Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 829 · 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 is the odd one out? (a) build with an adult near (b) keep drinks far away (c) take cells out after use (d) climb an electric pole
2. 2.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a younger child (c) a trusted adult (d) a stranger online
3. 3.What does a push button do? (a) flips up or down (b) slides side to side (c) springs back when let go (d) closes near a magnet
4. 4.🔘 Which kind of switch springs back when let go? (a) a toggle switch (b) a reed switch (c) a push button (d) a tilt switch
5. 5.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 12 V (c) 9 V (d) 230 V
6. 6.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) No (b) Yes
7. 7.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) chemical energy (c) sound energy (d) movement energy
8. 8.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is ON, B is ON, C is ON and D is ON. Does the bulb glow? (a) Yes (b) No
9. 9.💡 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. All the bulbs are in place. How many bulbs glow?
10. 10.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
11. 11.Which of these uses electricity? (a) a battery (b) a generator (c) a solar panel (d) a television
12. 12.True or false: many long-short pairs is the symbol for a diode. (a) False (b) True
13. 13.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
14. 14.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a small battery pack (c) a mains extension board (d) a wall socket
15. 15.Which of these is true of a series circuit? (a) many paths for current (b) bulbs share the voltage (c) own switch for each bulb (d) one out, the rest glow
16. 16.True or false: to dry your hands first is not safe. (a) True (b) False
17. 17.True or false: a loudspeaker mainly makes sound. (a) True (b) False
18. 18.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
19. 19.Which of these is true of a series circuit? (a) one bulb out, all go out (b) one out, the rest glow (c) many paths for current (d) used in house wiring
20. 20.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) little stars (c) straight lines (d) wavy lines
21. 21.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) quick and clear for all (c) to hide the circuit (d) symbols are heavier
22. 22.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) when either is ON (b) only when both are ON (c) never (d) only when both are OFF
23. 23.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) only one (c) both of them (d) it does not matter
24. 24.🔋 How many 1.5 V cells must be joined in series to give 12 V?
25. 25.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
26. 26.True or false: to stay away from pylons is safe. (a) False (b) True
27. 27.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
28. 28.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
29. 29.True or false: to stay away from pylons is not safe. (a) True (b) False
30. 30.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
31. 31.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
32. 32.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
33. 33.⚠️ Is it safe to stay away from pylons? (a) safe (b) not safe
34. 34.🔘 A bulb and a cell are joined through 4 switches on 4 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
35. 35.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
36. 36.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the switch is ON (d) a wire has come loose
37. 37.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
38. 38.🔍 Which is the odd one out? (a) an electric drill (b) a torch (c) an LED lamp (d) a traffic signal
39. 39.🔋 What should you do with used-up cells? (a) give them for recycling (b) bury them in soil (c) cut them open (d) throw them in a fire
40. 40.🔋 Does a refrigerator give electricity or use electricity? (a) uses electricity (b) gives electricity

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