Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 504 · 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 circuit diagram, which part is drawn as a circle with V inside? (a) voltmeter (b) switch (c) junction (d) wire
2. 2.🔍 Which is the odd one out? (a) use mains for a project (b) throw cells in a fire (c) build with an adult near (d) climb an electric pole
3. 3.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
4. 4.What does a push button do? (a) flips up or down (b) works only while pressed (c) closes when tipped over (d) stays where you flip it
5. 5.Which of these mainly makes sound? (a) a ceiling fan (b) a doorbell (c) an LED lamp (d) a mixer grinder
6. 6.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
7. 7.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) battery (b) wire (c) cell (d) junction
8. 8.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
9. 9.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
10. 10.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
11. 11.True or false: a doorbell mainly gives out light. (a) True (b) False
12. 12.💡 4 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
13. 13.⚡ A cell changes stored chemical energy into which kind of energy? (a) wind energy (b) electrical energy (c) nuclear energy (d) sound energy
14. 14.🔘 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?
15. 15.True or false: to build with an adult near is not safe. (a) True (b) False
16. 16.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
17. 17.True or false: triangle, bar and arrows is the symbol for an LED. (a) True (b) False
18. 18.Which drawing is the symbol for a cell? (a) a line lifted at a gap (b) one tall, one short bar (c) many long-short pairs (d) a dot where wires meet
19. 19.🔋 How many 2 V cells must be joined in series to give 6 V?
20. 20.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water carries current (c) water makes it cold (d) it spoils the paint
21. 21.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) used in house wiring (c) a single current path (d) bulbs share the voltage
22. 22.🔘 Which kind of switch flips up or down? (a) a reed switch (b) a toggle switch (c) a tilt switch (d) a push button
23. 23.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) Yes (b) No
24. 24.🔋 How many 3 V cells must be joined in series to give 18 V?
25. 25.💡 3 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
26. 26.🔍 Which is the odd one out? (a) stop if a part gets hot (b) fly kites in open fields (c) fly a kite near wires (d) use small battery cells
27. 27.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) in series (d) not joined
28. 28.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
29. 29.⚡ What does a doorbell mainly change electricity into? (a) heat (b) sound (c) light (d) movement
30. 30.Which of these uses electricity? (a) a battery (b) a wind turbine (c) a water pump (d) a power station
31. 31.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
32. 32.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) to save copper only (d) each gets full voltage
33. 33.Which of these mainly makes movement? (a) a toaster (b) an electric kettle (c) an exhaust fan (d) a torch
34. 34.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
35. 35.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
36. 36.🔋 3 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)? =
37. 37.Which of these is an insulator? (a) a copper wire (b) a dry cork (c) a graphite rod (d) a steel coin
38. 38.What does a slide switch do? (a) stays where you flip it (b) works only while pressed (c) springs back when let go (d) slides side to side
39. 39.Which of these means the circuit is closed? (a) a wire is cut (b) a wire has come loose (c) a cell is taken out (d) the loop is complete
40. 40.🔍 Which is the odd one out? (a) a glass marble (b) a wooden stick (c) an iron nail (d) a cotton thread

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids