Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 986 · 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.True or false: a steel coin is a conductor. (a) True (b) False
2. 2.True or false: a slide switch slides side to side. (a) False (b) True
3. 3.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a copper wire. Does the bulb glow? (a) No (b) Yes
4. 4.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a small battery pack (c) a wall socket (d) a mains extension board
5. 5.💡 A battery lights 4 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.🔘 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 ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
7. 7.🔦 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) Yes (b) No
8. 8.Which of these is safe? (a) open a phone charger (b) take cells out after use (c) touch a fallen wire (d) throw cells in a fire
9. 9.Which of these mainly gives out heat? (a) an electric toy car (b) a table fan (c) a torch (d) a toaster
10. 10.🔘 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 ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
11. 11.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) none (d) one
12. 12.💡 A battery lights 5 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
13. 13.True or false: one tall, one short bar is the symbol for an ammeter. (a) False (b) True
14. 14.Which of these gives us electricity? (a) a solar panel (b) a water pump (c) a television (d) a computer
15. 15.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) Yes (b) No
16. 16.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) the shorter line (d) neither line
17. 17.Which of these is true of a series circuit? (a) each gets the full volts (b) own switch for each bulb (c) a single current path (d) used in house wiring
18. 18.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
19. 19.🔍 Which is the odd one out? (a) a woollen thread (b) aluminium foil (c) a brass key (d) a safety pin
20. 20.Which of these gives us electricity? (a) a water pump (b) a cell (c) a television (d) a mobile phone
21. 21.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
22. 22.🔍 Which is the odd one out? (a) take cells out after use (b) fly kites in open fields (c) touch a fallen wire (d) use small battery cells
23. 23.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) in series (d) not joined
24. 24.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 0.5 V (c) 15 V (d) 1.5 V
25. 25.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) cell (b) LED (c) motor (d) resistor
26. 26.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
27. 27.Which of these mainly gives out light? (a) an LED lamp (b) an electric toy car (c) a siren (d) a rice cooker
28. 28.🔋 2 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
29. 29.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
30. 30.💡 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. How many bulbs glow?
31. 31.True or false: a school bell mainly makes movement. (a) False (b) True
32. 32.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) ammeter (b) battery (c) bulb (d) diode
33. 33.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
34. 34.🔦 A circuit has a used-up (dead) 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 glass marble. Does the bulb glow? (a) Yes (b) No
35. 35.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) never (c) when either is ON (d) only when both are OFF
36. 36.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) an open circuit (c) a closed circuit (d) a full circuit
37. 37.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a wooden stick. Does the bulb glow? (a) Yes (b) No
38. 38.What does a toggle switch do? (a) springs back when let go (b) closes when tipped over (c) works only while pressed (d) flips up or down
39. 39.🔍 Which is the odd one out? (a) a loudspeaker (b) an electric kettle (c) an electric iron (d) a rice cooker
40. 40.True or false: a street light mainly gives out heat. (a) False (b) True

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