Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 912 · 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 longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
2. 2.🔋 Does a solar panel give electricity or use electricity? (a) gives electricity (b) uses electricity
3. 3.🔦 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
4. 4.🔋 How many 3 V cells must be joined in series to give 6 V?
5. 5.Which of these is not safe? (a) dry your hands first (b) fly kites in open fields (c) touch a fallen wire (d) stay away from pylons
6. 6.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
7. 7.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) No (b) Yes
8. 8.🔍 Which is the odd one out? (a) aluminium foil (b) a paper strip (c) a steel coin (d) a copper wire
9. 9.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
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 ON. Does the bulb glow? (a) Yes (b) No
11. 11.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
12. 12.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when either is ON (c) when both are OFF (d) when both are ON
13. 13.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
14. 14.Which of these is an insulator? (a) an iron nail (b) a safety pin (c) a cotton thread (d) a graphite rod
15. 15.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
16. 16.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
17. 17.Which of these is safe? (a) touch a switch when wet (b) stay away from pylons (c) poke things in a socket (d) touch a fallen wire
18. 18.🔦 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 steel coin. Does the bulb glow? (a) No (b) Yes
19. 19.💡 4 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
20. 20.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
21. 21.Which of these mainly makes movement? (a) a mixer grinder (b) a toaster (c) a night lamp (d) an LED lamp
22. 22.🔘 A bulb and a cell are joined through 3 switches on 3 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
23. 23.True or false: a brass key is an insulator. (a) True (b) False
24. 24.💡 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) brighter (c) the same
25. 25.True or false: a reed switch stays where you flip it. (a) True (b) False
26. 26.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
27. 27.🔦 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
28. 28.Which of these mainly gives out light? (a) an LED lamp (b) an electric drill (c) an exhaust fan (d) a toaster
29. 29.🔍 Which is the odd one out? (a) dry your hands first (b) keep drinks far away (c) throw cells in a fire (d) take cells out after use
30. 30.🔘 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 ON, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
31. 31.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
32. 32.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a tilt switch (c) a reed switch (d) a push button
33. 33.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) each gets full voltage (d) to save copper only
34. 34.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
35. 35.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) battery (b) ammeter (c) voltmeter (d) junction
36. 36.🔦 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
37. 37.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) friction (c) sound (d) electric current
38. 38.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
39. 39.🔦 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
40. 40.What does a push button do? (a) closes near a magnet (b) flips up or down (c) slides side to side (d) works only while pressed

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