Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 139 · 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.🔌 Is a glass marble a conductor or an insulator? (a) an insulator (b) a conductor
2. 2.🔘 Which kind of switch closes near a magnet? (a) a tilt switch (b) a toggle switch (c) a slide switch (d) a reed switch
3. 3.True or false: an electric iron mainly gives out heat. (a) False (b) True
4. 4.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) it is just untidy (c) water carries current (d) it spoils the paint
5. 5.🔍 Which is the odd one out? (a) a doorbell (b) a rice cooker (c) an electric iron (d) a water heater
6. 6.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
7. 7.🔦 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 paper strip. Does the bulb glow? (a) No (b) Yes
8. 8.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
9. 9.🔘 A bulb and a cell are joined through 6 switches on 6 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
10. 10.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
11. 11.True or false: a circle with a cross is the symbol for a bulb. (a) False (b) True
12. 12.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) water drops (c) photons (d) dust particles
13. 13.🔋 Does a battery give electricity or use electricity? (a) uses electricity (b) gives electricity
14. 14.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) cell (b) motor (c) LED (d) junction
15. 15.Which drawing is the symbol for a bulb? (a) a straight line (b) one tall, one short bar (c) a plain rectangle (d) a circle with an X in it
16. 16.🔋 How many 3 V cells must be joined in series to give 12 V?
17. 17.True or false: triangle, bar and arrows is the symbol for a resistor. (a) True (b) False
18. 18.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
19. 19.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in series (c) in parallel (d) not joined
20. 20.🔍 Which is the odd one out? (a) take cells out after use (b) keep drinks far away (c) fly kites in open fields (d) climb an electric pole
21. 21.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) cell (b) bulb (c) junction (d) motor
22. 22.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
23. 23.💡 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?
24. 24.🔦 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 brass key. Does the bulb glow? (a) No (b) Yes
25. 25.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
26. 26.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 3 glow? (a) No (b) Yes
27. 27.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
28. 28.💡 A battery lights 5 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
29. 29.🔦 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 copper wire. Does the bulb glow? (a) No (b) Yes
30. 30.🔍 Which is the odd one out? (a) fly a kite near wires (b) fly kites in open fields (c) poke things in a socket (d) open a phone charger
31. 31.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) cell (b) switch (c) motor (d) LED
32. 32.🔍 Which is the odd one out? (a) open a phone charger (b) poke things in a socket (c) use mains for a project (d) take cells out after use
33. 33.Which of these means the circuit is closed? (a) all wires are joined (b) a wire is cut (c) the switch is OFF (d) a cell is taken out
34. 34.⚡ What does a ceiling fan mainly change electricity into? (a) sound (b) movement (c) heat (d) light
35. 35.💡 4 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. Bulb 4 is taken out of its holder. How many bulbs glow?
36. 36.Which drawing is the symbol for a motor? (a) a straight line (b) a circle with M inside (c) a dot where wires meet (d) a long and a short line
37. 37.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic makes current (d) plastic is an insulator
38. 38.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
39. 39.What does a toggle switch do? (a) stays where you flip it (b) slides side to side (c) closes near a magnet (d) works only while pressed
40. 40.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a plug top (c) a long wire (d) a bulb

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