Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 104 · 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.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
2. 2.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
3. 3.True or false: a dry cork is a conductor. (a) True (b) False
4. 4.🔘 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?
5. 5.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
6. 6.🔋 What should you do with used-up cells? (a) cut them open (b) throw them in a fire (c) bury them in soil (d) give them for recycling
7. 7.True or false: to stop if a part gets hot is not safe. (a) False (b) True
8. 8.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
9. 9.Which of these gives us electricity? (a) a refrigerator (b) a television (c) a mobile phone (d) a power station
10. 10.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they keep glowing (d) they explode
11. 11.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
12. 12.🔘 Which kind of switch stays where you flip it? (a) a push button (b) a toggle switch (c) a slide switch (d) a reed switch
13. 13.🔦 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 ceramic cup. Does the bulb glow? (a) Yes (b) No
14. 14.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
15. 15.True or false: to touch a switch when wet is not safe. (a) True (b) False
16. 16.True or false: to open a phone charger is safe. (a) False (b) True
17. 17.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
18. 18.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) no voltage (c) the same voltage (d) a smaller voltage
19. 19.💡 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?
20. 20.Which of these means the circuit is open? (a) a wire is cut (b) the switch is ON (c) all wires are joined (d) the loop is complete
21. 21.Which of these is an insulator? (a) a glass marble (b) a steel spoon (c) a copper wire (d) an iron nail
22. 22.True or false: a torch mainly makes sound. (a) False (b) True
23. 23.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
24. 24.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) Yes (b) No
25. 25.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
26. 26.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
27. 27.🔋 What is a battery? (a) a switch with a lid (b) a kind of bulb (c) one single wire (d) two or more cells joined
28. 28.Which of these is an insulator? (a) a plastic straw (b) a brass key (c) a graphite rod (d) a steel coin
29. 29.Which of these uses electricity? (a) a refrigerator (b) a bicycle dynamo (c) a wind turbine (d) a power station
30. 30.🔍 Which is the odd one out? (a) touch a switch when wet (b) stay away from pylons (c) fly kites in open fields (d) use small battery cells
31. 31.🔘 Which kind of switch works only while pressed? (a) a slide switch (b) a tilt switch (c) a push button (d) a reed switch
32. 32.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
33. 33.True or false: a rubber eraser is a conductor. (a) False (b) True
34. 34.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
35. 35.True or false: triangle, bar and arrows is the symbol for an LED. (a) False (b) True
36. 36.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) bulbs share the voltage (d) used in house wiring
37. 37.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
38. 38.Which of these mainly gives out light? (a) an electric drill (b) an electric iron (c) a street light (d) a loudspeaker
39. 39.Which of these mainly gives out heat? (a) a buzzer (b) a ceiling fan (c) an electric kettle (d) a doorbell
40. 40.Which drawing is the symbol for a bulb? (a) one tall, one short bar (b) two equal parallel lines (c) a long and a short line (d) a circle with an X in it

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