Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 451 · 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 kind of switch closes near a magnet? (a) a reed switch (b) a toggle switch (c) a slide switch (d) a tilt switch
2. 2.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
3. 3.🔦 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) No (b) Yes
4. 4.True or false: a rice cooker mainly makes movement. (a) False (b) True
5. 5.Which of these is not safe? (a) keep drinks far away (b) fly kites in open fields (c) touch a fallen wire (d) build with an adult near
6. 6.⚠️ Is it safe to touch a switch when wet? (a) safe (b) not safe
7. 7.True or false: to poke things in a socket is not safe. (a) True (b) False
8. 8.Which of these means the circuit is open? (a) a wire is cut (b) the switch is ON (c) the loop is complete (d) all wires are joined
9. 9.🔍 Which is the odd one out? (a) stop if a part gets hot (b) keep drinks far away (c) climb an electric pole (d) fly kites in open fields
10. 10.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) each gets the full volts (d) one bulb out, all go out
11. 11.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) LED (b) motor (c) ammeter (d) diode
12. 12.What does a push button do? (a) closes near a magnet (b) closes when tipped over (c) slides side to side (d) works only while pressed
13. 13.🔍 Which is the odd one out? (a) a water heater (b) an electric kettle (c) a toaster (d) a ceiling fan
14. 14.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) so all go off together (d) to save copper only
15. 15.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
16. 16.🔘 Which kind of switch slides side to side? (a) a toggle switch (b) a push button (c) a slide switch (d) a reed switch
17. 17.Which of these is true of a parallel circuit? (a) many paths for current (b) one bulb out, all go out (c) a break stops every bulb (d) bulbs share the voltage
18. 18.Which drawing is the symbol for a battery? (a) a plain rectangle (b) two or more cell symbols (c) a circle with a cross (d) one tall, one short bar
19. 19.What does a slide switch do? (a) slides side to side (b) works only while pressed (c) closes when tipped over (d) springs back when let go
20. 20.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) never (c) when both are OFF (d) when both are ON
21. 21.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
22. 22.Which of these is safe? (a) use mains for a project (b) use a cable with cuts (c) dry your hands first (d) touch a switch when wet
23. 23.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
24. 24.Which drawing is the symbol for a wire? (a) two equal parallel lines (b) a straight line (c) a dot where wires meet (d) a plain rectangle
25. 25.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) electrical energy (c) nuclear energy (d) wind energy
26. 26.Which of these is an insulator? (a) aluminium foil (b) a metal paper clip (c) a rubber eraser (d) a safety pin
27. 27.🔦 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
28. 28.Which drawing is the symbol for a voltmeter? (a) a plain rectangle (b) a dot where wires meet (c) two equal parallel lines (d) a circle with V inside
29. 29.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) motor (b) capacitor (c) battery (d) cell
30. 30.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is ON. Does the bulb glow? (a) No (b) Yes
31. 31.🔦 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 aluminium foil. Does the bulb glow? (a) Yes (b) No
32. 32.True or false: an LED lamp mainly gives out light. (a) False (b) True
33. 33.True or false: a reed switch closes near a magnet. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) a table fan (b) a buzzer (c) a doorbell (d) a school bell
35. 35.🔍 Which is the odd one out? (a) a plastic straw (b) a steel spoon (c) an iron nail (d) aluminium foil
36. 36.Which drawing is the symbol for an LED? (a) a circle with an X in it (b) a circle with V inside (c) triangle, bar and arrows (d) a circle with A inside
37. 37.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
38. 38.Which of these means the circuit is closed? (a) the switch is OFF (b) the bulb is unscrewed (c) a cell is taken out (d) the loop is complete
39. 39.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
40. 40.🔍 Which is the odd one out? (a) an iron nail (b) a graphite rod (c) a ceramic cup (d) a steel coin

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