Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 709 · 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 is true of a parallel circuit? (a) one bulb out, all go out (b) many paths for current (c) bulbs share the voltage (d) a break stops every bulb
2. 2.True or false: a circle with A inside is the symbol for a junction. (a) False (b) True
3. 3.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in parallel (c) in series (d) by Wi-Fi
4. 4.True or false: an electric drill mainly makes movement. (a) False (b) True
5. 5.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
6. 6.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
7. 7.True or false: a dot where wires meet is the symbol for a cell. (a) True (b) False
8. 8.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
9. 9.🔋 6 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
10. 10.💡 4 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 4 is taken out of its holder. How many bulbs glow?
11. 11.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is ON, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
12. 12.True or false: a traffic signal mainly gives out light. (a) True (b) False
13. 13.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
14. 14.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) quick and clear for all (c) symbols are heavier (d) to make it colourful
15. 15.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
16. 16.🔋 What is a battery? (a) a switch with a lid (b) one single wire (c) a kind of bulb (d) two or more cells joined
17. 17.🔘 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 OFF and B is OFF. Does the bulb glow? (a) No (b) Yes
18. 18.Which of these uses electricity? (a) a computer (b) a power station (c) a wind turbine (d) a battery
19. 19.Which of these gives us electricity? (a) an air conditioner (b) a battery (c) a mobile phone (d) a television
20. 20.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the switch (c) the filament (d) the base
21. 21.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
22. 22.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
23. 23.⚡ What do we call a flow of electric charge through a wire? (a) friction (b) sound (c) electric current (d) a magnet
24. 24.🔋 A 12 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
25. 25.🔍 Which is the odd one out? (a) a safety pin (b) a copper wire (c) an iron nail (d) a glass marble
26. 26.True or false: triangle, bar and arrows is the symbol for a junction. (a) True (b) False
27. 27.⚡ What does a school bell mainly change electricity into? (a) light (b) sound (c) heat (d) movement
28. 28.🔦 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 a copper wire. Does the bulb glow? (a) Yes (b) No
29. 29.🔋 3 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
30. 30.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
31. 31.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
32. 32.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 230 V (c) 12 V (d) 1.5 V
33. 33.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
34. 34.🔘 When a switch is ON, the circuit is … (a) open (b) closed (c) cut (d) broken
35. 35.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) straight lines (c) dotted circles (d) wavy lines
36. 36.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) one bulb out, all go out (d) each gets the full volts
37. 37.🔘 Which kind of switch closes when tipped over? (a) a tilt switch (b) a slide switch (c) a reed switch (d) a toggle switch
38. 38.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) plastic makes current (c) plastic is a conductor (d) to make them heavy
39. 39.⚡ What does a street light mainly change electricity into? (a) sound (b) light (c) heat (d) movement
40. 40.Which drawing is the symbol for a resistor? (a) a circle with A inside (b) a long and a short line (c) a circle with V inside (d) a plain rectangle

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