Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 193 · 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 gives us electricity? (a) a solar panel (b) an air conditioner (c) a computer (d) a water pump
2. 2.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
3. 3.🔍 Which is the odd one out? (a) use small battery cells (b) stay away from pylons (c) poke things in a socket (d) take cells out after use
4. 4.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
5. 5.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) the shorter line (d) neither line
6. 6.🔍 Which is the odd one out? (a) use small battery cells (b) take cells out after use (c) touch a switch when wet (d) dry your hands first
7. 7.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
8. 8.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a wall socket (c) a small battery pack (d) a mains extension board
9. 9.🔁 What must there be for a current to flow? (a) a complete loop (b) a broken path (c) one loose end (d) a plastic gap
10. 10.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 bulb is unscrewed
11. 11.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) No (b) Yes
12. 12.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) used in house wiring (c) a single current path (d) a break stops every bulb
13. 13.🔘 When a switch is ON, the circuit is … (a) cut (b) open (c) broken (d) closed
14. 14.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the switch (c) the base (d) the filament
15. 15.🔘 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 ON, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
16. 16.🔋 6 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)? =
17. 17.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
18. 18.Which drawing is the symbol for a switch? (a) a circle with an X in it (b) a long and a short line (c) a line lifted at a gap (d) a dot where wires meet
19. 19.True or false: a push button slides side to side. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) a water heater (b) a ceiling fan (c) an electric iron (d) a rice cooker
21. 21.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. How many bulbs glow?
22. 22.🔋 A 3 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
23. 23.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
24. 24.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
25. 25.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
26. 26.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
27. 27.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) resistor (b) LED (c) motor (d) switch
28. 28.True or false: many long-short pairs is the symbol for a switch. (a) True (b) False
29. 29.🔋 5 identical 1.2 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 ceiling fan (b) a room heater (c) a table fan (d) a buzzer
31. 31.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
32. 32.True or false: a safety pin is an insulator. (a) False (b) True
33. 33.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
34. 34.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
35. 35.🔘 Which kind of switch flips up or down? (a) a push button (b) a reed switch (c) a slide switch (d) a toggle switch
36. 36.⚡ A fan changes electrical energy mainly into which kind of energy? (a) movement energy (b) sound energy (c) chemical energy (d) light energy
37. 37.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
38. 38.🔍 Which is the odd one out? (a) stay away from pylons (b) dry your hands first (c) fly kites in open fields (d) use mains for a project
39. 39.🔌 Is a plastic ruler a conductor or an insulator? (a) a conductor (b) an insulator
40. 40.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to make it colourful (c) quick and clear for all (d) to hide the circuit

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