Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 440 · 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: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
2. 2.Which of these is true of a parallel circuit? (a) used in house wiring (b) a break stops every bulb (c) one bulb out, all go out (d) a single current path
3. 3.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
4. 4.True or false: a table fan mainly makes movement. (a) False (b) True
5. 5.🔘 A bulb and a cell are joined through 3 switches on 3 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
6. 6.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
7. 7.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a series circuit (c) an open circuit (d) a full circuit
8. 8.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) ammeter (b) cell (c) capacitor (d) resistor
9. 9.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
10. 10.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is ON, C is ON and D is OFF. Does the bulb glow? (a) No (b) Yes
11. 11.🔦 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 copper wire. Does the bulb glow? (a) No (b) Yes
12. 12.True or false: a toggle switch closes when tipped over. (a) True (b) False
13. 13.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) each gets the full volts (d) a break stops every bulb
14. 14.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is ON, B is ON, C is ON and D is ON. Does the bulb glow? (a) Yes (b) No
15. 15.Which of these mainly gives out heat? (a) an electric iron (b) a tube light (c) a ceiling fan (d) a doorbell
16. 16.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
17. 17.🔋 4 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
18. 18.True or false: “a single current path” is true of a series circuit. (a) False (b) True
19. 19.True or false: an LED lamp mainly gives out heat. (a) True (b) False
20. 20.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
21. 21.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) diode (b) cell (c) bulb (d) junction
22. 22.🔍 Which is the odd one out? (a) fly kites in open fields (b) throw cells in a fire (c) stay away from pylons (d) use small battery cells
23. 23.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
24. 24.🔘 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 OFF and C is ON. Does the bulb glow? (a) No (b) Yes
25. 25.🔘 Which kind of switch closes near a magnet? (a) a toggle switch (b) a push button (c) a tilt switch (d) a reed switch
26. 26.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
27. 27.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) No (b) Yes
28. 28.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
29. 29.💡 3 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
30. 30.🔋 Does a bicycle dynamo give electricity or use electricity? (a) uses electricity (b) gives electricity
31. 31.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) sound energy (c) chemical energy (d) movement energy
32. 32.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
33. 33.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) one (d) two
34. 34.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
35. 35.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) battery (b) ammeter (c) motor (d) capacitor
36. 36.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
37. 37.True or false: a safety pin is an insulator. (a) True (b) False
38. 38.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
39. 39.True or false: to keep drinks far away is not safe. (a) True (b) False
40. 40.🔦 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

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