Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 599 · 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 drawing is the symbol for a wire? (a) a straight line (b) a small empty box (c) a circle with A inside (d) a circle with an X in it
2. 2.⚡ What does an electric drill mainly change electricity into? (a) movement (b) light (c) sound (d) heat
3. 3.Which of these is true of a series circuit? (a) a break stops every bulb (b) many paths for current (c) each gets the full volts (d) used in house wiring
4. 4.True or false: triangle against a bar is the symbol for a diode. (a) False (b) True
5. 5.What does a push button do? (a) stays where you flip it (b) closes when tipped over (c) closes near a magnet (d) works only while pressed
6. 6.Which of these is not safe? (a) keep drinks far away (b) fly kites in open fields (c) climb an electric pole (d) use small battery cells
7. 7.🔘 Which kind of switch closes near a magnet? (a) a slide switch (b) a reed switch (c) a toggle switch (d) a tilt switch
8. 8.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
9. 9.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
10. 10.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
11. 11.💡 3 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 2 are taken out of their holders. How many bulbs glow?
12. 12.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
13. 13.⚠️ Is it safe to throw cells in a fire? (a) safe (b) not safe
14. 14.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
15. 15.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) quick and clear for all (d) to hide the circuit
16. 16.True or false: a slide switch stays where you flip it. (a) True (b) False
17. 17.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) the loop is complete (d) the switch is OFF
18. 18.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
19. 19.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
20. 20.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) when both are ON (c) when either is ON (d) never
21. 21.🔋 Does a television give electricity or use electricity? (a) gives electricity (b) uses electricity
22. 22.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
23. 23.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
24. 24.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) no voltage (c) double the voltage (d) half the voltage
25. 25.⚡ What does a room heater mainly change electricity into? (a) heat (b) movement (c) sound (d) light
26. 26.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
27. 27.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
28. 28.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
29. 29.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
30. 30.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
31. 31.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
32. 32.🔘 When a switch is ON, the circuit is … (a) broken (b) closed (c) cut (d) open
33. 33.Which of these is safe? (a) poke things in a socket (b) touch a switch when wet (c) stop if a part gets hot (d) fly a kite near wires
34. 34.Which drawing is the symbol for an LED? (a) a circle with an X in it (b) triangle, bar and arrows (c) a plain rectangle (d) a straight line
35. 35.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) electric current (c) friction (d) a magnet
36. 36.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) battery (b) cell (c) wire (d) motor
37. 37.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) little stars (c) dotted circles (d) straight lines
38. 38.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
39. 39.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
40. 40.🔦 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 steel spoon. Does the bulb glow? (a) Yes (b) No

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