Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 733 · 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.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they explode (d) they keep glowing
2. 2.🔍 Which is the odd one out? (a) an LED lamp (b) a table fan (c) an exhaust fan (d) a ceiling fan
3. 3.Which of these uses electricity? (a) a bicycle dynamo (b) a generator (c) a water pump (d) a power station
4. 4.Which of these is an insulator? (a) a brass key (b) a glass marble (c) aluminium foil (d) a steel spoon
5. 5.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) Yes (b) No
6. 6.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a reed switch (c) a push button (d) a toggle switch
7. 7.Which of these means the circuit is closed? (a) all wires are joined (b) a cell is taken out (c) a wire has come loose (d) the bulb is unscrewed
8. 8.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to make bulbs dim (c) so all go off together (d) to save copper only
9. 9.Which drawing is the symbol for a junction? (a) one tall, one short bar (b) a straight line (c) a small empty box (d) a dot where wires meet
10. 10.🔘 When a switch is ON, the circuit is … (a) open (b) broken (c) cut (d) closed
11. 11.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
12. 12.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in series (c) by Wi-Fi (d) in parallel
13. 13.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
14. 14.What does a push button do? (a) flips up or down (b) closes near a magnet (c) works only while pressed (d) closes when tipped over
15. 15.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
16. 16.🔍 Which is the odd one out? (a) a steel coin (b) a plastic straw (c) a graphite rod (d) a copper wire
17. 17.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a switch that is ON (c) an insulator (d) a conductor
18. 18.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) water drops (c) photons (d) electrons
19. 19.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
20. 20.🔍 Which is the odd one out? (a) an electric iron (b) an electric toy car (c) a ceiling fan (d) an exhaust fan
21. 21.🔘 Which kind of switch springs back when let go? (a) a reed switch (b) a toggle switch (c) a slide switch (d) a push button
22. 22.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) both lines (c) the shorter line (d) neither line
23. 23.Which of these means the circuit is open? (a) a wire is cut (b) all wires are joined (c) the loop is complete (d) the switch is ON
24. 24.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
25. 25.Which of these is safe? (a) use mains for a project (b) fly kites in open fields (c) use a cable with cuts (d) throw cells in a fire
26. 26.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) a break stops every bulb (d) one out, the rest glow
27. 27.🔍 Which is the odd one out? (a) an electric kettle (b) a water heater (c) a doorbell (d) a room heater
28. 28.🔘 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) No (b) Yes
29. 29.True or false: if the loop is complete, the circuit is open and no current flows. (a) True (b) False
30. 30.🔘 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 ON and C is ON. Does the bulb glow? (a) No (b) Yes
31. 31.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
32. 32.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
33. 33.Which of these means the circuit is closed? (a) a cell is taken out (b) a wire has come loose (c) the loop is complete (d) a wire is cut
34. 34.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) False (b) True
35. 35.Which of these is an insulator? (a) an iron nail (b) a graphite rod (c) a brass key (d) a rubber band
36. 36.⚠️ Is it safe to stay away from pylons? (a) safe (b) not safe
37. 37.True or false: “a single current path” is true of a series circuit. (a) False (b) True
38. 38.True or false: to touch a switch when wet is not safe. (a) False (b) True
39. 39.True or false: a woollen thread is a conductor. (a) True (b) False
40. 40.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. How many bulbs glow?

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