Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 856 · 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.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) each gets full voltage (d) to save copper only
2. 2.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) the longer line (c) neither line (d) both lines
3. 3.🔍 Which is the odd one out? (a) a rubber band (b) aluminium foil (c) a steel spoon (d) a brass key
4. 4.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic is an insulator (d) plastic makes current
5. 5.🔘 Which kind of switch flips up or down? (a) a tilt switch (b) a push button (c) a toggle switch (d) a reed switch
6. 6.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) motor (b) resistor (c) switch (d) bulb
7. 7.🔍 Which is the odd one out? (a) open a phone charger (b) fly a kite near wires (c) use a cable with cuts (d) fly kites in open fields
8. 8.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) none (d) one
9. 9.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
10. 10.💡 6 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
11. 11.Which of these uses electricity? (a) a solar panel (b) a television (c) a generator (d) a wind turbine
12. 12.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) own switch for each bulb (d) a single current path
13. 13.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
14. 14.🔌 Most metals are good … (a) insulators (b) magnets only (c) batteries (d) conductors
15. 15.Which of these is an insulator? (a) a glass marble (b) a safety pin (c) aluminium foil (d) a metal paper clip
16. 16.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
17. 17.🔋 5 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
18. 18.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) dotted circles (c) little stars (d) wavy lines
19. 19.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 12 V (c) 230 V (d) 9 V
20. 20.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) in series (d) not joined
21. 21.🔍 Which is the odd one out? (a) take cells out after use (b) climb an electric pole (c) use small battery cells (d) build with an adult near
22. 22.🔋 Does an air conditioner give electricity or use electricity? (a) uses electricity (b) gives electricity
23. 23.Which of these uses electricity? (a) a generator (b) a wind turbine (c) a solar panel (d) a refrigerator
24. 24.Which of these is true of a parallel circuit? (a) many paths for current (b) a single current path (c) bulbs share the voltage (d) a break stops every bulb
25. 25.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the glass (c) the filament (d) the switch
26. 26.🔋 What should you do with used-up cells? (a) throw them in a fire (b) bury them in soil (c) give them for recycling (d) cut them open
27. 27.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) Yes (b) No
28. 28.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) the same voltage (c) double the voltage (d) no voltage
29. 29.True or false: a line lifted at a gap is the symbol for a switch. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) dry your hands first (b) stop if a part gets hot (c) build with an adult near (d) open a phone charger
31. 31.True or false: a mixer grinder mainly gives out light. (a) False (b) True
32. 32.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
33. 33.🔋 What is a battery? (a) two or more cells joined (b) a kind of bulb (c) one single wire (d) a switch with a lid
34. 34.Which of these is true of a parallel circuit? (a) used in house wiring (b) a break stops every bulb (c) bulbs share the voltage (d) a single current path
35. 35.What does a slide switch do? (a) closes near a magnet (b) slides side to side (c) flips up or down (d) stays where you flip it
36. 36.🔘 Which kind of switch springs back when let go? (a) a tilt switch (b) a slide switch (c) a push button (d) a toggle switch
37. 37.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the switch is ON (d) a cell is taken out
38. 38.Which of these is safe? (a) touch a switch when wet (b) poke things in a socket (c) use mains for a project (d) build with an adult near
39. 39.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
40. 40.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they get dimmer (c) they explode (d) they all go out

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