Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 182 · 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.True or false: a dot where wires meet is the symbol for a resistor. (a) True (b) False
2. 2.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 4 of the switches are OFF and the rest are ON. How many bulbs glow?
3. 3.Which of these gives us electricity? (a) a television (b) a bicycle dynamo (c) a computer (d) an air conditioner
4. 4.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the steel shaft (c) the metal tip (d) the bare end
5. 5.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
6. 6.Which of these is safe? (a) poke things in a socket (b) use a cable with cuts (c) use mains for a project (d) stay away from pylons
7. 7.Which of these mainly gives out heat? (a) a siren (b) a room heater (c) a mixer grinder (d) an LED lamp
8. 8.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
9. 9.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) plastic makes current (c) to make them heavy (d) plastic is a conductor
10. 10.Which of these is true of a series circuit? (a) bulbs share the voltage (b) used in house wiring (c) one out, the rest glow (d) each gets the full volts
11. 11.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
12. 12.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 1.5 V (c) 9 V (d) 12 V
13. 13.🔍 Which is the odd one out? (a) use mains for a project (b) stay away from pylons (c) throw cells in a fire (d) touch a switch when wet
14. 14.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) Yes (b) No
15. 15.🔍 Which is the odd one out? (a) a room heater (b) an electric kettle (c) a rice cooker (d) a street light
16. 16.Which of these gives us electricity? (a) a refrigerator (b) a solar panel (c) a television (d) a computer
17. 17.🔋 8 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
18. 18.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
19. 19.💡 A battery lights 3 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
20. 20.True or false: if the loop is complete, the circuit is closed and current flows. (a) True (b) False
21. 21.True or false: two or more cell symbols is the symbol for a cell. (a) False (b) True
22. 22.🔘 Which kind of switch slides side to side? (a) a toggle switch (b) a reed switch (c) a tilt switch (d) a slide switch
23. 23.True or false: to use mains for a project is safe. (a) False (b) True
24. 24.True or false: a circle with V inside is the symbol for a voltmeter. (a) True (b) False
25. 25.💡 In a series circuit, how many paths does the current have? (a) two (b) none (c) one for each bulb (d) one
26. 26.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) little stars (c) wavy lines (d) dotted circles
27. 27.Which drawing is the symbol for a wire? (a) a long and a short line (b) triangle, bar and arrows (c) a small empty box (d) a straight line
28. 28.🔦 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 brass key. Does the bulb glow? (a) No (b) Yes
29. 29.Which of these is not safe? (a) dry your hands first (b) throw cells in a fire (c) stop if a part gets hot (d) stay away from pylons
30. 30.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
31. 31.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a reed switch (c) a push button (d) a tilt switch
32. 32.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
33. 33.🔦 A circuit has a used-up (dead) 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 rubber band. Does the bulb glow? (a) Yes (b) No
34. 34.Which of these is not safe? (a) stop if a part gets hot (b) use a cable with cuts (c) stay away from pylons (d) fly kites in open fields
35. 35.True or false: a circle with a cross is the symbol for a wire. (a) True (b) False
36. 36.True or false: to take cells out after use is safe. (a) True (b) False
37. 37.Which of these gives us electricity? (a) a water pump (b) a washing machine (c) a refrigerator (d) a power station
38. 38.🔍 Which is the odd one out? (a) fly kites in open fields (b) stay away from pylons (c) use mains for a project (d) take cells out after use
39. 39.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
40. 40.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)

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