Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 39 · 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.True or false: a graphite rod is a conductor. (a) True (b) False
2. 2.🔋 5 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)? =
3. 3.Which of these is not safe? (a) dry your hands first (b) fly a kite near wires (c) stop if a part gets hot (d) take cells out after use
4. 4.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
5. 5.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
6. 6.💡 5 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. Does bulb 5 glow? (a) Yes (b) No
7. 7.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
8. 8.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
9. 9.Which drawing is the symbol for a bulb? (a) a straight line (b) a circle with an X in it (c) two equal parallel lines (d) a circle with M inside
10. 10.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a conductor (c) a switch that is ON (d) an insulator
11. 11.💡 In a series circuit, how many paths does the current have? (a) one (b) none (c) two (d) one for each bulb
12. 12.Which of these is true of a series circuit? (a) one out, the rest glow (b) own switch for each bulb (c) many paths for current (d) bulbs share the voltage
13. 13.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
14. 14.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) water drops (c) dust particles (d) electrons
15. 15.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
16. 16.🔋 What should you do with used-up cells? (a) bury them in soil (b) throw them in a fire (c) cut them open (d) give them for recycling
17. 17.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) No (b) Yes
18. 18.Which of these is a conductor? (a) a cotton thread (b) aluminium foil (c) a plastic straw (d) a rubber eraser
19. 19.🔘 Which kind of switch springs back when let go? (a) a slide switch (b) a tilt switch (c) a push button (d) a toggle switch
20. 20.True or false: triangle against a bar is the symbol for a voltmeter. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) a plastic ruler (b) a brass key (c) a ceramic cup (d) a woollen thread
22. 22.Which drawing is the symbol for a cell? (a) a small empty box (b) a circle with A inside (c) a long and a short line (d) a dot where wires meet
23. 23.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a smaller voltage (c) a bigger voltage (d) the same voltage
24. 24.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 1.5 V (c) 12 V (d) 9 V
25. 25.True or false: a slide switch stays where you flip it. (a) False (b) True
26. 26.🔘 Which kind of switch closes near a magnet? (a) a toggle switch (b) a push button (c) a slide switch (d) a reed switch
27. 27.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) switch (b) bulb (c) resistor (d) battery
28. 28.💡 6 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 5 are taken out of their holders. How many bulbs glow?
29. 29.True or false: to take cells out after use is not safe. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) a table fan (b) a mixer grinder (c) an exhaust fan (d) a torch
31. 31.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) to make bulbs dim (d) each gets full voltage
32. 32.🔋 How many 1.5 V cells must be joined in series to give 6 V?
33. 33.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
34. 34.🔌 Most metals are good … (a) magnets only (b) conductors (c) batteries (d) insulators
35. 35.💡 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) the same (c) dimmer
36. 36.🔘 Which kind of switch works only while pressed? (a) a tilt switch (b) a push button (c) a toggle switch (d) a slide switch
37. 37.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they keep glowing (d) they explode
38. 38.⚡ What does an exhaust fan mainly change electricity into? (a) heat (b) movement (c) sound (d) light
39. 39.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
40. 40.🔍 Which is the odd one out? (a) a graphite rod (b) a metal paper clip (c) an iron nail (d) a wooden stick

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