Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 426 · 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.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
2. 2.Which of these is safe? (a) take cells out after use (b) throw cells in a fire (c) touch a fallen wire (d) climb an electric pole
3. 3.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) plastic is an insulator (c) to make them heavy (d) plastic makes current
4. 4.True or false: a toggle switch springs back when let go. (a) True (b) False
5. 5.🔋 Does a bicycle dynamo give electricity or use electricity? (a) uses electricity (b) gives electricity
6. 6.🔋 4 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
7. 7.💡 3 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
8. 8.True or false: a rubber band is an insulator. (a) True (b) False
9. 9.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) both lines (d) the longer line
10. 10.💡 4 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
11. 11.🔘 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 ON, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
12. 12.🔦 A circuit has a new 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 brass key. Does the bulb glow? (a) No (b) Yes
13. 13.🔍 Which is the odd one out? (a) a copper wire (b) a safety pin (c) a glass marble (d) an iron nail
14. 14.🔍 Which is the odd one out? (a) use mains for a project (b) build with an adult near (c) dry your hands first (d) stop if a part gets hot
15. 15.🔍 Which is the odd one out? (a) a steel spoon (b) a safety pin (c) a wooden stick (d) a steel coin
16. 16.True or false: a ceiling fan mainly gives out light. (a) True (b) False
17. 17.🔋 How many 1.5 V cells must be joined in series to give 3 V?
18. 18.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
19. 19.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
20. 20.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
21. 21.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) wire (b) resistor (c) voltmeter (d) bulb
22. 22.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) all wires are joined (d) a wire has come loose
23. 23.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
24. 24.💡 3 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
25. 25.🔋 A 3 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
26. 26.What does a tilt switch do? (a) closes when tipped over (b) closes near a magnet (c) springs back when let go (d) works only while pressed
27. 27.Which drawing is the symbol for a diode? (a) two or more cell symbols (b) a long and a short line (c) many long-short pairs (d) triangle against a bar
28. 28.Which drawing is the symbol for a cell? (a) a circle with a cross (b) many long-short pairs (c) a small empty box (d) one tall, one short bar
29. 29.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
30. 30.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
31. 31.💡 3 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 1 is taken out of its holder. How many bulbs glow?
32. 32.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to save copper only (c) so all go off together (d) to make bulbs dim
33. 33.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
34. 34.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a slide switch (c) a reed switch (d) a tilt switch
35. 35.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
36. 36.Which of these mainly makes sound? (a) an exhaust fan (b) a ceiling fan (c) a table fan (d) a doorbell
37. 37.Which of these is true of a series circuit? (a) a single current path (b) one out, the rest glow (c) many paths for current (d) own switch for each bulb
38. 38.💡 4 identical bulbs are joined in series with a 16 V battery (ideal wires). How many volts does each bulb get? =
39. 39.🔦 A circuit has a new 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
40. 40.Which of these is safe? (a) climb an electric pole (b) stop if a part gets hot (c) touch a switch when wet (d) fly a kite near wires

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