Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 642 · 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 is safe? (a) climb an electric pole (b) touch a switch when wet (c) dry your hands first (d) use mains for a project
2. 2.Which of these is true of a series circuit? (a) a break stops every bulb (b) many paths for current (c) each gets the full volts (d) used in house wiring
3. 3.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
4. 4.💡 5 identical bulbs are joined in series with a 12.5 V battery (ideal wires). How many volts does each bulb get? =
5. 5.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
6. 6.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
7. 7.🔋 Does a water pump give electricity or use electricity? (a) gives electricity (b) uses electricity
8. 8.True or false: a straight line is the symbol for an LED. (a) True (b) False
9. 9.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 15 V (c) 0.5 V (d) 230 V
10. 10.🔦 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 rubber eraser. Does the bulb glow? (a) Yes (b) No
11. 11.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
12. 12.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
13. 13.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
14. 14.🔘 Which kind of switch stays where you flip it? (a) a reed switch (b) a slide switch (c) a tilt switch (d) a toggle switch
15. 15.Which of these means the circuit is closed? (a) a wire has come loose (b) the bulb is unscrewed (c) the switch is OFF (d) the switch is ON
16. 16.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) No (b) Yes
17. 17.What does a slide switch do? (a) works only while pressed (b) slides side to side (c) closes near a magnet (d) flips up or down
18. 18.True or false: a tilt switch closes when tipped over. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) a steel coin (b) a safety pin (c) aluminium foil (d) a ceramic cup
20. 20.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
21. 21.⚡ What does a ceiling fan mainly change electricity into? (a) heat (b) movement (c) sound (d) light
22. 22.🔍 Which is the odd one out? (a) a wooden stick (b) a brass key (c) an iron nail (d) aluminium foil
23. 23.🔘 A bulb and a cell are joined through 5 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
24. 24.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) used in house wiring (d) one bulb out, all go out
25. 25.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 12 V (c) 230 V (d) 9 V
26. 26.True or false: a push button works only while pressed. (a) False (b) True
27. 27.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
28. 28.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) Yes (b) No
29. 29.🔍 Which is the odd one out? (a) a plastic ruler (b) a ceramic cup (c) a cotton thread (d) a copper wire
30. 30.🔍 Which is the odd one out? (a) stay away from pylons (b) keep drinks far away (c) touch a fallen wire (d) take cells out after use
31. 31.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
32. 32.True or false: a reed switch closes near a magnet. (a) False (b) True
33. 33.True or false: a slide switch stays where you flip it. (a) True (b) False
34. 34.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) Yes (b) No
35. 35.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
36. 36.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) neither line (c) the longer line (d) the shorter line
37. 37.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a mains extension board (c) a small battery pack (d) a wall socket
38. 38.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are OFF (c) when both are ON (d) when either is ON
39. 39.💡 A battery lights 2 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
40. 40.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False

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