Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 851 · 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.💡 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 3 glow? (a) No (b) Yes
2. 2.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) own switch for each bulb (c) bulbs share the voltage (d) a single current path
3. 3.True or false: an LED lamp mainly makes movement. (a) False (b) True
4. 4.Which of these means the circuit is closed? (a) a cell is taken out (b) the bulb is unscrewed (c) all wires are joined (d) the switch is OFF
5. 5.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a tilt switch (c) a reed switch (d) a push button
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) Yes (b) No
7. 7.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) symbols are heavier (c) to make it colourful (d) to hide the circuit
8. 8.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
9. 9.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
10. 10.⚡ What does a doorbell mainly change electricity into? (a) heat (b) sound (c) light (d) movement
11. 11.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
12. 12.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) it does not matter (c) none (d) both of them
13. 13.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) both lines (c) the shorter line (d) the longer line
14. 14.💡 4 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?
15. 15.🔋 Does a television give electricity or use electricity? (a) uses electricity (b) gives electricity
16. 16.🔍 Which is the odd one out? (a) poke things in a socket (b) keep drinks far away (c) take cells out after use (d) fly kites in open fields
17. 17.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) two (d) one
18. 18.💡 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) dimmer (c) the same
19. 19.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
20. 20.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) Yes (b) No
21. 21.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) one bulb out, all go out (d) each gets the full volts
22. 22.True or false: a reed switch works only while pressed. (a) True (b) False
23. 23.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
24. 24.True or false: a toggle switch stays where you flip it. (a) False (b) True
25. 25.🔦 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 safety pin. Does the bulb glow? (a) Yes (b) No
26. 26.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
27. 27.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) junction (b) battery (c) diode (d) capacitor
28. 28.🔍 Which is the odd one out? (a) a table fan (b) a ceiling fan (c) a school bell (d) an electric drill
29. 29.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they get dimmer (c) they all go out (d) they explode
30. 30.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
31. 31.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) a closed circuit (c) an open circuit (d) a series circuit
32. 32.🔋 3 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)? =
33. 33.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
34. 34.Which of these is not safe? (a) fly a kite near wires (b) fly kites in open fields (c) use small battery cells (d) build with an adult near
35. 35.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
36. 36.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) little stars (c) straight lines (d) wavy lines
37. 37.🔘 Which kind of switch springs back when let go? (a) a toggle switch (b) a slide switch (c) a push button (d) a tilt switch
38. 38.💡 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
39. 39.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is OFF. Does the bulb glow? (a) Yes (b) No
40. 40.🔌 Is a plastic ruler a conductor or an insulator? (a) a conductor (b) an insulator

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