Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 660 · 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.True or false: a torch mainly gives out light. (a) True (b) False
2. 2.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
3. 3.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
4. 4.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) No (b) Yes
5. 5.🔘 What does a switch do in a circuit? (a) makes electricity (b) stores current (c) changes the voltage (d) opens or closes the loop
6. 6.🔍 Which is the odd one out? (a) a traffic signal (b) an exhaust fan (c) a torch (d) a night lamp
7. 7.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) wind energy (c) electrical energy (d) nuclear energy
8. 8.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
9. 9.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
10. 10.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
11. 11.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
12. 12.✏️ 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
13. 13.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) by Wi-Fi (c) in parallel (d) not joined
14. 14.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they get dimmer (d) they all go out
15. 15.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
16. 16.🔍 Which is the odd one out? (a) a plastic ruler (b) a woollen thread (c) a rubber eraser (d) a steel coin
17. 17.💡 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. Does bulb 1 glow? (a) Yes (b) No
18. 18.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
19. 19.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
20. 20.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
21. 21.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is ON, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
22. 22.True or false: to open a phone charger is safe. (a) True (b) False
23. 23.Which of these mainly gives out light? (a) a siren (b) a water heater (c) a traffic signal (d) a table fan
24. 24.What does a tilt switch do? (a) flips up or down (b) closes near a magnet (c) stays where you flip it (d) closes when tipped over
25. 25.🔋 How many 1.5 V cells must be joined in series to give 12 V?
26. 26.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
27. 27.True or false: a glass marble is an insulator. (a) False (b) True
28. 28.⚡ What does an electric toy car mainly change electricity into? (a) light (b) movement (c) heat (d) sound
29. 29.True or false: two equal parallel lines is the symbol for a resistor. (a) True (b) False
30. 30.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
31. 31.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a small battery pack (c) a wall socket (d) an inverter socket
32. 32.🔦 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) Yes (b) No
33. 33.🔍 Which is the odd one out? (a) a street light (b) an electric toy car (c) a traffic signal (d) a night lamp
34. 34.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
35. 35.What does a slide switch do? (a) stays where you flip it (b) flips up or down (c) works only while pressed (d) slides side to side
36. 36.True or false: a paper strip is an insulator. (a) False (b) True
37. 37.Which of these mainly gives out heat? (a) a buzzer (b) a street light (c) a mixer grinder (d) a toaster
38. 38.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
39. 39.Which of these gives us electricity? (a) an air conditioner (b) a refrigerator (c) a television (d) a cell
40. 40.True or false: to throw cells in a fire is not safe. (a) True (b) False

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