Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 136 · 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 of these means the circuit is closed? (a) the loop is complete (b) a cell is taken out (c) the switch is OFF (d) a wire has come loose
2. 2.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) a wire has come loose (d) all wires are joined
3. 3.True or false: to open a phone charger is safe. (a) True (b) False
4. 4.True or false: if the loop is complete, the circuit is closed and current flows. (a) False (b) True
5. 5.⚡ What does a night lamp mainly change electricity into? (a) heat (b) sound (c) movement (d) light
6. 6.💡 3 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
7. 7.True or false: a paper strip is a conductor. (a) False (b) True
8. 8.True or false: if a cell is taken out, the circuit is closed and current flows. (a) False (b) True
9. 9.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
10. 10.Which of these is a conductor? (a) a cotton thread (b) a steel coin (c) a rubber band (d) a plastic ruler
11. 11.⚡ A solar panel changes which kind of energy into electricity? (a) light energy (b) wind energy (c) sound energy (d) chemical energy
12. 12.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
13. 13.🔍 Which is the odd one out? (a) a paper strip (b) a brass key (c) a rubber band (d) a wooden stick
14. 14.True or false: if all wires are joined, the circuit is closed and current flows. (a) True (b) False
15. 15.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a switch that is ON (c) a conductor (d) an insulator
16. 16.True or false: if a wire has come loose, the circuit is open and no current flows. (a) False (b) True
17. 17.Which of these is true of a series circuit? (a) own switch for each bulb (b) many paths for current (c) each gets the full volts (d) bulbs share the voltage
18. 18.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
19. 19.True or false: a mixer grinder mainly gives out heat. (a) False (b) True
20. 20.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
21. 21.🔘 When a switch is ON, the circuit is … (a) cut (b) closed (c) broken (d) open
22. 22.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is OFF. Does the bulb glow? (a) Yes (b) No
23. 23.True or false: triangle, bar and arrows is the symbol for an LED. (a) True (b) False
24. 24.Which drawing is the symbol for a cell? (a) two or more cell symbols (b) a long and a short line (c) many long-short pairs (d) a circle with V inside
25. 25.💡 2 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
26. 26.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) motor (b) ammeter (c) bulb (d) wire
27. 27.True or false: to stop if a part gets hot is not safe. (a) True (b) False
28. 28.True or false: a paper strip is an insulator. (a) False (b) True
29. 29.What does a slide switch do? (a) slides side to side (b) springs back when let go (c) stays where you flip it (d) works only while pressed
30. 30.True or false: a straight line is the symbol for a bulb. (a) False (b) True
31. 31.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
32. 32.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) one out, the rest glow (d) bulbs share the voltage
33. 33.💡 A battery lights 4 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
34. 34.🔌 Most metals are good … (a) insulators (b) magnets only (c) conductors (d) batteries
35. 35.What does a toggle switch do? (a) works only while pressed (b) springs back when let go (c) slides side to side (d) flips up or down
36. 36.True or false: an electric drill mainly makes movement. (a) False (b) True
37. 37.🔘 Which kind of switch works only while pressed? (a) a push button (b) a slide switch (c) a reed switch (d) a toggle switch
38. 38.True or false: “a single current path” is true of a series circuit. (a) True (b) False
39. 39.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a small battery pack (c) a mains extension board (d) an inverter socket
40. 40.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) a magnet (c) sound (d) friction

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