Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 609 · 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.🔋 What is a battery? (a) a switch with a lid (b) one single wire (c) two or more cells joined (d) a kind of bulb
2. 2.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) Yes (b) No
3. 3.Which of these mainly gives out light? (a) a street light (b) an electric toy car (c) a toaster (d) an exhaust fan
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) the same (c) dimmer
5. 5.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
6. 6.💡 3 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
7. 7.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
8. 8.🔦 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
9. 9.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a woollen thread. Does the bulb glow? (a) Yes (b) No
10. 10.💡 4 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
11. 11.⚡ What does an electric drill mainly change electricity into? (a) light (b) sound (c) movement (d) heat
12. 12.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) to hide the circuit (d) quick and clear for all
13. 13.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
14. 14.Which of these is true of a series circuit? (a) a break stops every bulb (b) used in house wiring (c) many paths for current (d) one out, the rest glow
15. 15.🔘 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 OFF, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
16. 16.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
17. 17.Which of these mainly gives out light? (a) a water heater (b) a siren (c) a tube light (d) a table fan
18. 18.🔍 Which is the odd one out? (a) a school bell (b) a tube light (c) a torch (d) an LED lamp
19. 19.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
20. 20.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
21. 21.Which of these is a conductor? (a) a paper strip (b) a ceramic cup (c) a copper wire (d) a wooden stick
22. 22.Which of these uses electricity? (a) a bicycle dynamo (b) a wind turbine (c) a solar panel (d) a refrigerator
23. 23.🔋 8 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
24. 24.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 5 glow? (a) Yes (b) No
25. 25.Which of these is a conductor? (a) a plastic ruler (b) aluminium foil (c) a plastic straw (d) a ceramic cup
26. 26.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
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: a circle with M inside is the symbol for a bulb. (a) True (b) False
29. 29.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
30. 30.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
31. 31.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) a smaller voltage (c) the same voltage (d) no voltage
32. 32.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) the shorter line (d) neither line
33. 33.Which of these mainly gives out light? (a) an electric iron (b) a room heater (c) a torch (d) an electric kettle
34. 34.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
35. 35.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) motor (b) switch (c) battery (d) ammeter
36. 36.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) wire (b) battery (c) junction (d) switch
37. 37.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
38. 38.💡 2 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?
39. 39.Which drawing is the symbol for a voltmeter? (a) triangle against a bar (b) a circle with A inside (c) a circle with M inside (d) a circle with V inside
40. 40.🔘 What does a switch do in a circuit? (a) opens or closes the loop (b) makes electricity (c) stores current (d) changes the voltage

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