Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 608 · 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 of these is an insulator? (a) a graphite rod (b) a copper wire (c) a paper strip (d) a brass key
2. 2.💡 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
3. 3.Which of these uses electricity? (a) an air conditioner (b) a power station (c) a cell (d) a wind turbine
4. 4.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
5. 5.🔍 Which is the odd one out? (a) a brass key (b) a ceramic cup (c) a paper strip (d) a wooden stick
6. 6.💡 5 identical bulbs are joined in series with a 12.5 V battery (ideal wires). How many volts does each bulb get? =
7. 7.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
8. 8.⚡ What does a traffic signal mainly change electricity into? (a) heat (b) movement (c) light (d) sound
9. 9.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the shorter line (c) the longer line (d) both lines
10. 10.🔘 Which kind of switch closes near a magnet? (a) a toggle switch (b) a push button (c) a slide switch (d) a reed switch
11. 11.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) No (b) Yes
12. 12.🔍 Which is the odd one out? (a) a wooden stick (b) a steel coin (c) a brass key (d) a safety pin
13. 13.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) not joined (d) in series
14. 14.Which of these mainly makes sound? (a) a toaster (b) a street light (c) a mixer grinder (d) a doorbell
15. 15.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) nuclear energy (c) wind energy (d) electrical energy
16. 16.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
17. 17.True or false: to fly kites in open fields is not safe. (a) False (b) True
18. 18.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic makes current (c) plastic is a conductor (d) plastic is an insulator
19. 19.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a full circuit (c) a series circuit (d) an open circuit
20. 20.🔋 What should you do with used-up cells? (a) give them for recycling (b) bury them in soil (c) cut them open (d) throw them in a fire
21. 21.🔘 Which kind of switch slides side to side? (a) a reed switch (b) a tilt switch (c) a slide switch (d) a push button
22. 22.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a short circuit (b) an open circuit (c) a parallel circuit (d) a safe circuit
23. 23.⚡ What does a tube light mainly change electricity into? (a) heat (b) sound (c) light (d) movement
24. 24.Which of these gives us electricity? (a) a refrigerator (b) a television (c) a washing machine (d) a generator
25. 25.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
26. 26.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
27. 27.Which of these is safe? (a) throw cells in a fire (b) fly a kite near wires (c) touch a fallen wire (d) build with an adult near
28. 28.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a fuse or MCB (c) a bulb (d) a plug top
29. 29.True or false: a copper wire is a conductor. (a) False (b) True
30. 30.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) one (c) two (d) none
31. 31.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) bulbs share the voltage (d) many paths for current
32. 32.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) bulb (b) junction (c) wire (d) battery
33. 33.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
34. 34.💡 A battery lights 3 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
35. 35.🔁 What must there be for a current to flow? (a) a plastic gap (b) a complete loop (c) a broken path (d) one loose end
36. 36.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
37. 37.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
38. 38.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a metal paper clip. Does the bulb glow? (a) No (b) Yes
39. 39.True or false: a push button stays where you flip it. (a) True (b) False
40. 40.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) the switch is ON (d) the bulb is unscrewed

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