Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 890 · 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, wires are usually drawn as … (a) little stars (b) dotted circles (c) straight lines (d) wavy lines
2. 2.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
3. 3.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
4. 4.🔦 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 plastic straw. Does the bulb glow? (a) Yes (b) No
5. 5.🔘 Which kind of switch springs back when let go? (a) a slide switch (b) a toggle switch (c) a tilt switch (d) a push button
6. 6.Which of these is safe? (a) touch a switch when wet (b) touch a fallen wire (c) dry your hands first (d) poke things in a socket
7. 7.🔍 Which is the odd one out? (a) use small battery cells (b) throw cells in a fire (c) take cells out after use (d) fly kites in open fields
8. 8.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
9. 9.💡 5 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
10. 10.Which of these is true of a series circuit? (a) bulbs share the voltage (b) one out, the rest glow (c) used in house wiring (d) many paths for current
11. 11.🔋 Does a water pump give electricity or use electricity? (a) gives electricity (b) uses electricity
12. 12.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) cell (b) diode (c) LED (d) bulb
13. 13.💡 6 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. Bulbs 2 and 3 are taken out of their holders. How many bulbs glow?
14. 14.⚡ A fan changes electrical energy mainly into which kind of energy? (a) movement energy (b) sound energy (c) light energy (d) chemical energy
15. 15.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
16. 16.Which drawing is the symbol for a resistor? (a) a line lifted at a gap (b) a straight line (c) a plain rectangle (d) triangle against a bar
17. 17.True or false: a room heater mainly makes sound. (a) False (b) True
18. 18.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is an insulator (c) plastic makes current (d) plastic is a conductor
19. 19.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) voltmeter (b) capacitor (c) cell (d) diode
20. 20.⚡ What does a room heater mainly change electricity into? (a) movement (b) heat (c) light (d) sound
21. 21.Which of these is not safe? (a) keep drinks far away (b) use mains for a project (c) use small battery cells (d) dry your hands first
22. 22.⚡ What does a buzzer mainly change electricity into? (a) heat (b) light (c) sound (d) movement
23. 23.🔋 Does a solar panel give electricity or use electricity? (a) gives electricity (b) uses electricity
24. 24.True or false: a toaster mainly gives out heat. (a) True (b) False
25. 25.🔦 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 an iron nail. Does the bulb glow? (a) Yes (b) No
26. 26.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
27. 27.🔍 Which is the odd one out? (a) touch a switch when wet (b) climb an electric pole (c) use a cable with cuts (d) use small battery cells
28. 28.🔋 A 6 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
29. 29.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
30. 30.True or false: to fly kites in open fields is not safe. (a) True (b) False
31. 31.True or false: to throw cells in a fire is not safe. (a) False (b) True
32. 32.💡 A battery lights 3 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
33. 33.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) no voltage (c) a smaller voltage (d) a bigger voltage
34. 34.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) it does not matter (c) both of them (d) only one
35. 35.🔌 Which metal is used for most electric wires at home? (a) rubber (b) glass (c) plastic (d) copper
36. 36.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
37. 37.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
38. 38.Which of these mainly gives out light? (a) a night lamp (b) a room heater (c) a table fan (d) a mixer grinder
39. 39.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
40. 40.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they explode (d) they keep glowing

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