Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 386 · 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 drawing is the symbol for a junction? (a) a small empty box (b) many long-short pairs (c) a dot where wires meet (d) triangle, bar and arrows
2. 2.🔦 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 steel spoon. Does the bulb glow? (a) Yes (b) No
3. 3.True or false: a steel spoon is an insulator. (a) False (b) True
4. 4.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
5. 5.🔘 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 OFF, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
6. 6.🔋 Does a washing machine give electricity or use electricity? (a) gives electricity (b) uses electricity
7. 7.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
8. 8.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
9. 9.💡 5 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
10. 10.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) to save copper only (d) each gets full voltage
11. 11.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) a steel coin (b) a steel spoon (c) a brass key (d) a woollen thread
13. 13.🔋 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)? =
14. 14.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) wavy lines (c) dotted circles (d) straight lines
15. 15.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
16. 16.True or false: to take cells out after use is safe. (a) True (b) False
17. 17.True or false: to build with an adult near is not safe. (a) False (b) True
18. 18.True or false: a ceiling fan mainly makes movement. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) a graphite rod (b) a steel coin (c) a dry cork (d) a metal paper clip
20. 20.What does a toggle switch do? (a) flips up or down (b) closes when tipped over (c) springs back when let go (d) works only while pressed
21. 21.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
22. 22.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 4 of the switches are OFF and the rest are ON. How many bulbs glow?
23. 23.🔍 Which is the odd one out? (a) use a cable with cuts (b) use small battery cells (c) keep drinks far away (d) build with an adult near
24. 24.🔍 Which is the odd one out? (a) touch a switch when wet (b) build with an adult near (c) touch a fallen wire (d) fly a kite near wires
25. 25.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
26. 26.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
27. 27.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
28. 28.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
29. 29.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) Yes (b) No
30. 30.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) No (b) Yes
31. 31.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) wire (b) diode (c) LED (d) voltmeter
32. 32.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) motor (b) battery (c) capacitor (d) switch
33. 33.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
34. 34.True or false: a doorbell mainly makes sound. (a) True (b) False
35. 35.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
36. 36.⚡ A solar panel changes which kind of energy into electricity? (a) chemical energy (b) sound energy (c) light energy (d) wind energy
37. 37.🔋 2 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)? =
38. 38.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
39. 39.🔘 What does a switch do in a circuit? (a) stores current (b) makes electricity (c) opens or closes the loop (d) changes the voltage
40. 40.🔘 Which kind of switch stays where you flip it? (a) a reed switch (b) a tilt switch (c) a toggle switch (d) a slide switch

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