Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 445 · 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 kind of switch closes when tipped over? (a) a push button (b) a tilt switch (c) a toggle switch (d) a reed switch
2. 2.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
3. 3.True or false: a circle with A inside is the symbol for a battery. (a) True (b) False
4. 4.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
5. 5.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) False (b) True
6. 6.🔍 Which is the odd one out? (a) a torch (b) an exhaust fan (c) an electric toy car (d) a ceiling fan
7. 7.🔍 Which is the odd one out? (a) use small battery cells (b) throw cells in a fire (c) use mains for a project (d) touch a fallen wire
8. 8.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
9. 9.Which of these means the circuit is closed? (a) a wire has come loose (b) the switch is OFF (c) the bulb is unscrewed (d) all wires are joined
10. 10.Which of these is not safe? (a) stay away from pylons (b) throw cells in a fire (c) stop if a part gets hot (d) take cells out after use
11. 11.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
12. 12.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) battery (b) motor (c) wire (d) cell
13. 13.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
14. 14.🔍 Which is the odd one out? (a) build with an adult near (b) use a cable with cuts (c) throw cells in a fire (d) use mains for a project
15. 15.🔘 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) Yes (b) No
16. 16.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
17. 17.Which of these is a conductor? (a) a cotton thread (b) a rubber band (c) a glass marble (d) a copper wire
18. 18.True or false: to dry your hands first is not safe. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) an electric drill (b) a mixer grinder (c) an electric toy car (d) a tube light
20. 20.True or false: a slide switch slides side to side. (a) True (b) False
21. 21.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
22. 22.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) Yes (b) No
23. 23.True or false: if the loop is complete, the circuit is open and no current flows. (a) True (b) False
24. 24.True or false: a rubber band is a conductor. (a) False (b) True
25. 25.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
26. 26.🔍 Which is the odd one out? (a) a water heater (b) a mixer grinder (c) a room heater (d) an electric kettle
27. 27.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
28. 28.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a wall socket (c) a small battery pack (d) a mains extension board
29. 29.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) cell (b) voltmeter (c) battery (d) motor
30. 30.True or false: a brass key is a conductor. (a) True (b) False
31. 31.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
32. 32.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
33. 33.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
34. 34.Which of these is true of a parallel circuit? (a) a single current path (b) many paths for current (c) bulbs share the voltage (d) one bulb out, all go out
35. 35.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
36. 36.🔍 Which is the odd one out? (a) a water heater (b) a doorbell (c) a loudspeaker (d) a siren
37. 37.Which of these is safe? (a) take cells out after use (b) use a cable with cuts (c) touch a switch when wet (d) touch a fallen wire
38. 38.🔘 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 ON, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
39. 39.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) half the voltage (c) no voltage (d) the same voltage
40. 40.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing

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