Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 656 · 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 bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) movement energy (c) sound energy (d) chemical energy
2. 2.True or false: a circle with M inside is the symbol for a motor. (a) True (b) False
3. 3.🔌 Is a ceramic cup a conductor or an insulator? (a) a conductor (b) an insulator
4. 4.🔘 A bulb and a cell are joined through 6 switches on 6 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?
5. 5.🔘 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 OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
6. 6.True or false: a push button springs back when let go. (a) False (b) True
7. 7.Which of these is safe? (a) touch a fallen wire (b) use small battery cells (c) touch a switch when wet (d) fly a kite near wires
8. 8.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
9. 9.⚡ What does a toaster mainly change electricity into? (a) movement (b) heat (c) light (d) sound
10. 10.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) open a phone charger (b) dry your hands first (c) touch a switch when wet (d) use mains for a project
12. 12.🔌 Most metals are good … (a) batteries (b) conductors (c) magnets only (d) insulators
13. 13.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a fuse or MCB (c) a bulb (d) a long wire
14. 14.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
15. 15.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) by Wi-Fi (c) in series (d) in parallel
16. 16.🔋 6 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
17. 17.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) own switch for each bulb (c) a break stops every bulb (d) one bulb out, all go out
18. 18.💡 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 3 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
19. 19.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
20. 20.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
21. 21.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
22. 22.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
23. 23.Which of these gives us electricity? (a) a computer (b) a refrigerator (c) a television (d) a cell
24. 24.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) the bulb is unscrewed (d) the loop is complete
25. 25.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
26. 26.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
27. 27.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 12 V (c) 1.5 V (d) 230 V
28. 28.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
29. 29.✏️ In a circuit diagram, which part is drawn as a straight line? (a) LED (b) bulb (c) battery (d) wire
30. 30.True or false: to use small battery cells is safe. (a) False (b) True
31. 31.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
32. 32.🔋 Does a computer give electricity or use electricity? (a) uses electricity (b) gives electricity
33. 33.Which of these gives us electricity? (a) a refrigerator (b) a television (c) a computer (d) a solar panel
34. 34.🔋 Does a refrigerator give electricity or use electricity? (a) uses electricity (b) gives electricity
35. 35.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
36. 36.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
37. 37.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) to make bulbs dim (d) so all go off together
38. 38.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
39. 39.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
40. 40.True or false: an iron nail is a conductor. (a) True (b) False

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