Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 343 · 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 gives out heat? (a) a loudspeaker (b) an electric kettle (c) a traffic signal (d) an LED lamp
2. 2.🔋 8 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)? =
3. 3.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
4. 4.🔦 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 safety pin. Does the bulb glow? (a) No (b) Yes
5. 5.🔋 3 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
6. 6.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they explode (d) they all go out
7. 7.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
8. 8.True or false: a toggle switch works only while pressed. (a) False (b) True
9. 9.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) in series (d) by Wi-Fi
10. 10.True or false: to touch a fallen wire is safe. (a) True (b) False
11. 11.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
12. 12.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
13. 13.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) it spoils the paint (c) it is just untidy (d) water carries current
14. 14.Which drawing is the symbol for a capacitor? (a) a circle with a cross (b) a plain rectangle (c) triangle against a bar (d) two equal parallel lines
15. 15.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
16. 16.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) resistor (b) voltmeter (c) cell (d) capacitor
17. 17.Which of these is safe? (a) use small battery cells (b) use mains for a project (c) touch a fallen wire (d) fly a kite near wires
18. 18.🔍 Which is the odd one out? (a) a woollen thread (b) a brass key (c) an iron nail (d) a graphite rod
19. 19.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
20. 20.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
21. 21.True or false: to fly kites in open fields is not safe. (a) False (b) True
22. 22.True or false: to fly a kite near wires is not safe. (a) False (b) True
23. 23.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
24. 24.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) used in house wiring (c) a single current path (d) one bulb out, all go out
25. 25.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is ON, C is ON and D is OFF. Does the bulb glow? (a) Yes (b) No
26. 26.🔋 5 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)? =
27. 27.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
28. 28.True or false: if a cell is taken out, the circuit is open and no current flows. (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) an electric toy car (b) a ceiling fan (c) a rice cooker (d) an exhaust fan
30. 30.Which of these is true of a series circuit? (a) used in house wiring (b) each gets the full volts (c) own switch for each bulb (d) a single current path
31. 31.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
32. 32.True or false: “a single current path” is true of a series circuit. (a) False (b) True
33. 33.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic ruler across the gap. Does the bulb glow? (a) Yes (b) No
34. 34.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) motor (b) bulb (c) LED (d) junction
35. 35.What does a push button do? (a) closes when tipped over (b) slides side to side (c) works only while pressed (d) flips up or down
36. 36.True or false: a mixer grinder mainly gives out light. (a) True (b) False
37. 37.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
38. 38.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 6 is taken out of its holder. How many bulbs glow?
39. 39.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) the shorter line (d) neither line
40. 40.True or false: triangle against a bar is the symbol for a junction. (a) True (b) False

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