Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 951 · 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.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) the same voltage (c) a bigger voltage (d) no voltage
2. 2.💡 2 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 1 glow? (a) No (b) Yes
3. 3.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
4. 4.🔍 Which is the odd one out? (a) a copper wire (b) a rubber band (c) an iron nail (d) a graphite rod
5. 5.True or false: if all wires are joined, the circuit is closed and current flows. (a) True (b) False
6. 6.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
7. 7.True or false: to fly a kite near wires is safe. (a) False (b) True
8. 8.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic makes current (d) plastic is an insulator
9. 9.Which drawing is the symbol for a resistor? (a) a circle with V inside (b) a plain rectangle (c) one tall, one short bar (d) triangle, bar and arrows
10. 10.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) when either is ON (c) only when both are ON (d) only when both are OFF
11. 11.True or false: to poke things in a socket is not safe. (a) False (b) True
12. 12.True or false: to touch a switch when wet is not safe. (a) True (b) False
13. 13.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) wire (b) bulb (c) junction (d) battery
14. 14.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) bulbs share the voltage (d) many paths for current
15. 15.💡 5 identical bulbs are joined in series with a 12.5 V battery (ideal wires). How many volts does each bulb get? =
16. 16.🔋 How many 2 V cells must be joined in series to give 16 V?
17. 17.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
18. 18.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) True (b) False
19. 19.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) No (b) Yes
20. 20.Which drawing is the symbol for a motor? (a) a circle with an X in it (b) two or more cell symbols (c) a plain rectangle (d) a circle with M inside
21. 21.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) to make bulbs dim (d) each gets full voltage
22. 22.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 5 of the switches are OFF and the rest are ON. How many bulbs glow?
23. 23.Which of these is an insulator? (a) a wooden stick (b) a copper wire (c) aluminium foil (d) a safety pin
24. 24.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
25. 25.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) none (c) it does not matter (d) both of them
26. 26.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
27. 27.True or false: a toaster mainly makes movement. (a) True (b) False
28. 28.True or false: a push button closes when tipped over. (a) False (b) True
29. 29.True or false: a reed switch closes when tipped over. (a) False (b) True
30. 30.True or false: a street light mainly gives out light. (a) False (b) True
31. 31.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
32. 32.True or false: a cotton thread is an insulator. (a) False (b) True
33. 33.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
34. 34.True or false: a toaster mainly makes sound. (a) False (b) True
35. 35.Which of these uses electricity? (a) a solar panel (b) a battery (c) a water pump (d) a cell
36. 36.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
37. 37.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
38. 38.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
39. 39.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
40. 40.💡 2 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. Bulb 2 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes

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