Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 474 · 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.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
2. 2.Which of these is true of a series circuit? (a) used in house wiring (b) one bulb out, all go out (c) many paths for current (d) one out, the rest glow
3. 3.🔍 Which is the odd one out? (a) a metal paper clip (b) a glass marble (c) a ceramic cup (d) a rubber band
4. 4.🔘 Which kind of switch closes when tipped over? (a) a tilt switch (b) a slide switch (c) a reed switch (d) a toggle switch
5. 5.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
6. 6.🔦 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
7. 7.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
8. 8.What does a slide switch do? (a) works only while pressed (b) slides side to side (c) flips up or down (d) closes near a magnet
9. 9.🔋 Does a battery give electricity or use electricity? (a) gives electricity (b) uses electricity
10. 10.🔋 How many 1.5 V cells must be joined in series to give 9 V?
11. 11.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 12 V (c) 230 V (d) 9 V
12. 12.🔍 Which is the odd one out? (a) a tube light (b) a loudspeaker (c) a buzzer (d) a doorbell
13. 13.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) a stranger online (c) a younger child (d) nobody
14. 14.💡 A battery lights 4 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
15. 15.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
16. 16.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) it spoils the paint (c) water makes it cold (d) it is just untidy
17. 17.🔦 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 aluminium foil. Does the bulb glow? (a) No (b) Yes
18. 18.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
19. 19.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
20. 20.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
21. 21.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) a single current path (d) many paths for current
22. 22.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
23. 23.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) straight lines (c) dotted circles (d) wavy lines
24. 24.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
25. 25.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
26. 26.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a rubber band. Does the bulb glow? (a) Yes (b) No
27. 27.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
28. 28.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
29. 29.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) a wire is cut (d) the switch is ON
30. 30.Which of these means the circuit is closed? (a) the switch is OFF (b) the bulb is unscrewed (c) a cell is taken out (d) the loop is complete
31. 31.What does a push button do? (a) flips up or down (b) stays where you flip it (c) closes when tipped over (d) works only while pressed
32. 32.🔍 Which is the odd one out? (a) a woollen thread (b) a ceramic cup (c) a wooden stick (d) a brass key
33. 33.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
34. 34.True or false: a circle with a cross is the symbol for a bulb. (a) False (b) True
35. 35.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) the longer line (d) neither line
36. 36.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a series circuit (c) a full circuit (d) a closed circuit
37. 37.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a switch that is ON (c) a cell (d) an insulator
38. 38.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 1.5 V (c) 0.5 V (d) 15 V
39. 39.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
40. 40.🔌 Is a dry cork a conductor or an insulator? (a) an insulator (b) a conductor

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