Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 384 · 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.🔍 Which is the odd one out? (a) a loudspeaker (b) a buzzer (c) a doorbell (d) a ceiling fan
2. 2.💡 2 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
3. 3.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
4. 4.True or false: a toggle switch flips up or down. (a) True (b) False
5. 5.True or false: a line lifted at a gap is the symbol for a switch. (a) False (b) True
6. 6.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 12 V (c) 1.5 V (d) 9 V
7. 7.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
8. 8.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a plastic ruler. Does the bulb glow? (a) Yes (b) No
9. 9.True or false: to throw cells in a fire is not safe. (a) False (b) True
10. 10.🔘 A bulb and a cell are joined through 4 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
11. 11.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
12. 12.🔍 Which is the odd one out? (a) dry your hands first (b) take cells out after use (c) use mains for a project (d) use small battery cells
13. 13.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
14. 14.💡 A battery lights 5 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.🔦 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 rubber band. Does the bulb glow? (a) Yes (b) No
16. 16.True or false: a tilt switch works only while pressed. (a) True (b) False
17. 17.True or false: if a cell is taken out, the circuit is closed and current flows. (a) False (b) True
18. 18.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
19. 19.Which of these mainly gives out heat? (a) a loudspeaker (b) a buzzer (c) a traffic signal (d) a toaster
20. 20.What does a reed switch do? (a) stays where you flip it (b) closes near a magnet (c) flips up or down (d) slides side to side
21. 21.True or false: to take cells out after use is safe. (a) True (b) False
22. 22.💡 4 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
23. 23.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the bare end (c) the plastic handle (d) the steel shaft
24. 24.True or false: a paper strip is an insulator. (a) True (b) False
25. 25.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
26. 26.🔍 Which is the odd one out? (a) a copper wire (b) an iron nail (c) a cotton thread (d) a safety pin
27. 27.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) no voltage (c) the same voltage (d) a smaller voltage
28. 28.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
29. 29.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a break stops every bulb (c) a single current path (d) many paths for current
30. 30.Which of these means the circuit is open? (a) the switch is ON (b) a cell is taken out (c) the loop is complete (d) all wires are joined
31. 31.🔘 Which kind of switch stays where you flip it? (a) a push button (b) a tilt switch (c) a reed switch (d) a toggle switch
32. 32.🔍 Which is the odd one out? (a) take cells out after use (b) use small battery cells (c) fly a kite near wires (d) stay away from pylons
33. 33.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) water carries current (c) water makes it cold (d) it is just untidy
34. 34.💡 In a series circuit, how many paths does the current have? (a) one (b) none (c) one for each bulb (d) two
35. 35.Which of these means the circuit is closed? (a) the switch is ON (b) a wire is cut (c) a cell is taken out (d) a wire has come loose
36. 36.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
37. 37.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) dotted circles (c) little stars (d) wavy lines
38. 38.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) wire (b) voltmeter (c) ammeter (d) bulb
39. 39.Which of these is a conductor? (a) a brass key (b) a wooden stick (c) a plastic ruler (d) a woollen thread
40. 40.⚡ What does an electric drill mainly change electricity into? (a) sound (b) heat (c) light (d) movement

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