Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 458 · 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 end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
2. 2.True or false: a long and a short line is the symbol for a battery. (a) True (b) False
3. 3.True or false: to stay away from pylons is not safe. (a) True (b) False
4. 4.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the bare end (c) the steel shaft (d) the plastic handle
5. 5.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) LED (b) motor (c) cell (d) capacitor
6. 6.🔋 Does a power station give electricity or use electricity? (a) uses electricity (b) gives electricity
7. 7.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
8. 8.🔍 Which is the odd one out? (a) a street light (b) an LED lamp (c) a tube light (d) a loudspeaker
9. 9.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
10. 10.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
11. 11.💡 5 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 3 and 5 are taken out of their holders. How many bulbs glow?
12. 12.Which of these means the circuit is closed? (a) the switch is OFF (b) the bulb is unscrewed (c) a wire has come loose (d) the loop is complete
13. 13.💡 A battery lights 3 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
14. 14.🔋 How many 1.2 V cells must be joined in series to give 7.2 V?
15. 15.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) sound energy (c) light energy (d) chemical energy
16. 16.What does a toggle switch do? (a) springs back when let go (b) stays where you flip it (c) works only while pressed (d) closes near a magnet
17. 17.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) resistor (b) wire (c) ammeter (d) battery
18. 18.Which drawing is the symbol for a battery? (a) a long and a short line (b) two or more cell symbols (c) triangle, bar and arrows (d) a straight line
19. 19.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) so all go off together (d) each gets full voltage
20. 20.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
21. 21.🔋 What should you do with used-up cells? (a) bury them in soil (b) give them for recycling (c) throw them in a fire (d) cut them open
22. 22.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) to hide the circuit (c) symbols are heavier (d) quick and clear for all
23. 23.🔍 Which is the odd one out? (a) an iron nail (b) a steel coin (c) a rubber band (d) a steel spoon
24. 24.True or false: an LED lamp mainly gives out heat. (a) True (b) False
25. 25.True or false: to stop if a part gets hot is safe. (a) False (b) True
26. 26.True or false: if a wire has come loose, the circuit is closed and current flows. (a) True (b) False
27. 27.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
28. 28.⚠️ Is it safe to touch a switch when wet? (a) safe (b) not safe
29. 29.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 1.5 V (c) 9 V (d) 12 V
30. 30.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) No (b) Yes
31. 31.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) True (b) False
32. 32.Which of these is safe? (a) fly a kite near wires (b) climb an electric pole (c) throw cells in a fire (d) use small battery cells
33. 33.🔍 Which is the odd one out? (a) a night lamp (b) a school bell (c) a tube light (d) an LED lamp
34. 34.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 0.5 V (c) 1.5 V (d) 15 V
35. 35.True or false: if the switch is OFF, the circuit is open and no current flows. (a) True (b) False
36. 36.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) Yes (b) No
37. 37.🔍 Which is the odd one out? (a) a buzzer (b) a siren (c) a doorbell (d) a room heater
38. 38.Which of these is not safe? (a) take cells out after use (b) use small battery cells (c) stop if a part gets hot (d) use mains for a project
39. 39.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
40. 40.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel

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