Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 998 · 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.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
2. 2.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
3. 3.🔘 Which kind of switch closes near a magnet? (a) a push button (b) a reed switch (c) a slide switch (d) a toggle switch
4. 4.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
5. 5.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
6. 6.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the plastic handle (c) the steel shaft (d) the bare end
7. 7.True or false: a plastic ruler is an insulator. (a) False (b) True
8. 8.🔦 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 cotton thread. Does the bulb glow? (a) No (b) Yes
9. 9.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) electrons (c) water drops (d) photons
10. 10.⚡ What does a mixer grinder mainly change electricity into? (a) light (b) sound (c) movement (d) heat
11. 11.🔦 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 dry cork. Does the bulb glow? (a) No (b) Yes
12. 12.Which of these means the circuit is closed? (a) a cell is taken out (b) the bulb is unscrewed (c) all wires are joined (d) the switch is OFF
13. 13.🔍 Which is the odd one out? (a) aluminium foil (b) an iron nail (c) a steel spoon (d) a rubber eraser
14. 14.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
15. 15.🔍 Which is the odd one out? (a) a metal paper clip (b) a ceramic cup (c) aluminium foil (d) a steel coin
16. 16.Which of these is safe? (a) climb an electric pole (b) use mains for a project (c) touch a fallen wire (d) use small battery cells
17. 17.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) No (b) Yes
18. 18.Which of these mainly gives out heat? (a) a loudspeaker (b) a siren (c) a rice cooker (d) an exhaust fan
19. 19.🔍 Which is the odd one out? (a) fly kites in open fields (b) build with an adult near (c) throw cells in a fire (d) take cells out after use
20. 20.Which of these means the circuit is closed? (a) the switch is OFF (b) a wire has come loose (c) the bulb is unscrewed (d) the switch is ON
21. 21.Which of these mainly gives out light? (a) an electric iron (b) an electric kettle (c) a torch (d) a room heater
22. 22.Which of these is not safe? (a) keep drinks far away (b) use small battery cells (c) touch a switch when wet (d) build with an adult near
23. 23.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a wall socket (c) an inverter socket (d) a small battery pack
24. 24.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
25. 25.Which drawing is the symbol for a bulb? (a) two equal parallel lines (b) one tall, one short bar (c) a circle with a cross (d) many long-short pairs
26. 26.💡 3 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
27. 27.True or false: a toggle switch works only while pressed. (a) False (b) True
28. 28.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
29. 29.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) never (c) when both are ON (d) when either is ON
30. 30.True or false: one tall, one short bar is the symbol for a bulb. (a) True (b) False
31. 31.🔋 Does a wind turbine give electricity or use electricity? (a) gives electricity (b) uses electricity
32. 32.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they keep glowing (d) they all go out
33. 33.True or false: a safety pin is a conductor. (a) False (b) True
34. 34.💡 A battery lights 2 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
35. 35.True or false: to stay away from pylons is not safe. (a) False (b) True
36. 36.What does a reed switch do? (a) flips up or down (b) stays where you flip it (c) closes near a magnet (d) slides side to side
37. 37.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a push button (c) a slide switch (d) a tilt switch
38. 38.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to save copper only (d) to make bulbs dim
39. 39.🔘 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 ON and C is ON. Does the bulb glow? (a) Yes (b) No
40. 40.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No

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