Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 478 · 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.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
2. 2.🔍 Which is the odd one out? (a) climb an electric pole (b) stop if a part gets hot (c) keep drinks far away (d) use small battery cells
3. 3.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) No (b) Yes
4. 4.Which drawing is the symbol for a motor? (a) a circle with M inside (b) a circle with an X in it (c) one tall, one short bar (d) a dot where wires meet
5. 5.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
6. 6.True or false: a dry cork is a conductor. (a) False (b) True
7. 7.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) chemical energy (c) light energy (d) sound energy
8. 8.💡 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
9. 9.Which of these mainly gives out light? (a) a loudspeaker (b) a buzzer (c) a siren (d) a night lamp
10. 10.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) a plastic straw (b) a rubber band (c) a safety pin (d) a plastic ruler
12. 12.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
13. 13.🔘 A bulb and a cell are joined through 2 switches on 2 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
14. 14.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to make bulbs dim (d) to save copper only
15. 15.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) both lines (d) the longer line
16. 16.True or false: a safety pin is an insulator. (a) True (b) False
17. 17.True or false: a buzzer mainly gives out light. (a) True (b) False
18. 18.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
19. 19.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) the same voltage (c) a bigger voltage (d) a smaller voltage
20. 20.Which of these mainly gives out heat? (a) a traffic signal (b) a toaster (c) a siren (d) a night lamp
21. 21.Which of these mainly makes sound? (a) a room heater (b) a night lamp (c) a rice cooker (d) a doorbell
22. 22.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
23. 23.🔋 What is a battery? (a) one single wire (b) a kind of bulb (c) two or more cells joined (d) a switch with a lid
24. 24.🔍 Which is the odd one out? (a) a dry cork (b) a steel spoon (c) aluminium foil (d) a metal paper clip
25. 25.🔋 A 3 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
26. 26.True or false: a long and a short line is the symbol for a cell. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) stop if a part gets hot (b) use small battery cells (c) use a cable with cuts (d) build with an adult near
28. 28.🔍 Which is the odd one out? (a) a rice cooker (b) an electric iron (c) a traffic signal (d) a water heater
29. 29.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the bulb is unscrewed (d) the switch is ON
30. 30.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 12 V (c) 1.5 V (d) 9 V
31. 31.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
32. 32.True or false: a push button works only while pressed. (a) False (b) True
33. 33.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) LED (b) cell (c) battery (d) junction
34. 34.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
35. 35.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
36. 36.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
37. 37.True or false: if a cell is taken out, the circuit is closed and current flows. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) touch a fallen wire (b) climb an electric pole (c) use mains for a project (d) take cells out after use
39. 39.🔍 Which is the odd one out? (a) keep drinks far away (b) use a cable with cuts (c) fly a kite near wires (d) poke things in a socket
40. 40.Which of these is not safe? (a) keep drinks far away (b) open a phone charger (c) stay away from pylons (d) fly kites in open fields

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