Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 843 · 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.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) diode (b) motor (c) switch (d) capacitor
2. 2.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) resistor (b) bulb (c) switch (d) voltmeter
3. 3.True or false: a metal paper clip is a conductor. (a) True (b) False
4. 4.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) motor (b) switch (c) junction (d) resistor
5. 5.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
6. 6.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the filament (c) the switch (d) the base
7. 7.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) none (d) one
8. 8.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) neither line (d) the longer line
9. 9.🔋 Does a washing machine give electricity or use electricity? (a) gives electricity (b) uses electricity
10. 10.⚡ What does a water heater mainly change electricity into? (a) sound (b) movement (c) heat (d) light
11. 11.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
12. 12.🔍 Which is the odd one out? (a) a ceramic cup (b) an iron nail (c) a graphite rod (d) a copper wire
13. 13.True or false: a dry cork is an insulator. (a) False (b) True
14. 14.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
15. 15.Which of these gives us electricity? (a) a mobile phone (b) an air conditioner (c) a computer (d) a bicycle dynamo
16. 16.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
17. 17.True or false: a rubber eraser is a conductor. (a) False (b) True
18. 18.Which of these mainly gives out light? (a) an electric iron (b) an electric toy car (c) a mixer grinder (d) a street light
19. 19.🔦 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) Yes (b) No
20. 20.⚡ What does an electric iron mainly change electricity into? (a) heat (b) light (c) sound (d) movement
21. 21.🔘 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
22. 22.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) little stars (c) straight lines (d) dotted circles
23. 23.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) voltmeter (b) resistor (c) bulb (d) cell
24. 24.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) to save copper only (d) each gets full voltage
25. 25.🔋 Does a computer give electricity or use electricity? (a) gives electricity (b) uses electricity
26. 26.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 230 V (c) 1.5 V (d) 0.5 V
27. 27.🔦 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
28. 28.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) an open circuit (c) a series circuit (d) a full circuit
29. 29.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) no voltage (c) a bigger voltage (d) a smaller voltage
30. 30.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a push button (c) a slide switch (d) a tilt switch
31. 31.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
32. 32.True or false: a copper wire is an insulator. (a) True (b) False
33. 33.💡 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?
34. 34.Which of these is safe? (a) fly a kite near wires (b) use small battery cells (c) climb an electric pole (d) touch a fallen wire
35. 35.Which of these is safe? (a) open a phone charger (b) fly kites in open fields (c) throw cells in a fire (d) touch a fallen wire
36. 36.Which of these mainly makes sound? (a) an electric toy car (b) a school bell (c) a toaster (d) a ceiling fan
37. 37.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a cotton thread. Does the bulb glow? (a) No (b) Yes
38. 38.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) symbols are heavier (c) quick and clear for all (d) to make it colourful
39. 39.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
40. 40.🔍 Which is the odd one out? (a) stay away from pylons (b) fly kites in open fields (c) build with an adult near (d) poke things in a socket

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