (a) Yes (b) No
32. 32.🔦 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) Yes (b) No
33. 33.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) the loop is complete (d) the switch is OFF
34. 34.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) bulb (b) diode (c) switch (d) LED
35. 35.Which of these gives us electricity? (a) a refrigerator (b) a wind turbine (c) an air conditioner (d) a water pump
36. 36.🔋 How many 1.5 V cells must be joined in series to give 6 V?
37. 37.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
38. 38.Which of these is an insulator? (a) an iron nail (b) a wooden stick (c) a safety pin (d) a graphite rod
39. 39.🔘 When a switch is ON, the circuit is … (a) broken (b) closed (c) open (d) cut
40. 40.Which of these is safe? (a) touch a fallen wire (b) climb an electric pole (c) fly a kite near wires (d) take cells out after use

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