Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 846 · 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 mainly gives out heat? (a) a night lamp (b) an exhaust fan (c) a table fan (d) a room heater
2. 2.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
3. 3.True or false: a small empty box is the symbol for a wire. (a) True (b) False
4. 4.Which of these gives us electricity? (a) a battery (b) a refrigerator (c) a computer (d) a television
5. 5.💡 A battery lights 5 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
6. 6.What does a slide switch do? (a) stays where you flip it (b) springs back when let go (c) slides side to side (d) closes near a magnet
7. 7.True or false: a toggle switch stays where you flip it. (a) False (b) True
8. 8.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) battery (b) wire (c) cell (d) ammeter
9. 9.True or false: to climb an electric pole is safe. (a) False (b) True
10. 10.Which of these is true of a parallel circuit? (a) used in house wiring (b) bulbs share the voltage (c) one bulb out, all go out (d) a single current path
11. 11.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to save copper only (c) to make bulbs dim (d) so all go off together
12. 12.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) True (b) False
13. 13.🔦 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) No (b) Yes
14. 14.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) a smaller voltage (c) no voltage (d) a bigger voltage
15. 15.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
16. 16.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 4 of the switches are OFF and the rest are ON. How many bulbs glow?
17. 17.Which of these mainly gives out heat? (a) an electric iron (b) an electric drill (c) a buzzer (d) an LED lamp
18. 18.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
19. 19.🔘 Which kind of switch closes near a magnet? (a) a push button (b) a tilt switch (c) a reed switch (d) a slide switch
20. 20.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
21. 21.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) to make them heavy (c) plastic is an insulator (d) plastic is a conductor
22. 22.True or false: a plain rectangle is the symbol for a battery. (a) False (b) True
23. 23.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) the longer line (d) neither line
24. 24.Which of these mainly gives out light? (a) a siren (b) a buzzer (c) a street light (d) an exhaust fan
25. 25.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
26. 26.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
27. 27.🔘 A bulb and a cell are joined through 4 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
28. 28.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) Yes (b) No
29. 29.Which of these is a conductor? (a) a dry cork (b) a plastic ruler (c) a wooden stick (d) a graphite rod
30. 30.What does a tilt switch do? (a) works only while pressed (b) closes when tipped over (c) springs back when let go (d) slides side to side
31. 31.True or false: “a single current path” is true of a series circuit. (a) True (b) False
32. 32.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is OFF, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
33. 33.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
34. 34.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) battery (b) ammeter (c) wire (d) capacitor
35. 35.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
36. 36.💡 In a series circuit, how many paths does the current have? (a) none (b) one (c) two (d) one for each bulb
37. 37.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
38. 38.Which of these uses electricity? (a) a solar panel (b) a wind turbine (c) a refrigerator (d) a power station
39. 39.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a metal paper clip. Does the bulb glow? (a) No (b) Yes
40. 40.💡 4 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?

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