Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 825 · 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 uses electricity? (a) a wind turbine (b) a solar panel (c) a mobile phone (d) a cell
2. 2.True or false: to use a cable with cuts is safe. (a) False (b) True
3. 3.Which of these is not safe? (a) build with an adult near (b) stop if a part gets hot (c) use a cable with cuts (d) use small battery cells
4. 4.🔍 Which is the odd one out? (a) a graphite rod (b) a rubber eraser (c) a rubber band (d) a plastic straw
5. 5.Which of these is safe? (a) use a cable with cuts (b) fly a kite near wires (c) take cells out after use (d) touch a fallen wire
6. 6.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
7. 7.Which of these uses electricity? (a) a wind turbine (b) an air conditioner (c) a bicycle dynamo (d) a solar panel
8. 8.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in series (c) in parallel (d) by Wi-Fi
9. 9.🔦 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 rubber band. Does the bulb glow? (a) No (b) Yes
10. 10.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
11. 11.True or false: a line lifted at a gap is the symbol for a junction. (a) True (b) False
12. 12.🔋 3 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
13. 13.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
14. 14.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
15. 15.🔘 Which kind of switch flips up or down? (a) a slide switch (b) a toggle switch (c) a reed switch (d) a tilt switch
16. 16.True or false: a circle with V inside is the symbol for a motor. (a) True (b) False
17. 17.Which of these is true of a parallel circuit? (a) a single current path (b) used in house wiring (c) one bulb out, all go out (d) a break stops every bulb
18. 18.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) an inverter socket (c) a mains extension board (d) a small battery pack
19. 19.🔘 When a switch is ON, the circuit is … (a) broken (b) open (c) closed (d) cut
20. 20.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
21. 21.🔘 Which kind of switch closes near a magnet? (a) a tilt switch (b) a toggle switch (c) a reed switch (d) a push button
22. 22.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they explode (c) they get dimmer (d) they all go out
23. 23.🔘 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 OFF. Does the bulb glow? (a) Yes (b) No
24. 24.🔦 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 an iron nail. Does the bulb glow? (a) No (b) Yes
25. 25.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
26. 26.⚡ Which tiny particles drift along a metal wire to carry the current? (a) water drops (b) electrons (c) photons (d) dust particles
27. 27.Which of these is true of a series circuit? (a) many paths for current (b) each gets the full volts (c) used in house wiring (d) a break stops every bulb
28. 28.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
29. 29.True or false: one tall, one short bar is the symbol for a capacitor. (a) True (b) False
30. 30.Which drawing is the symbol for an ammeter? (a) many long-short pairs (b) a circle with A inside (c) two equal parallel lines (d) triangle against a bar
31. 31.🔋 What is a battery? (a) a switch with a lid (b) a kind of bulb (c) one single wire (d) two or more cells joined
32. 32.Which of these means the circuit is closed? (a) the switch is ON (b) the switch is OFF (c) the bulb is unscrewed (d) a wire has come loose
33. 33.What does a tilt switch do? (a) closes when tipped over (b) works only while pressed (c) flips up or down (d) slides side to side
34. 34.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) friction (c) electric current (d) a magnet
35. 35.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
36. 36.🔍 Which is the odd one out? (a) an exhaust fan (b) a mixer grinder (c) a siren (d) a table fan
37. 37.Which of these is a conductor? (a) a dry cork (b) a plastic straw (c) a paper strip (d) a safety pin
38. 38.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
39. 39.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) neither line (c) the shorter line (d) both lines
40. 40.💡 3 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =

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