Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 671 · 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 is the odd one out? (a) a doorbell (b) a school bell (c) a buzzer (d) an electric kettle
2. 2.🔍 Which is the odd one out? (a) throw cells in a fire (b) use mains for a project (c) use a cable with cuts (d) stay away from pylons
3. 3.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
4. 4.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the switch is ON (d) the switch is OFF
5. 5.🔌 Is a steel spoon a conductor or an insulator? (a) a conductor (b) an insulator
6. 6.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
7. 7.🔘 A bulb and a cell are joined through 5 switches on 5 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?
8. 8.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) to save copper only (d) so all go off together
9. 9.True or false: a plastic ruler is a conductor. (a) True (b) False
10. 10.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
11. 11.Which of these is not safe? (a) build with an adult near (b) touch a switch when wet (c) dry your hands first (d) take cells out after use
12. 12.True or false: a siren mainly makes sound. (a) True (b) False
13. 13.Which drawing is the symbol for a motor? (a) two or more cell symbols (b) a circle with M inside (c) triangle, bar and arrows (d) a circle with an X in it
14. 14.🔍 Which is the odd one out? (a) a rubber eraser (b) a ceramic cup (c) a dry cork (d) an iron nail
15. 15.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) motor (b) bulb (c) junction (d) resistor
16. 16.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) a cell is taken out (d) all wires are joined
17. 17.True or false: to touch a switch when wet is not safe. (a) True (b) False
18. 18.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is ON, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
19. 19.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
20. 20.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) LED (b) voltmeter (c) capacitor (d) bulb
21. 21.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) when both are ON (c) when both are OFF (d) never
22. 22.🔘 Which kind of switch closes when tipped over? (a) a slide switch (b) a push button (c) a tilt switch (d) a reed switch
23. 23.True or false: a rubber band is a conductor. (a) True (b) False
24. 24.True or false: to keep drinks far away is not safe. (a) False (b) True
25. 25.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
26. 26.🔌 Is a ceramic cup a conductor or an insulator? (a) an insulator (b) a conductor
27. 27.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they all go out (c) they keep glowing (d) they get dimmer
28. 28.🔍 Which is the odd one out? (a) a ceramic cup (b) a rubber eraser (c) a steel coin (d) a glass marble
29. 29.True or false: a brass key is a conductor. (a) False (b) True
30. 30.Which drawing is the symbol for a junction? (a) a dot where wires meet (b) a plain rectangle (c) a circle with an X in it (d) two or more cell symbols
31. 31.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
32. 32.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. How many bulbs glow?
33. 33.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) a safety pin (b) a dry cork (c) a plastic straw (d) a ceramic cup
35. 35.Which drawing is the symbol for a bulb? (a) triangle against a bar (b) a circle with A inside (c) a circle with an X in it (d) a line lifted at a gap
36. 36.True or false: “a single current path” is true of a series circuit. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) a buzzer (b) a doorbell (c) a mixer grinder (d) a loudspeaker
38. 38.True or false: a slide switch works only while pressed. (a) False (b) True
39. 39.True or false: a push button stays where you flip it. (a) False (b) True
40. 40.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe

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