Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 160 · 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.💡 A battery lights 3 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
2. 2.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) an open circuit (c) a full circuit (d) a closed circuit
3. 3.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) No (b) Yes
4. 4.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
5. 5.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) many paths for current (c) a single current path (d) a break stops every bulb
6. 6.🔋 Does a wind turbine give electricity or use electricity? (a) gives electricity (b) uses electricity
7. 7.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
8. 8.💡 5 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
9. 9.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) a younger child (c) a stranger online (d) nobody
10. 10.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic makes current (c) plastic is a conductor (d) plastic is an insulator
11. 11.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
12. 12.💡 3 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?
13. 13.True or false: a push button works only while pressed. (a) False (b) True
14. 14.🔘 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 OFF. Does the bulb glow? (a) Yes (b) No
15. 15.True or false: to touch a fallen wire is not safe. (a) False (b) True
16. 16.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) No (b) Yes
17. 17.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
18. 18.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) both lines (c) the shorter line (d) neither line
19. 19.True or false: a toggle switch stays where you flip it. (a) True (b) False
20. 20.True or false: one tall, one short bar is the symbol for a cell. (a) False (b) True
21. 21.Which of these is an insulator? (a) an iron nail (b) aluminium foil (c) a safety pin (d) a plastic straw
22. 22.🔘 Which kind of switch works only while pressed? (a) a reed switch (b) a slide switch (c) a tilt switch (d) a push button
23. 23.Which of these mainly gives out light? (a) a siren (b) a ceiling fan (c) a doorbell (d) a traffic signal
24. 24.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
25. 25.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) junction (b) switch (c) voltmeter (d) LED
26. 26.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
27. 27.True or false: a dot where wires meet is the symbol for a junction. (a) True (b) False
28. 28.🔘 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) No (b) Yes
29. 29.🔋 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)? =
30. 30.🔦 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 cotton thread. Does the bulb glow? (a) No (b) Yes
31. 31.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
32. 32.Which of these mainly gives out heat? (a) a night lamp (b) a tube light (c) a street light (d) a rice cooker
33. 33.🔍 Which is the odd one out? (a) a steel spoon (b) an iron nail (c) a graphite rod (d) a wooden stick
34. 34.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
35. 35.🔘 Two switches are in series. When does the bulb glow? (a) when both are ON (b) when either is ON (c) never (d) when both are OFF
36. 36.🔋 7 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)? =
37. 37.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water carries current (c) it spoils the paint (d) water makes it cold
38. 38.💡 A battery lights 5 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
39. 39.🔘 Which kind of switch stays where you flip it? (a) a tilt switch (b) a reed switch (c) a slide switch (d) a toggle switch
40. 40.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open

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