Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 878 · 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 it safe to dry your hands first? (a) safe (b) not safe
2. 2.🔘 Which kind of switch slides side to side? (a) a push button (b) a tilt switch (c) a reed switch (d) a slide switch
3. 3.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) voltmeter (b) junction (c) switch (d) diode
4. 4.Which of these uses electricity? (a) a cell (b) a generator (c) a battery (d) a water pump
5. 5.💡 A battery lights 4 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
6. 6.🔍 Which is the odd one out? (a) a rubber eraser (b) a plastic straw (c) a copper wire (d) a glass marble
7. 7.True or false: if a wire is cut, the circuit is open and no current flows. (a) False (b) True
8. 8.🔦 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 safety pin. Does the bulb glow? (a) No (b) Yes
9. 9.True or false: a steel coin is an insulator. (a) False (b) True
10. 10.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
11. 11.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) both lines (d) the longer line
12. 12.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber eraser across the gap. Does the bulb glow? (a) No (b) Yes
13. 13.True or false: a copper wire is an insulator. (a) True (b) False
14. 14.🔦 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 dry cork. Does the bulb glow? (a) Yes (b) No
15. 15.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a long wire (c) a fuse or MCB (d) a bulb
16. 16.🔍 Which is the odd one out? (a) stop if a part gets hot (b) touch a fallen wire (c) stay away from pylons (d) keep drinks far away
17. 17.🔋 Does a television give electricity or use electricity? (a) uses electricity (b) gives electricity
18. 18.💡 5 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
19. 19.🔍 Which is the odd one out? (a) a steel spoon (b) an iron nail (c) a graphite rod (d) a dry cork
20. 20.Which of these is a conductor? (a) a rubber band (b) a paper strip (c) a wooden stick (d) a safety pin
21. 21.True or false: if a cell is taken out, the circuit is open and no current flows. (a) True (b) False
22. 22.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
23. 23.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
24. 24.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
25. 25.🔋 How many 2 V cells must be joined in series to give 12 V?
26. 26.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
27. 27.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
28. 28.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) dust particles (c) water drops (d) photons
29. 29.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to make bulbs dim (d) to save copper only
30. 30.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 cell is taken out
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 ON, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
32. 32.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
33. 33.🔦 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 rubber band. Does the bulb glow? (a) Yes (b) No
34. 34.🔋 4 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
35. 35.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
36. 36.✏️ In a circuit diagram, which part is drawn as a straight line? (a) LED (b) voltmeter (c) junction (d) wire
37. 37.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
38. 38.🔘 Which kind of switch works only while pressed? (a) a push button (b) a tilt switch (c) a toggle switch (d) a reed switch
39. 39.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
40. 40.Which of these is a conductor? (a) a glass marble (b) a dry cork (c) a cotton thread (d) a metal paper clip

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