Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 272 · 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.🔋 A 3 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
2. 2.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) no voltage (c) half the voltage (d) the same voltage
3. 3.🔘 What does a switch do in a circuit? (a) makes electricity (b) changes the voltage (c) stores current (d) opens or closes the loop
4. 4.💡 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) dimmer (c) the same
5. 5.Which of these mainly gives out light? (a) a rice cooker (b) a doorbell (c) a torch (d) a room heater
6. 6.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
7. 7.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) to make bulbs dim (d) so all go off together
8. 8.🔋 A 12 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
9. 9.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
10. 10.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
11. 11.🔍 Which is the odd one out? (a) stop if a part gets hot (b) poke things in a socket (c) touch a switch when wet (d) fly a kite near wires
12. 12.💡 A battery lights 4 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
13. 13.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is ON. Does the bulb glow? (a) No (b) Yes
14. 14.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the shorter line (c) the longer line (d) both lines
15. 15.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
16. 16.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
17. 17.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is a conductor (c) to make them heavy (d) plastic is an insulator
18. 18.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
19. 19.💡 6 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
20. 20.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) LED (b) battery (c) diode (d) voltmeter
21. 21.🔍 Which is the odd one out? (a) fly a kite near wires (b) take cells out after use (c) fly kites in open fields (d) stay away from pylons
22. 22.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
23. 23.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
24. 24.🔋 How many 1.5 V cells must be joined in series to give 7.5 V?
25. 25.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 5 of the switches are OFF and the rest are ON. How many bulbs glow?
26. 26.Which drawing is the symbol for a cell? (a) a circle with A inside (b) one tall, one short bar (c) two or more cell symbols (d) a straight line
27. 27.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
28. 28.True or false: to poke things in a socket is not safe. (a) True (b) False
29. 29.Which of these is not safe? (a) climb an electric pole (b) keep drinks far away (c) fly kites in open fields (d) build with an adult near
30. 30.⚡ What does a street light mainly change electricity into? (a) sound (b) heat (c) movement (d) light
31. 31.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
32. 32.Which of these is an insulator? (a) a plastic ruler (b) a brass key (c) a safety pin (d) a steel spoon
33. 33.🔌 Is a cotton thread a conductor or an insulator? (a) an insulator (b) a conductor
34. 34.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
35. 35.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
36. 36.🔍 Which is the odd one out? (a) a tube light (b) an LED lamp (c) a torch (d) a school bell
37. 37.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) Yes (b) No
38. 38.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a mains extension board (c) an inverter socket (d) a small battery pack
39. 39.🔍 Which is the odd one out? (a) open a phone charger (b) poke things in a socket (c) build with an adult near (d) climb an electric pole
40. 40.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True

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