Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 972 · 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 rubber band (b) aluminium foil (c) a copper wire (d) an iron nail
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 rubber eraser. Does the bulb glow? (a) Yes (b) No
3. 3.Which of these is not safe? (a) use small battery cells (b) fly a kite near wires (c) keep drinks far away (d) fly kites in open fields
4. 4.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
5. 5.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
6. 6.True or false: to keep drinks far away is not safe. (a) True (b) False
7. 7.🔦 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 wooden stick. Does the bulb glow? (a) No (b) Yes
8. 8.🔍 Which is the odd one out? (a) a night lamp (b) a tube light (c) a room heater (d) a street light
9. 9.⚡ What does a street light mainly change electricity into? (a) movement (b) sound (c) light (d) heat
10. 10.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a reed switch (c) a push button (d) a toggle switch
11. 11.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
12. 12.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) a cell is taken out (c) a wire has come loose (d) the switch is ON
13. 13.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
14. 14.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
15. 15.What does a reed switch do? (a) slides side to side (b) closes near a magnet (c) works only while pressed (d) flips up or down
16. 16.Which of these is a conductor? (a) a steel coin (b) a rubber eraser (c) a glass marble (d) a plastic straw
17. 17.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
18. 18.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) by Wi-Fi (c) in parallel (d) in series
19. 19.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
20. 20.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
21. 21.Which of these mainly gives out heat? (a) a torch (b) a tube light (c) a siren (d) a rice cooker
22. 22.Which of these means the circuit is open? (a) a cell is taken out (b) all wires are joined (c) the loop is complete (d) the switch is ON
23. 23.Which of these is an insulator? (a) a graphite rod (b) an iron nail (c) a safety pin (d) a dry cork
24. 24.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
25. 25.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) water drops (c) dust particles (d) photons
26. 26.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
27. 27.True or false: a small empty box is the symbol for a cell. (a) True (b) False
28. 28.What does a toggle switch do? (a) stays where you flip it (b) slides side to side (c) closes when tipped over (d) closes near a magnet
29. 29.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 0.5 V (c) 15 V (d) 1.5 V
30. 30.⚡ What does a toaster mainly change electricity into? (a) movement (b) heat (c) light (d) sound
31. 31.🔋 How many 2 V cells must be joined in series to give 6 V?
32. 32.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
33. 33.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) chemical energy (c) sound energy (d) movement energy
34. 34.🔋 Does a water pump give electricity or use electricity? (a) gives electricity (b) uses electricity
35. 35.⚡ What does an electric iron mainly change electricity into? (a) sound (b) light (c) heat (d) movement
36. 36.Which drawing is the symbol for a motor? (a) a circle with V inside (b) a circle with M inside (c) a plain rectangle (d) one tall, one short bar
37. 37.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
38. 38.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) no voltage (c) the same voltage (d) a smaller voltage
39. 39.Which drawing is the symbol for a capacitor? (a) a plain rectangle (b) two equal parallel lines (c) a straight line (d) a long and a short line
40. 40.🔋 How many 2 V cells must be joined in series to give 10 V?

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