Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 388 · 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 of these mainly makes sound? (a) a street light (b) a water heater (c) a torch (d) a loudspeaker
2. 2.⚡ What does an LED lamp mainly change electricity into? (a) sound (b) light (c) heat (d) movement
3. 3.🔘 Which kind of switch slides side to side? (a) a toggle switch (b) a tilt switch (c) a slide switch (d) a push button
4. 4.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
5. 5.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
6. 6.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
7. 7.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) little stars (c) wavy lines (d) dotted circles
8. 8.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) it spoils the paint (c) water carries current (d) it is just untidy
9. 9.True or false: one tall, one short bar is the symbol for an ammeter. (a) True (b) False
10. 10.🔍 Which is the odd one out? (a) open a phone charger (b) fly kites in open fields (c) build with an adult near (d) keep drinks far away
11. 11.True or false: a safety pin is an insulator. (a) False (b) True
12. 12.True or false: a plain rectangle is the symbol for a battery. (a) True (b) False
13. 13.🔁 What must there be for a current to flow? (a) a plastic gap (b) one loose end (c) a broken path (d) a complete loop
14. 14.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) none (c) both of them (d) it does not matter
15. 15.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) one (d) two
16. 16.🔍 Which is the odd one out? (a) aluminium foil (b) a safety pin (c) a rubber band (d) a brass key
17. 17.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) dust particles (c) water drops (d) photons
18. 18.What does a slide switch do? (a) stays where you flip it (b) flips up or down (c) closes near a magnet (d) slides side to side
19. 19.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
20. 20.⚡ What does a school bell mainly change electricity into? (a) sound (b) light (c) heat (d) movement
21. 21.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
22. 22.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) shout for an adult (b) wait and watch (c) pull them by the hand (d) pour water on them
23. 23.🔌 Which metal is used for most electric wires at home? (a) rubber (b) glass (c) plastic (d) copper
24. 24.💡 2 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
25. 25.🔌 Is a dry cork a conductor or an insulator? (a) an insulator (b) a conductor
26. 26.💡 2 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
27. 27.🔘 A bulb and a cell are joined through 6 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
28. 28.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) neither line (c) both lines (d) the shorter line
29. 29.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
30. 30.🔍 Which is the odd one out? (a) a cotton thread (b) a brass key (c) a plastic straw (d) a dry cork
31. 31.💡 3 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. Bulb 2 is taken out of its holder. How many bulbs glow?
32. 32.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) junction (b) voltmeter (c) resistor (d) diode
33. 33.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
34. 34.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic makes current (d) plastic is an insulator
35. 35.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
36. 36.🔘 A bulb and a cell are joined through 3 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
37. 37.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) diode (b) capacitor (c) junction (d) battery
38. 38.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
39. 39.🔦 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 plastic ruler. Does the bulb glow? (a) No (b) Yes
40. 40.Which of these uses electricity? (a) a solar panel (b) a generator (c) a washing machine (d) a battery

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids