Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 785 · 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.True or false: a mixer grinder mainly gives out heat. (a) True (b) False
2. 2.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) to make it colourful (c) quick and clear for all (d) symbols are heavier
3. 3.True or false: a paper strip is a conductor. (a) False (b) True
4. 4.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
5. 5.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
6. 6.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the switch (c) the filament (d) the base
7. 7.Which of these is true of a series circuit? (a) each gets the full volts (b) one bulb out, all go out (c) one out, the rest glow (d) own switch for each bulb
8. 8.Which of these is a conductor? (a) a plastic straw (b) a paper strip (c) a rubber eraser (d) a copper wire
9. 9.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
10. 10.🔘 Which kind of switch stays where you flip it? (a) a reed switch (b) a tilt switch (c) a push button (d) a toggle switch
11. 11.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
12. 12.🔍 Which is the odd one out? (a) a plastic ruler (b) a rubber band (c) an iron nail (d) a paper strip
13. 13.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
14. 14.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
15. 15.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
16. 16.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
17. 17.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
18. 18.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
19. 19.🔋 How many 3 V cells must be joined in series to give 18 V?
20. 20.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
21. 21.Which drawing is the symbol for a switch? (a) a long and a short line (b) one tall, one short bar (c) two equal parallel lines (d) a line lifted at a gap
22. 22.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) little stars (c) dotted circles (d) wavy lines
23. 23.⚡ What does a toaster mainly change electricity into? (a) movement (b) sound (c) heat (d) light
24. 24.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
25. 25.💡 4 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
26. 26.Which drawing is the symbol for a bulb? (a) two equal parallel lines (b) a circle with an X in it (c) many long-short pairs (d) two or more cell symbols
27. 27.⚠️ Is it safe to throw cells in a fire? (a) safe (b) not safe
28. 28.🔍 Which is the odd one out? (a) open a phone charger (b) use small battery cells (c) stay away from pylons (d) keep drinks far away
29. 29.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
30. 30.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
31. 31.Which of these mainly makes sound? (a) a rice cooker (b) a mixer grinder (c) a street light (d) a doorbell
32. 32.🔋 What should you do with used-up cells? (a) throw them in a fire (b) give them for recycling (c) bury them in soil (d) cut them open
33. 33.🔦 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 metal paper clip. Does the bulb glow? (a) No (b) Yes
34. 34.Which drawing is the symbol for an ammeter? (a) two or more cell symbols (b) a line lifted at a gap (c) a circle with A inside (d) a plain rectangle
35. 35.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a small battery pack (c) a wall socket (d) an inverter socket
36. 36.🔍 Which is the odd one out? (a) a loudspeaker (b) a traffic signal (c) a siren (d) a school bell
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) brighter (b) the same (c) dimmer
38. 38.🔍 Which is the odd one out? (a) stop if a part gets hot (b) fly a kite near wires (c) stay away from pylons (d) dry your hands first
39. 39.Which of these is not safe? (a) keep drinks far away (b) poke things in a socket (c) build with an adult near (d) use small battery cells
40. 40.Which of these is an insulator? (a) a brass key (b) a graphite rod (c) aluminium foil (d) a cotton thread

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