Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 835 · 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.💡 5 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. Bulbs 1 and 3 are taken out of their holders. How many bulbs glow?
2. 2.True or false: a steel spoon is a conductor. (a) False (b) True
3. 3.Which of these is true of a series circuit? (a) one out, the rest glow (b) one bulb out, all go out (c) many paths for current (d) each gets the full volts
4. 4.🔘 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
5. 5.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a bulb (c) a plug top (d) a fuse or MCB
6. 6.Which of these is a conductor? (a) a dry cork (b) a copper wire (c) a plastic straw (d) a ceramic cup
7. 7.Which of these mainly makes sound? (a) a mixer grinder (b) an electric kettle (c) a school bell (d) a table fan
8. 8.⚡ What does a rice cooker mainly change electricity into? (a) sound (b) light (c) movement (d) heat
9. 9.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) to save copper only (d) each gets full voltage
10. 10.🔘 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
11. 11.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the plastic handle (c) the metal tip (d) the steel shaft
12. 12.⚠️ Is it safe to fly a kite near wires? (a) safe (b) not safe
13. 13.Which drawing is the symbol for a voltmeter? (a) a plain rectangle (b) a circle with A inside (c) a circle with V inside (d) a straight line
14. 14.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
15. 15.🔦 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 rubber band. Does the bulb glow? (a) Yes (b) No
16. 16.Which of these is not safe? (a) take cells out after use (b) build with an adult near (c) use small battery cells (d) use a cable with cuts
17. 17.True or false: a toggle switch flips up or down. (a) True (b) False
18. 18.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) water drops (c) electrons (d) dust particles
19. 19.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
20. 20.💡 3 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
21. 21.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
22. 22.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
23. 23.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
24. 24.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
25. 25.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
26. 26.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) the switch is ON (d) a wire is cut
27. 27.💡 In a series circuit, how many paths does the current have? (a) one (b) one for each bulb (c) two (d) none
28. 28.True or false: a circle with A inside is the symbol for an ammeter. (a) False (b) True
29. 29.True or false: if the loop is complete, the circuit is closed and current flows. (a) True (b) False
30. 30.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) battery (b) cell (c) junction (d) LED
31. 31.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
32. 32.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) ammeter (b) voltmeter (c) wire (d) resistor
33. 33.🔌 Is a rubber band a conductor or an insulator? (a) an insulator (b) a conductor
34. 34.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
35. 35.💡 2 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. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
36. 36.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
37. 37.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) chemical energy (c) light energy (d) sound energy
38. 38.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
39. 39.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) a break stops every bulb (d) each gets the full volts
40. 40.True or false: a straight line is the symbol for a cell. (a) True (b) False

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