Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 840 · 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.True or false: a toaster mainly makes sound. (a) True (b) False
2. 2.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
3. 3.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
4. 4.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
5. 5.Which of these is safe? (a) touch a switch when wet (b) climb an electric pole (c) keep drinks far away (d) poke things in a socket
6. 6.Which of these mainly gives out heat? (a) a school bell (b) a siren (c) a water heater (d) an electric drill
7. 7.🔁 What must there be for a current to flow? (a) a broken path (b) a complete loop (c) a plastic gap (d) one loose end
8. 8.🔋 Does a refrigerator give electricity or use electricity? (a) uses electricity (b) gives electricity
9. 9.🔘 Which kind of switch stays where you flip it? (a) a push button (b) a reed switch (c) a tilt switch (d) a toggle switch
10. 10.🔌 Most metals are good … (a) magnets only (b) batteries (c) conductors (d) insulators
11. 11.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
12. 12.Which of these is safe? (a) dry your hands first (b) open a phone charger (c) fly a kite near wires (d) touch a switch when wet
13. 13.⚡ What does a loudspeaker mainly change electricity into? (a) heat (b) sound (c) movement (d) light
14. 14.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
15. 15.⚡ What does an electric kettle mainly change electricity into? (a) movement (b) light (c) sound (d) heat
16. 16.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
17. 17.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
18. 18.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
19. 19.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) wind energy (c) nuclear energy (d) electrical energy
20. 20.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) straight lines (d) wavy lines
21. 21.Which drawing is the symbol for a wire? (a) a straight line (b) a line lifted at a gap (c) a circle with a cross (d) one tall, one short bar
22. 22.True or false: to open a phone charger is safe. (a) True (b) False
23. 23.💡 6 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. Bulbs 1 and 3 are taken out of their holders. How many bulbs glow?
24. 24.Which of these is an insulator? (a) an iron nail (b) a rubber band (c) a safety pin (d) a copper wire
25. 25.🔍 Which is the odd one out? (a) a ceramic cup (b) aluminium foil (c) a plastic straw (d) a rubber eraser
26. 26.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
27. 27.Which of these is a conductor? (a) a metal paper clip (b) a glass marble (c) a paper strip (d) a ceramic cup
28. 28.🔘 Which kind of switch closes when tipped over? (a) a tilt switch (b) a toggle switch (c) a push button (d) a slide switch
29. 29.What does a slide switch do? (a) works only while pressed (b) springs back when let go (c) slides side to side (d) flips up or down
30. 30.💡 A battery lights 2 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
31. 31.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
32. 32.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
33. 33.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
34. 34.True or false: a toggle switch stays where you flip it. (a) False (b) True
35. 35.🔘 Which kind of switch springs back when let go? (a) a toggle switch (b) a slide switch (c) a push button (d) a reed switch
36. 36.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
37. 37.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
38. 38.💡 A battery lights 5 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
39. 39.🔋 5 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
40. 40.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False

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