Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 270 · 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.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
2. 2.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
3. 3.🔋 Does a bicycle dynamo give electricity or use electricity? (a) uses electricity (b) gives electricity
4. 4.Which of these is a conductor? (a) a plastic ruler (b) a glass marble (c) a metal paper clip (d) a ceramic cup
5. 5.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
6. 6.What does a toggle switch do? (a) works only while pressed (b) slides side to side (c) springs back when let go (d) stays where you flip it
7. 7.True or false: a street light mainly makes sound. (a) False (b) True
8. 8.Which of these is an insulator? (a) a safety pin (b) aluminium foil (c) a plastic ruler (d) a copper wire
9. 9.True or false: a toaster mainly gives out light. (a) True (b) False
10. 10.🔋 2 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
11. 11.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) one bulb out, all go out (d) each gets the full volts
12. 12.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
13. 13.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
14. 14.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) no voltage (c) the same voltage (d) double the voltage
15. 15.True or false: two or more cell symbols is the symbol for an ammeter. (a) True (b) False
16. 16.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) True (b) False
17. 17.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
18. 18.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
19. 19.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a mains extension board (c) a wall socket (d) a small battery pack
20. 20.🔋 7 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)? =
21. 21.True or false: triangle against a bar is the symbol for a switch. (a) True (b) False
22. 22.Which of these means the circuit is open? (a) the loop is complete (b) the switch is OFF (c) all wires are joined (d) the switch is ON
23. 23.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) neither line (d) the shorter line
24. 24.🔋 What is a battery? (a) a kind of bulb (b) two or more cells joined (c) one single wire (d) a switch with a lid
25. 25.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
26. 26.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) when either is ON (c) only when both are ON (d) never
27. 27.What does a toggle switch do? (a) closes near a magnet (b) slides side to side (c) flips up or down (d) works only while pressed
28. 28.💡 In a series circuit, how many paths does the current have? (a) one (b) one for each bulb (c) two (d) none
29. 29.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) ammeter (b) cell (c) wire (d) switch
30. 30.🔦 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 copper wire. Does the bulb glow? (a) No (b) Yes
31. 31.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) motor (b) capacitor (c) cell (d) resistor
32. 32.True or false: a room heater mainly makes sound. (a) True (b) False
33. 33.Which of these is a conductor? (a) a graphite rod (b) a plastic straw (c) a rubber band (d) a wooden stick
34. 34.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?
35. 35.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 15 V (c) 0.5 V (d) 230 V
36. 36.True or false: a safety pin is an insulator. (a) True (b) False
37. 37.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
38. 38.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the switch (c) the filament (d) the base
39. 39.🔘 A bulb and a cell are joined through 4 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
40. 40.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor

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