Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 227 · 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) a break stops every bulb (b) each gets the full volts (c) one bulb out, all go out (d) bulbs share the voltage
2. 2.True or false: a loudspeaker mainly gives out light. (a) False (b) True
3. 3.What does a push button do? (a) stays where you flip it (b) works only while pressed (c) flips up or down (d) slides side to side
4. 4.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) half the voltage (c) the same voltage (d) double the voltage
5. 5.🔘 Which kind of switch closes when tipped over? (a) a push button (b) a reed switch (c) a tilt switch (d) a toggle switch
6. 6.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
7. 7.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
8. 8.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) a wire is cut (d) the switch is ON
9. 9.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
10. 10.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
11. 11.🔘 When a switch is ON, the circuit is … (a) open (b) broken (c) cut (d) closed
12. 12.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they all go out (c) they get dimmer (d) they keep glowing
13. 13.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
14. 14.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) Yes (b) No
15. 15.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
16. 16.True or false: to fly kites in open fields is safe. (a) True (b) False
17. 17.⚡ What does a buzzer mainly change electricity into? (a) movement (b) heat (c) sound (d) light
18. 18.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) motor (b) bulb (c) junction (d) switch
19. 19.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
20. 20.True or false: to build with an adult near is safe. (a) True (b) False
21. 21.🔋 Does a refrigerator give electricity or use electricity? (a) uses electricity (b) gives electricity
22. 22.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
23. 23.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the longer line (c) the shorter line (d) both lines
24. 24.🔍 Which is the odd one out? (a) a rubber eraser (b) a ceramic cup (c) a cotton thread (d) a steel spoon
25. 25.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
26. 26.🔋 What is a battery? (a) a kind of bulb (b) a switch with a lid (c) two or more cells joined (d) one single wire
27. 27.Which of these is not safe? (a) touch a switch when wet (b) stop if a part gets hot (c) fly kites in open fields (d) take cells out after use
28. 28.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
29. 29.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) light energy (c) movement energy (d) sound energy
30. 30.Which drawing is the symbol for a battery? (a) a long and a short line (b) a dot where wires meet (c) a straight line (d) two or more cell symbols
31. 31.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the base (c) the switch (d) the filament
32. 32.💡 A battery lights 2 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
33. 33.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
34. 34.Which of these is true of a series circuit? (a) used in house wiring (b) a single current path (c) one out, the rest glow (d) each gets the full volts
35. 35.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
36. 36.🔋 How many 1.5 V cells must be joined in series to give 6 V?
37. 37.Which of these is true of a series circuit? (a) one out, the rest glow (b) one bulb out, all go out (c) many paths for current (d) used in house wiring
38. 38.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
39. 39.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) symbols are heavier (c) quick and clear for all (d) to make it colourful
40. 40.🔋 5 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)? =

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