Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 852 · 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 tiny particles drift along a metal wire to carry the current? (a) photons (b) water drops (c) dust particles (d) electrons
2. 2.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
3. 3.🔌 A gap of dry air between two wires acts as … (a) an insulator (b) a conductor (c) a switch that is ON (d) a cell
4. 4.🔍 Which is the odd one out? (a) a buzzer (b) a night lamp (c) a doorbell (d) a school bell
5. 5.💡 A battery lights 2 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
6. 6.🔦 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) Yes (b) No
7. 7.True or false: if the switch is OFF, the circuit is open and no current flows. (a) False (b) True
8. 8.True or false: a small empty box is the symbol for a resistor. (a) False (b) True
9. 9.🔘 Which kind of switch works only while pressed? (a) a tilt switch (b) a toggle switch (c) a push button (d) a slide switch
10. 10.⚡ What does an electric kettle mainly change electricity into? (a) movement (b) light (c) heat (d) sound
11. 11.🔘 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?
12. 12.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) to save copper only (d) each gets full voltage
13. 13.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) in series (d) not joined
14. 14.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
15. 15.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 1.5 V (c) 12 V (d) 230 V
16. 16.🔍 Which is the odd one out? (a) use small battery cells (b) build with an adult near (c) fly a kite near wires (d) dry your hands first
17. 17.True or false: to build with an adult near is safe. (a) False (b) True
18. 18.Which of these gives us electricity? (a) a cell (b) a computer (c) a refrigerator (d) a mobile phone
19. 19.🔁 What must there be for a current to flow? (a) a broken path (b) one loose end (c) a complete loop (d) a plastic gap
20. 20.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
21. 21.🔍 Which is the odd one out? (a) fly kites in open fields (b) climb an electric pole (c) use small battery cells (d) stay away from pylons
22. 22.True or false: a small empty box is the symbol for a capacitor. (a) False (b) True
23. 23.Which of these is a conductor? (a) a glass marble (b) a brass key (c) a plastic ruler (d) a plastic straw
24. 24.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 2 glow? (a) Yes (b) No
25. 25.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) one (c) two (d) none
26. 26.True or false: a circle with V inside is the symbol for a cell. (a) True (b) False
27. 27.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by aluminium foil. Does the bulb glow? (a) No (b) Yes
28. 28.Which of these is a conductor? (a) a cotton thread (b) a ceramic cup (c) a plastic straw (d) a steel spoon
29. 29.🔍 Which is the odd one out? (a) a siren (b) a doorbell (c) a loudspeaker (d) a tube light
30. 30.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
31. 31.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
32. 32.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) half the voltage (c) the same voltage (d) no voltage
33. 33.True or false: to open a phone charger is not safe. (a) False (b) True
34. 34.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
35. 35.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) both lines (d) the longer line
36. 36.True or false: if a cell is taken out, the circuit is closed and current flows. (a) True (b) False
37. 37.🔦 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 band. Does the bulb glow? (a) Yes (b) No
38. 38.True or false: a torch mainly makes sound. (a) False (b) True
39. 39.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
40. 40.🔦 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

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