Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 90 · 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.What does a slide switch do? (a) closes near a magnet (b) stays where you flip it (c) works only while pressed (d) slides side to side
2. 2.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
3. 3.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
4. 4.Which of these gives us electricity? (a) a television (b) a computer (c) an air conditioner (d) a bicycle dynamo
5. 5.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
6. 6.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
7. 7.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) to make them heavy (c) plastic is an insulator (d) plastic is a conductor
8. 8.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a parallel circuit (c) a short circuit (d) a safe circuit
9. 9.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) only when both are OFF (c) when either is ON (d) only when both are ON
10. 10.Which drawing is the symbol for a diode? (a) a circle with A inside (b) a circle with an X in it (c) a line lifted at a gap (d) triangle against a bar
11. 11.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) capacitor (b) battery (c) cell (d) ammeter
12. 12.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in series (d) in parallel
13. 13.🔍 Which is the odd one out? (a) a toaster (b) a night lamp (c) a water heater (d) a rice cooker
14. 14.Which of these is an insulator? (a) a dry cork (b) a safety pin (c) a copper wire (d) a steel spoon
15. 15.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
16. 16.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
17. 17.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a ceramic cup. Does the bulb glow? (a) No (b) Yes
18. 18.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
19. 19.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
20. 20.🔋 How many 3 V cells must be joined in series to give 15 V?
21. 21.Which of these gives us electricity? (a) a mobile phone (b) a refrigerator (c) a battery (d) a washing machine
22. 22.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) each gets full voltage (d) to save copper only
23. 23.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
24. 24.True or false: a tilt switch closes when tipped over. (a) False (b) True
25. 25.🔌 Which part of a screwdriver should an electrician hold? (a) the steel shaft (b) the bare end (c) the plastic handle (d) the metal tip
26. 26.What does a push button do? (a) closes near a magnet (b) works only while pressed (c) closes when tipped over (d) flips up or down
27. 27.Which of these is safe? (a) throw cells in a fire (b) stay away from pylons (c) use a cable with cuts (d) climb an electric pole
28. 28.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
29. 29.Which of these mainly makes movement? (a) a room heater (b) an exhaust fan (c) a buzzer (d) a street light
30. 30.True or false: a steel coin is an insulator. (a) False (b) True
31. 31.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
32. 32.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 15 V (c) 1.5 V (d) 230 V
33. 33.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
34. 34.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a small battery pack (c) a mains extension board (d) a wall socket
35. 35.⚡ What does a school bell mainly change electricity into? (a) heat (b) movement (c) light (d) sound
36. 36.🔌 Is a graphite rod a conductor or an insulator? (a) a conductor (b) an insulator
37. 37.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
38. 38.🔋 6 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
39. 39.🔘 When a switch is ON, the circuit is … (a) open (b) broken (c) cut (d) closed
40. 40.⚠️ Is it safe to stop if a part gets hot? (a) not safe (b) safe

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