Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 734 · 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.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
2. 2.True or false: to build with an adult near is not safe. (a) False (b) True
3. 3.Which of these mainly makes movement? (a) a traffic signal (b) an electric drill (c) a rice cooker (d) a street light
4. 4.What does a reed switch do? (a) works only while pressed (b) closes when tipped over (c) flips up or down (d) closes near a magnet
5. 5.⚠️ Is it safe to climb an electric pole? (a) not safe (b) safe
6. 6.🔍 Which is the odd one out? (a) a paper strip (b) a brass key (c) a woollen thread (d) a rubber band
7. 7.💡 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
8. 8.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
9. 9.💡 3 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
10. 10.🔘 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 ON. Does the bulb glow? (a) Yes (b) No
11. 11.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
12. 12.🔋 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)? =
13. 13.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
14. 14.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) junction (b) motor (c) voltmeter (d) capacitor
15. 15.🔦 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
16. 16.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
17. 17.Which of these means the circuit is open? (a) all wires are joined (b) a cell is taken out (c) the switch is ON (d) the loop is complete
18. 18.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
19. 19.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
20. 20.Which of these is safe? (a) touch a switch when wet (b) fly a kite near wires (c) use small battery cells (d) climb an electric pole
21. 21.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) movement energy (c) sound energy (d) light energy
22. 22.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
23. 23.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
24. 24.⚡ What does an exhaust fan mainly change electricity into? (a) sound (b) light (c) heat (d) movement
25. 25.🔌 Which metal is used for most electric wires at home? (a) rubber (b) copper (c) plastic (d) glass
26. 26.💡 2 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 2 is taken out of its holder. How many bulbs glow?
27. 27.🔍 Which is the odd one out? (a) climb an electric pole (b) open a phone charger (c) use a cable with cuts (d) stop if a part gets hot
28. 28.True or false: to take cells out after use is safe. (a) True (b) False
29. 29.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
30. 30.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) Yes (b) No
31. 31.🔘 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 OFF, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
32. 32.🔦 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 metal paper clip. Does the bulb glow? (a) No (b) Yes
33. 33.What does a tilt switch do? (a) stays where you flip it (b) flips up or down (c) slides side to side (d) closes when tipped over
34. 34.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is ON, C is ON and D is ON. Does the bulb glow? (a) No (b) Yes
35. 35.🔍 Which is the odd one out? (a) a copper wire (b) a ceramic cup (c) a plastic ruler (d) a dry cork
36. 36.🔘 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 ON and C is ON. Does the bulb glow? (a) Yes (b) No
37. 37.🔋 What is a battery? (a) a switch with a lid (b) one single wire (c) two or more cells joined (d) a kind of bulb
38. 38.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
39. 39.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) diode (b) bulb (c) cell (d) voltmeter
40. 40.Which of these is true of a parallel circuit? (a) each gets the full volts (b) one bulb out, all go out (c) a break stops every bulb (d) a single current path

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