Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 274 · 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.🔋 2 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)? =
2. 2.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) to save copper only (d) so all go off together
3. 3.🔋 Does a washing machine give electricity or use electricity? (a) uses electricity (b) gives electricity
4. 4.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
5. 5.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
6. 6.True or false: a circle with an X in it is the symbol for a voltmeter. (a) True (b) False
7. 7.Which drawing is the symbol for a cell? (a) a circle with a cross (b) many long-short pairs (c) a line lifted at a gap (d) a long and a short line
8. 8.🔍 Which is the odd one out? (a) a woollen thread (b) a ceramic cup (c) a dry cork (d) an iron nail
9. 9.⚡ A solar panel changes which kind of energy into electricity? (a) wind energy (b) chemical energy (c) sound energy (d) light energy
10. 10.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
11. 11.🔦 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 glass marble. Does the bulb glow? (a) No (b) Yes
12. 12.🔘 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
13. 13.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
14. 14.💡 5 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. Bulbs 2 and 3 are taken out of their holders. How many bulbs glow?
15. 15.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) one (d) none
16. 16.True or false: a straight line is the symbol for a wire. (a) False (b) True
17. 17.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) cell (b) junction (c) diode (d) motor
18. 18.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
19. 19.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
20. 20.True or false: aluminium foil is an insulator. (a) True (b) False
21. 21.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) resistor (b) motor (c) switch (d) cell
22. 22.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
23. 23.💡 5 identical bulbs are joined in series with a 12.5 V battery (ideal wires). How many volts does each bulb get? =
24. 24.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
25. 25.True or false: to touch a switch when wet is not safe. (a) True (b) False
26. 26.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) ammeter (b) battery (c) wire (d) resistor
27. 27.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 230 V (c) 9 V (d) 12 V
28. 28.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
29. 29.Which drawing is the symbol for a battery? (a) triangle, bar and arrows (b) one tall, one short bar (c) a circle with V inside (d) two or more cell symbols
30. 30.Which of these is safe? (a) use mains for a project (b) poke things in a socket (c) open a phone charger (d) stop if a part gets hot
31. 31.True or false: a mixer grinder mainly gives out heat. (a) False (b) True
32. 32.True or false: if a cell is taken out, the circuit is open and no current flows. (a) True (b) False
33. 33.Which of these is a conductor? (a) a wooden stick (b) a graphite rod (c) a cotton thread (d) a ceramic cup
34. 34.True or false: if the loop is complete, the circuit is closed and current flows. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) a steel spoon (b) a metal paper clip (c) a plastic straw (d) an iron nail
36. 36.🔍 Which is the odd one out? (a) a wooden stick (b) a rubber band (c) a steel spoon (d) a plastic straw
37. 37.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the glass (c) the switch (d) the filament
38. 38.🔘 Which kind of switch stays where you flip it? (a) a push button (b) a tilt switch (c) a slide switch (d) a toggle switch
39. 39.🔘 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 ON, B is OFF, C is ON and D is ON. Does the bulb glow? (a) No (b) Yes
40. 40.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) ammeter (b) resistor (c) motor (d) switch

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