Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 605 · 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.🔋 What is a battery? (a) a switch with a lid (b) two or more cells joined (c) a kind of bulb (d) one single wire
2. 2.⚡ What does a mixer grinder mainly change electricity into? (a) heat (b) sound (c) movement (d) light
3. 3.🔌 Is a ceramic cup a conductor or an insulator? (a) a conductor (b) an insulator
4. 4.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
5. 5.True or false: a circle with a cross is the symbol for an LED. (a) False (b) True
6. 6.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) symbols are heavier (c) to hide the circuit (d) to make it colourful
7. 7.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. How many bulbs glow?
8. 8.🔋 How many 1.5 V cells must be joined in series to give 7.5 V?
9. 9.⚡ What does a tube light mainly change electricity into? (a) light (b) sound (c) movement (d) heat
10. 10.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) No (b) Yes
11. 11.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) sound energy (c) chemical energy (d) movement energy
12. 12.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
13. 13.🔦 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 wooden stick. Does the bulb glow? (a) Yes (b) No
14. 14.True or false: an exhaust fan mainly gives out light. (a) False (b) True
15. 15.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
16. 16.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
17. 17.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) Yes (b) No
18. 18.🔘 Which kind of switch closes near a magnet? (a) a toggle switch (b) a push button (c) a slide switch (d) a reed switch
19. 19.⚠️ Who should be with you when you build a circuit? (a) a younger child (b) a stranger online (c) nobody (d) a trusted adult
20. 20.What does a toggle switch do? (a) closes near a magnet (b) works only while pressed (c) springs back when let go (d) flips up or down
21. 21.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) No (b) Yes
22. 22.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
23. 23.True or false: to dry your hands first is safe. (a) True (b) False
24. 24.True or false: a push button closes near a magnet. (a) True (b) False
25. 25.True or false: an LED lamp mainly gives out heat. (a) True (b) False
26. 26.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) each gets the full volts (d) a single current path
27. 27.Which of these mainly makes movement? (a) a traffic signal (b) a mixer grinder (c) a school bell (d) a siren
28. 28.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
29. 29.Which of these is not safe? (a) take cells out after use (b) keep drinks far away (c) touch a fallen wire (d) stay away from pylons
30. 30.🔦 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 steel spoon. Does the bulb glow? (a) No (b) Yes
31. 31.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a long wire (c) a bulb (d) a fuse or MCB
32. 32.True or false: an electric iron mainly makes sound. (a) False (b) True
33. 33.Which drawing is the symbol for a bulb? (a) two or more cell symbols (b) triangle against a bar (c) triangle, bar and arrows (d) a circle with an X in it
34. 34.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
35. 35.🔦 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 rubber eraser. Does the bulb glow? (a) No (b) Yes
36. 36.True or false: to stop if a part gets hot is safe. (a) True (b) False
37. 37.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a push button (c) a reed switch (d) a tilt switch
38. 38.💡 5 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
39. 39.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
40. 40.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True

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