Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 677 · 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 doorbell mainly gives out heat. (a) False (b) True
2. 2.🔘 What does a switch do in a circuit? (a) stores current (b) changes the voltage (c) makes electricity (d) opens or closes the loop
3. 3.Which of these uses electricity? (a) a wind turbine (b) an air conditioner (c) a battery (d) a generator
4. 4.What does a toggle switch do? (a) slides side to side (b) springs back when let go (c) closes near a magnet (d) flips up or down
5. 5.True or false: if the switch is OFF, the circuit is open and no current flows. (a) False (b) True
6. 6.True or false: a reed switch works only while pressed. (a) True (b) False
7. 7.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) it spoils the paint (c) water carries current (d) water makes it cold
8. 8.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a bulb (c) a plug top (d) a fuse or MCB
9. 9.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the longer line (c) both lines (d) the shorter line
10. 10.🔍 Which is the odd one out? (a) dry your hands first (b) keep drinks far away (c) use a cable with cuts (d) take cells out after use
11. 11.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) resistor (b) cell (c) switch (d) junction
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 a wire has come loose? (a) closed (b) open
14. 14.💡 3 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?
15. 15.True or false: if a wire is cut, the circuit is open and no current flows. (a) True (b) False
16. 16.What does a reed switch do? (a) works only while pressed (b) stays where you flip it (c) closes near a magnet (d) flips up or down
17. 17.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity
18. 18.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
19. 19.🔍 Which is the odd one out? (a) a torch (b) a street light (c) an electric toy car (d) a tube light
20. 20.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
21. 21.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
22. 22.True or false: a slide switch flips up or down. (a) False (b) True
23. 23.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
24. 24.Which of these gives us electricity? (a) a television (b) a computer (c) a water pump (d) a solar panel
25. 25.True or false: an LED lamp mainly gives out light. (a) True (b) False
26. 26.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) quick and clear for all (c) symbols are heavier (d) to hide the circuit
27. 27.🔋 Does a water pump give electricity or use electricity? (a) uses electricity (b) gives electricity
28. 28.True or false: to fly kites in open fields is not safe. (a) False (b) True
29. 29.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the glass (c) the switch (d) the filament
30. 30.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
31. 31.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) Yes (b) No
32. 32.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) an open circuit (c) a full circuit (d) a series circuit
33. 33.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) wind energy (c) nuclear energy (d) electrical energy
34. 34.True or false: a push button springs back when let go. (a) False (b) True
35. 35.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
36. 36.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) junction (b) bulb (c) switch (d) voltmeter
37. 37.🔦 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 plastic straw. Does the bulb glow? (a) Yes (b) No
38. 38.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they get dimmer (d) they all go out
39. 39.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
40. 40.True or false: to use a cable with cuts is safe. (a) True (b) False

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