Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 204 · 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 toaster (b) an electric iron (c) a traffic signal (d) a rice cooker
2. 2.True or false: an electric toy car mainly gives out heat. (a) False (b) True
3. 3.💡 3 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 2 and 3 are taken out of their holders. How many bulbs glow?
4. 4.🔋 How many 1.2 V cells must be joined in series to give 9.6 V?
5. 5.True or false: to stop if a part gets hot is not safe. (a) True (b) False
6. 6.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) none (c) both of them (d) it does not matter
7. 7.🔘 Which kind of switch springs back when let go? (a) a reed switch (b) a slide switch (c) a tilt switch (d) a push button
8. 8.Which of these uses electricity? (a) a cell (b) a mobile phone (c) a battery (d) a generator
9. 9.Which of these mainly gives out light? (a) a toaster (b) an LED lamp (c) a rice cooker (d) a school bell
10. 10.True or false: to touch a switch when wet is safe. (a) False (b) True
11. 11.Which drawing is the symbol for a capacitor? (a) many long-short pairs (b) a circle with a cross (c) a circle with an X in it (d) two equal parallel lines
12. 12.True or false: to open a phone charger is safe. (a) False (b) True
13. 13.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
14. 14.Which drawing is the symbol for an LED? (a) triangle, bar and arrows (b) a circle with A inside (c) many long-short pairs (d) a circle with a cross
15. 15.Which drawing is the symbol for a wire? (a) two or more cell symbols (b) a circle with M inside (c) a small empty box (d) a straight line
16. 16.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a reed switch (c) a push button (d) a slide switch
17. 17.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. 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
18. 18.True or false: to use mains for a project is not safe. (a) True (b) False
19. 19.⚡ What does a siren mainly change electricity into? (a) heat (b) sound (c) light (d) movement
20. 20.🔘 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 OFF and C is ON. Does the bulb glow? (a) Yes (b) No
21. 21.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) quick and clear for all (d) to hide the circuit
22. 22.True or false: if a wire has come loose, the circuit is closed and current flows. (a) False (b) True
23. 23.⚡ A solar panel changes which kind of energy into electricity? (a) light energy (b) sound energy (c) wind energy (d) chemical energy
24. 24.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
25. 25.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 9 V (c) 1.5 V (d) 12 V
26. 26.Which of these is a conductor? (a) a woollen thread (b) a plastic straw (c) a wooden stick (d) a steel coin
27. 27.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
28. 28.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
29. 29.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
30. 30.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the steel shaft (c) the metal tip (d) the plastic handle
31. 31.💡 In a series circuit, how many paths does the current have? (a) one (b) none (c) two (d) one for each bulb
32. 32.🔍 Which is the odd one out? (a) a rubber band (b) a steel coin (c) a graphite rod (d) a brass key
33. 33.Which of these gives us electricity? (a) a cell (b) a television (c) a water pump (d) a washing machine
34. 34.💡 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. Bulb 2 is taken out of its holder. How many bulbs glow?
35. 35.🔘 Which kind of switch stays where you flip it? (a) a push button (b) a toggle switch (c) a reed switch (d) a tilt switch
36. 36.Which of these is safe? (a) stop if a part gets hot (b) touch a fallen wire (c) fly a kite near wires (d) poke things in a socket
37. 37.True or false: to climb an electric pole is safe. (a) True (b) False
38. 38.True or false: to use a cable with cuts is not safe. (a) True (b) False
39. 39.🔘 Two switches are in series. When does the bulb glow? (a) when both are ON (b) when both are OFF (c) when either is ON (d) never
40. 40.🔘 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 OFF. Does the bulb glow? (a) No (b) Yes

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