Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 962 · 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.💡 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
2. 2.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
3. 3.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) used in house wiring (d) a break stops every bulb
4. 4.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
5. 5.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) battery (b) bulb (c) resistor (d) LED
6. 6.Which of these mainly makes sound? (a) a tube light (b) a siren (c) a street light (d) an exhaust fan
7. 7.🔋 Does a refrigerator give electricity or use electricity? (a) uses electricity (b) gives electricity
8. 8.🔦 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 safety pin. Does the bulb glow? (a) Yes (b) No
9. 9.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
10. 10.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) LED (b) resistor (c) bulb (d) junction
11. 11.⚡ A solar panel changes which kind of energy into electricity? (a) sound energy (b) wind energy (c) light energy (d) chemical energy
12. 12.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) bulb (b) capacitor (c) resistor (d) battery
13. 13.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
14. 14.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
15. 15.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) cell (b) motor (c) diode (d) bulb
16. 16.Which of these means the circuit is open? (a) a cell is taken out (b) the switch is ON (c) the loop is complete (d) all wires are joined
17. 17.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) both of them (b) it does not matter (c) only one (d) none
18. 18.True or false: a plastic ruler is an insulator. (a) False (b) True
19. 19.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) to save copper only (d) each gets full voltage
20. 20.Which drawing is the symbol for a voltmeter? (a) a straight line (b) triangle, bar and arrows (c) a dot where wires meet (d) a circle with V inside
21. 21.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) Yes (b) No
22. 22.🔦 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) Yes (b) No
23. 23.🔁 What must there be for a current to flow? (a) one loose end (b) a complete loop (c) a plastic gap (d) a broken path
24. 24.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) cell (b) battery (c) resistor (d) motor
25. 25.What does a tilt switch do? (a) springs back when let go (b) slides side to side (c) closes near a magnet (d) closes when tipped over
26. 26.What does a toggle switch do? (a) slides side to side (b) closes near a magnet (c) springs back when let go (d) stays where you flip it
27. 27.Which drawing is the symbol for a bulb? (a) a circle with a cross (b) many long-short pairs (c) a long and a short line (d) triangle, bar and arrows
28. 28.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
29. 29.True or false: a small empty box is the symbol for a resistor. (a) True (b) False
30. 30.🔘 When a switch is ON, the circuit is … (a) open (b) cut (c) broken (d) closed
31. 31.🔍 Which is the odd one out? (a) a plastic straw (b) a plastic ruler (c) a metal paper clip (d) a glass marble
32. 32.💡 In a series circuit, how many paths does the current have? (a) one (b) none (c) one for each bulb (d) two
33. 33.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
34. 34.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) no voltage (c) half the voltage (d) the same voltage
35. 35.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) quick and clear for all (c) to make it colourful (d) symbols are heavier
36. 36.🔘 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 OFF and C is ON. Does the bulb glow? (a) Yes (b) No
37. 37.🔋 How many 1.2 V cells must be joined in series to give 6 V?
38. 38.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
39. 39.True or false: if the switch is ON, the circuit is closed and current flows. (a) True (b) False
40. 40.True or false: a plastic straw is a conductor. (a) False (b) True

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