Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 971 · 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 is not safe? (a) stop if a part gets hot (b) dry your hands first (c) stay away from pylons (d) open a phone charger
2. 2.🔌 Is a steel spoon a conductor or an insulator? (a) a conductor (b) an insulator
3. 3.🔍 Which is the odd one out? (a) climb an electric pole (b) throw cells in a fire (c) use small battery cells (d) touch a switch when wet
4. 4.💡 3 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?
5. 5.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
6. 6.🔍 Which is the odd one out? (a) stay away from pylons (b) open a phone charger (c) keep drinks far away (d) fly kites in open fields
7. 7.What does a slide switch do? (a) closes near a magnet (b) works only while pressed (c) slides side to side (d) flips up or down
8. 8.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
9. 9.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
10. 10.🔘 Which kind of switch flips up or down? (a) a tilt switch (b) a slide switch (c) a reed switch (d) a toggle switch
11. 11.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
12. 12.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) straight lines (d) little stars
13. 13.🔍 Which is the odd one out? (a) a rubber band (b) a copper wire (c) a steel coin (d) an iron nail
14. 14.True or false: a traffic signal mainly makes sound. (a) False (b) True
15. 15.What does a push button do? (a) closes near a magnet (b) springs back when let go (c) flips up or down (d) closes when tipped over
16. 16.True or false: an electric kettle mainly gives out light. (a) False (b) True
17. 17.🔁 What must there be for a current to flow? (a) one loose end (b) a plastic gap (c) a broken path (d) a complete loop
18. 18.True or false: a plastic ruler is a conductor. (a) True (b) False
19. 19.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 9 V (c) 230 V (d) 12 V
20. 20.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) shout for an adult (c) wait and watch (d) pour water on them
21. 21.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
22. 22.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
23. 23.⚡ What does a water heater mainly change electricity into? (a) light (b) movement (c) sound (d) heat
24. 24.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) the bulb is unscrewed (d) the loop is complete
25. 25.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
26. 26.⚡ A cell changes stored chemical energy into which kind of energy? (a) wind energy (b) nuclear energy (c) sound energy (d) electrical energy
27. 27.🔌 Which metal is used for most electric wires at home? (a) copper (b) plastic (c) rubber (d) glass
28. 28.💡 5 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
29. 29.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
30. 30.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to save copper only (d) to make bulbs dim
31. 31.🔍 Which is the odd one out? (a) an electric kettle (b) an electric toy car (c) a rice cooker (d) a toaster
32. 32.🔘 Which kind of switch stays where you flip it? (a) a tilt switch (b) a reed switch (c) a slide switch (d) a toggle switch
33. 33.True or false: a tilt switch closes when tipped over. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) climb an electric pole (b) use small battery cells (c) stop if a part gets hot (d) dry your hands first
35. 35.🔋 What should you do with used-up cells? (a) throw them in a fire (b) cut them open (c) bury them in soil (d) give them for recycling
36. 36.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) Yes (b) No
37. 37.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
38. 38.True or false: if a wire is cut, the circuit is closed and current flows. (a) False (b) True
39. 39.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) symbols are heavier (c) to make it colourful (d) to hide the circuit
40. 40.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open

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