Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 381 · 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 is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) each gets the full volts (d) a break stops every bulb
2. 2.What does a slide switch do? (a) flips up or down (b) slides side to side (c) springs back when let go (d) closes when tipped over
3. 3.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) an insulator (c) a cell (d) a switch that is ON
4. 4.⚡ A solar panel changes which kind of energy into electricity? (a) wind energy (b) chemical energy (c) sound energy (d) light energy
5. 5.🔋 What should you do with used-up cells? (a) bury them in soil (b) throw them in a fire (c) cut them open (d) give them for recycling
6. 6.Which of these is not safe? (a) stay away from pylons (b) use small battery cells (c) touch a switch when wet (d) build with an adult near
7. 7.🔍 Which is the odd one out? (a) use a cable with cuts (b) stay away from pylons (c) throw cells in a fire (d) climb an electric pole
8. 8.🔦 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 cotton thread. Does the bulb glow? (a) No (b) Yes
9. 9.💡 A battery lights 3 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
10. 10.Which of these uses electricity? (a) a bicycle dynamo (b) a computer (c) a wind turbine (d) a battery
11. 11.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) one (c) two (d) none
12. 12.💡 A battery lights 4 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
13. 13.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
14. 14.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
15. 15.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a bigger voltage (c) a smaller voltage (d) the same voltage
16. 16.🔋 6 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
17. 17.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
18. 18.Which of these is safe? (a) climb an electric pole (b) use mains for a project (c) open a phone charger (d) build with an adult near
19. 19.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
20. 20.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
21. 21.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) little stars (c) dotted circles (d) wavy lines
22. 22.Which of these is true of a series circuit? (a) one bulb out, all go out (b) each gets the full volts (c) many paths for current (d) used in house wiring
23. 23.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
24. 24.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in series (c) in parallel (d) by Wi-Fi
25. 25.Which of these means the circuit is open? (a) a cell is taken out (b) all wires are joined (c) the loop is complete (d) the switch is ON
26. 26.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) cell (b) bulb (c) LED (d) battery
27. 27.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) to make them heavy (c) plastic is a conductor (d) plastic makes current
28. 28.💡 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
29. 29.🔘 Which kind of switch closes near a magnet? (a) a slide switch (b) a toggle switch (c) a push button (d) a reed switch
30. 30.Which of these mainly gives out heat? (a) a doorbell (b) an electric iron (c) a siren (d) a tube light
31. 31.🔘 Which kind of switch closes when tipped over? (a) a reed switch (b) a toggle switch (c) a push button (d) a tilt switch
32. 32.Which of these mainly makes movement? (a) an electric toy car (b) an LED lamp (c) a torch (d) a tube light
33. 33.True or false: a rubber eraser is an insulator. (a) False (b) True
34. 34.Which of these mainly makes sound? (a) a loudspeaker (b) a toaster (c) a street light (d) an LED lamp
35. 35.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) a closed circuit (c) an open circuit (d) a full circuit
36. 36.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
37. 37.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
38. 38.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
39. 39.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
40. 40.🔍 Which is the odd one out? (a) touch a switch when wet (b) climb an electric pole (c) take cells out after use (d) open a phone charger

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