Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 472 · 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.💡 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
2. 2.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) not joined (d) in series
3. 3.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) one out, the rest glow (d) a single current path
4. 4.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 12 V (c) 230 V (d) 9 V
5. 5.🔘 Which kind of switch slides side to side? (a) a reed switch (b) a push button (c) a toggle switch (d) a slide switch
6. 6.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
7. 7.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
8. 8.🔍 Which is the odd one out? (a) a graphite rod (b) a brass key (c) a wooden stick (d) aluminium foil
9. 9.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
10. 10.Which of these is true of a series circuit? (a) each gets the full volts (b) one bulb out, all go out (c) used in house wiring (d) own switch for each bulb
11. 11.Which of these mainly makes sound? (a) a toaster (b) a doorbell (c) an LED lamp (d) a rice cooker
12. 12.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they explode (d) they get dimmer
13. 13.🔋 5 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
14. 14.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is OFF. Does the bulb glow? (a) No (b) Yes
15. 15.💡 2 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
16. 16.Which drawing is the symbol for an ammeter? (a) a dot where wires meet (b) a small empty box (c) a circle with A inside (d) a circle with M inside
17. 17.🔘 Which kind of switch stays where you flip it? (a) a tilt switch (b) a reed switch (c) a toggle switch (d) a push button
18. 18.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) cell (b) capacitor (c) battery (d) LED
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. Bulb 1 is taken out of its holder. How many bulbs glow?
20. 20.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the glass (c) the base (d) the filament
21. 21.True or false: a plastic straw is a conductor. (a) False (b) True
22. 22.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) one (c) none (d) two
23. 23.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
24. 24.🔋 3 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
25. 25.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) a younger child (c) nobody (d) a stranger online
26. 26.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) straight lines (d) wavy lines
27. 27.💡 4 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
28. 28.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
29. 29.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 1 glow? (a) Yes (b) No
30. 30.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a long wire (c) a plug top (d) a fuse or MCB
31. 31.💡 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?
32. 32.🔘 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) No (b) Yes
33. 33.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
34. 34.🔋 6 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
35. 35.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) symbols are heavier (c) to make it colourful (d) quick and clear for all
36. 36.🔦 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 woollen thread. Does the bulb glow? (a) No (b) Yes
37. 37.🔘 Which kind of switch springs back when let go? (a) a slide switch (b) a push button (c) a reed switch (d) a toggle switch
38. 38.🔌 Most metals are good … (a) magnets only (b) batteries (c) insulators (d) conductors
39. 39.Which of these mainly gives out light? (a) a mixer grinder (b) a room heater (c) a ceiling fan (d) a street light
40. 40.🔍 Which is the odd one out? (a) a brass key (b) a steel spoon (c) a dry cork (d) an iron nail

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