Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 546 · 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.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they explode (d) they keep glowing
2. 2.Which of these is safe? (a) use mains for a project (b) fly kites in open fields (c) throw cells in a fire (d) touch a fallen wire
3. 3.⚡ What does an electric iron mainly change electricity into? (a) heat (b) movement (c) light (d) sound
4. 4.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a tilt switch (c) a slide switch (d) a reed switch
5. 5.🔍 Which is the odd one out? (a) an electric iron (b) an LED lamp (c) a torch (d) a night lamp
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.Which of these is an insulator? (a) a plastic ruler (b) aluminium foil (c) a graphite rod (d) a brass key
8. 8.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
9. 9.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
10. 10.🔋 A 3 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
11. 11.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a steel coin. Does the bulb glow? (a) Yes (b) No
12. 12.🔘 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 OFF. Does the bulb glow? (a) Yes (b) No
13. 13.💡 5 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 4 is taken out of its holder. Does bulb 5 glow? (a) No (b) Yes
14. 14.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
15. 15.Which of these is an insulator? (a) a metal paper clip (b) a steel spoon (c) a copper wire (d) a paper strip
16. 16.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
17. 17.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
18. 18.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) quick and clear for all (c) symbols are heavier (d) to make it colourful
19. 19.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
20. 20.🔁 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
21. 21.Which of these is not safe? (a) use small battery cells (b) keep drinks far away (c) touch a switch when wet (d) dry your hands first
22. 22.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) it is just untidy (c) it spoils the paint (d) water makes it cold
23. 23.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) pour water on them (c) shout for an adult (d) wait and watch
24. 24.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) a doorbell (b) an electric kettle (c) a buzzer (d) a loudspeaker
26. 26.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
27. 27.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) nuclear energy (c) wind energy (d) electrical energy
28. 28.Which drawing is the symbol for a battery? (a) a circle with an X in it (b) two or more cell symbols (c) triangle, bar and arrows (d) one tall, one short bar
29. 29.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 230 V (c) 12 V (d) 1.5 V
30. 30.Which of these is a conductor? (a) a plastic ruler (b) a ceramic cup (c) a glass marble (d) a steel coin
31. 31.⚡ A solar panel changes which kind of energy into electricity? (a) chemical energy (b) sound energy (c) wind energy (d) light energy
32. 32.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
33. 33.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) No (b) Yes
34. 34.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) cell (b) LED (c) wire (d) resistor
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) the same (b) brighter (c) dimmer
36. 36.Which of these is a conductor? (a) a copper wire (b) a wooden stick (c) a plastic straw (d) a rubber eraser
37. 37.🔍 Which is the odd one out? (a) a paper strip (b) a steel spoon (c) a graphite rod (d) a steel coin
38. 38.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
39. 39.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
40. 40.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False

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