Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 395 · 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 series with a 6 V battery (ideal wires). How many volts does each bulb get? =
2. 2.💡 A battery lights 3 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
3. 3.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) plastic is a conductor (c) plastic makes current (d) to make them heavy
4. 4.🔘 Which kind of switch closes when tipped over? (a) a toggle switch (b) a reed switch (c) a slide switch (d) a tilt switch
5. 5.True or false: a line lifted at a gap is the symbol for a junction. (a) True (b) False
6. 6.🔦 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 eraser. Does the bulb glow? (a) Yes (b) No
7. 7.🔘 When a switch is ON, the circuit is … (a) open (b) closed (c) cut (d) broken
8. 8.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 12 V (c) 1.5 V (d) 9 V
9. 9.🔍 Which is the odd one out? (a) a loudspeaker (b) a school bell (c) a water heater (d) a siren
10. 10.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
11. 11.🔋 5 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
12. 12.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
13. 13.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
14. 14.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
15. 15.🔁 What must there be for a current to flow? (a) one loose end (b) a plastic gap (c) a complete loop (d) a broken path
16. 16.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
17. 17.⚡ What does a mixer grinder mainly change electricity into? (a) movement (b) light (c) heat (d) sound
18. 18.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
19. 19.🔦 A circuit has a used-up (dead) 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
20. 20.True or false: a circle with an X in it is the symbol for a switch. (a) False (b) True
21. 21.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
22. 22.🔌 Is a plastic ruler a conductor or an insulator? (a) an insulator (b) a conductor
23. 23.Which drawing is the symbol for a resistor? (a) triangle against a bar (b) a small empty box (c) a long and a short line (d) a circle with V inside
24. 24.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) straight lines (c) little stars (d) dotted circles
25. 25.True or false: if the switch is ON, the circuit is open and no current flows. (a) False (b) True
26. 26.🔍 Which is the odd one out? (a) use small battery cells (b) touch a switch when wet (c) use a cable with cuts (d) poke things in a socket
27. 27.True or false: a tilt switch closes when tipped over. (a) False (b) True
28. 28.True or false: to fly kites in open fields is not safe. (a) True (b) False
29. 29.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
30. 30.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
31. 31.Which of these is an insulator? (a) a ceramic cup (b) a graphite rod (c) a metal paper clip (d) a safety pin
32. 32.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
33. 33.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
34. 34.💡 3 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
35. 35.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
36. 36.💡 A battery lights 4 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
37. 37.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) neither line (d) the shorter line
38. 38.🔋 What is a battery? (a) a switch with a lid (b) one single wire (c) a kind of bulb (d) two or more cells joined
39. 39.💡 5 identical bulbs are joined in series with a 12.5 V battery (ideal wires). How many volts does each bulb get? =
40. 40.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) No (b) Yes

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