Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 213 · 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.🔋 3 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)? =
2. 2.🔌 Most metals are good … (a) batteries (b) magnets only (c) conductors (d) insulators
3. 3.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) a break stops every bulb (d) one out, the rest glow
4. 4.💡 4 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 3 are taken out of their holders. How many bulbs glow?
5. 5.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
6. 6.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a bulb (c) a plug top (d) a fuse or MCB
7. 7.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) quick and clear for all (c) to hide the circuit (d) symbols are heavier
8. 8.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
9. 9.True or false: to poke things in a socket is safe. (a) True (b) False
10. 10.Which of these is a conductor? (a) a plastic ruler (b) a dry cork (c) a cotton thread (d) a brass key
11. 11.Which drawing is the symbol for a motor? (a) a circle with M inside (b) a long and a short line (c) a plain rectangle (d) a circle with V inside
12. 12.🔍 Which is the odd one out? (a) a school bell (b) a buzzer (c) a doorbell (d) a room heater
13. 13.🔍 Which is the odd one out? (a) a table fan (b) an exhaust fan (c) a toaster (d) an electric toy car
14. 14.💡 4 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?
15. 15.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
16. 16.Which of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) many paths for current (d) a single current path
17. 17.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) so all go off together (d) each gets full voltage
18. 18.🔍 Which is the odd one out? (a) a water heater (b) a room heater (c) an electric kettle (d) a tube light
19. 19.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator
20. 20.True or false: a street light mainly gives out light. (a) True (b) False
21. 21.Which of these mainly gives out heat? (a) a ceiling fan (b) a doorbell (c) an LED lamp (d) a water heater
22. 22.🔍 Which is the odd one out? (a) an electric kettle (b) a doorbell (c) a loudspeaker (d) a buzzer
23. 23.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
24. 24.True or false: to climb an electric pole is safe. (a) False (b) True
25. 25.Which of these is a conductor? (a) a rubber eraser (b) a ceramic cup (c) a metal paper clip (d) a glass marble
26. 26.🔘 When a switch is ON, the circuit is … (a) cut (b) closed (c) broken (d) open
27. 27.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
28. 28.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
29. 29.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) junction (b) LED (c) battery (d) switch
30. 30.True or false: a toggle switch flips up or down. (a) False (b) True
31. 31.Which of these is not safe? (a) dry your hands first (b) fly kites in open fields (c) keep drinks far away (d) touch a switch when wet
32. 32.🔍 Which is the odd one out? (a) use mains for a project (b) keep drinks far away (c) fly a kite near wires (d) touch a fallen wire
33. 33.Which drawing is the symbol for a bulb? (a) a long and a short line (b) a straight line (c) two or more cell symbols (d) a circle with a cross
34. 34.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) the same voltage (c) no voltage (d) half the voltage
35. 35.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a reed switch (c) a push button (d) a toggle switch
36. 36.💡 2 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
37. 37.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
38. 38.🔋 Does a wind turbine give electricity or use electricity? (a) gives electricity (b) uses electricity
39. 39.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
40. 40.What does a push button do? (a) slides side to side (b) works only while pressed (c) stays where you flip it (d) closes when tipped over

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