Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 711 · 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 is the odd one out? (a) touch a fallen wire (b) stay away from pylons (c) throw cells in a fire (d) use a cable with cuts
2. 2.🔦 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 brass key. Does the bulb glow? (a) No (b) Yes
3. 3.True or false: an LED lamp mainly gives out light. (a) True (b) False
4. 4.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
5. 5.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) electric current (c) sound (d) friction
6. 6.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) junction (b) wire (c) battery (d) resistor
7. 7.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
8. 8.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is OFF. Does the bulb glow? (a) No (b) Yes
9. 9.🔍 Which is the odd one out? (a) keep drinks far away (b) dry your hands first (c) open a phone charger (d) use small battery cells
10. 10.🔋 What is a battery? (a) one single wire (b) a switch with a lid (c) a kind of bulb (d) two or more cells joined
11. 11.💡 A battery lights 2 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
12. 12.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) No (b) Yes
13. 13.Which of these is an insulator? (a) an iron nail (b) aluminium foil (c) a copper wire (d) a plastic ruler
14. 14.Which of these mainly gives out heat? (a) a buzzer (b) a toaster (c) a mixer grinder (d) a torch
15. 15.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
16. 16.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
17. 17.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the filament (b) the glass (c) the switch (d) the base
18. 18.🔦 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) Yes (b) No
19. 19.True or false: if the loop is complete, the circuit is open and no current flows. (a) True (b) False
20. 20.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
21. 21.🔦 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 an iron nail. Does the bulb glow? (a) No (b) Yes
22. 22.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) neither line (d) the longer line
23. 23.🔍 Which is the odd one out? (a) an electric kettle (b) an electric toy car (c) an exhaust fan (d) an electric drill
24. 24.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 9 V (c) 1.5 V (d) 12 V
25. 25.True or false: a plain rectangle is the symbol for a resistor. (a) False (b) True
26. 26.⚡ What does a siren mainly change electricity into? (a) heat (b) light (c) movement (d) sound
27. 27.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
28. 28.Which of these is an insulator? (a) an iron nail (b) aluminium foil (c) a dry cork (d) a steel spoon
29. 29.🔍 Which is the odd one out? (a) a toaster (b) a room heater (c) an electric kettle (d) an exhaust fan
30. 30.🔘 Which kind of switch slides side to side? (a) a slide switch (b) a toggle switch (c) a reed switch (d) a tilt switch
31. 31.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
32. 32.🔦 A circuit has a used-up (dead) 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 ceramic cup. Does the bulb glow? (a) Yes (b) No
33. 33.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is ON, C is ON and D is OFF. Does the bulb glow? (a) No (b) Yes
34. 34.🔋 Does a wind turbine give electricity or use electricity? (a) gives electricity (b) uses electricity
35. 35.🔦 A circuit has a used-up (dead) 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 plastic ruler. Does the bulb glow? (a) Yes (b) No
36. 36.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is OFF, C is ON and D is ON. Does the bulb glow? (a) No (b) Yes
37. 37.🔍 Which is the odd one out? (a) an electric iron (b) a water heater (c) a siren (d) a room heater
38. 38.True or false: to keep drinks far away is safe. (a) False (b) True
39. 39.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
40. 40.True or false: “many paths for current” is true of a series circuit. (a) False (b) True

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