Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 318 · 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 means the circuit is open? (a) the loop is complete (b) a wire has come loose (c) the switch is ON (d) all wires are joined
2. 2.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) junction (b) battery (c) cell (d) diode
3. 3.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
4. 4.True or false: to stay away from pylons is not safe. (a) True (b) False
5. 5.True or false: a toggle switch flips up or down. (a) False (b) True
6. 6.What does a slide switch do? (a) flips up or down (b) works only while pressed (c) slides side to side (d) stays where you flip it
7. 7.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by an iron nail. Does the bulb glow? (a) Yes (b) No
8. 8.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) resistor (b) diode (c) bulb (d) voltmeter
9. 9.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) only when both are OFF (c) only when both are ON (d) when either is ON
10. 10.⚡ What does a room heater mainly change electricity into? (a) light (b) movement (c) sound (d) heat
11. 11.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) many paths for current (c) a break stops every bulb (d) bulbs share the voltage
12. 12.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
13. 13.True or false: a circle with M inside is the symbol for a motor. (a) False (b) True
14. 14.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
15. 15.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 1.5 V (c) 230 V (d) 9 V
16. 16.True or false: a push button springs back when let go. (a) False (b) True
17. 17.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a brass key. Does the bulb glow? (a) Yes (b) No
18. 18.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
19. 19.True or false: one tall, one short bar is the symbol for a cell. (a) False (b) True
20. 20.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they explode (d) they all go out
21. 21.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) the switch is OFF (d) all wires are joined
22. 22.⚡ A solar panel changes which kind of energy into electricity? (a) chemical energy (b) wind energy (c) light energy (d) sound energy
23. 23.🔍 Which is the odd one out? (a) an electric drill (b) an electric toy car (c) a tube light (d) a ceiling fan
24. 24.💡 2 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
25. 25.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
26. 26.🔍 Which is the odd one out? (a) an electric kettle (b) a room heater (c) a rice cooker (d) a loudspeaker
27. 27.Which drawing is the symbol for a wire? (a) two equal parallel lines (b) one tall, one short bar (c) a circle with M inside (d) a straight line
28. 28.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
29. 29.🔍 Which is the odd one out? (a) a siren (b) a rice cooker (c) a school bell (d) a buzzer
30. 30.True or false: a push button flips up or down. (a) False (b) True
31. 31.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
32. 32.🔍 Which is the odd one out? (a) a rubber eraser (b) a dry cork (c) a glass marble (d) a steel spoon
33. 33.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) No (b) Yes
34. 34.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a copper wire. Does the bulb glow? (a) Yes (b) No
35. 35.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity
36. 36.Which drawing is the symbol for a cell? (a) a circle with A inside (b) a long and a short line (c) a plain rectangle (d) a small empty box
37. 37.⚡ What does a street light mainly change electricity into? (a) movement (b) light (c) heat (d) sound
38. 38.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
39. 39.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) No (b) Yes
40. 40.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe

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