Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 838 · 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.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. Does bulb 3 glow? (a) No (b) Yes
2. 2.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
3. 3.True or false: a rice cooker mainly gives out heat. (a) False (b) True
4. 4.Which of these is an insulator? (a) a metal paper clip (b) an iron nail (c) a copper wire (d) a plastic straw
5. 5.What does a push button do? (a) flips up or down (b) slides side to side (c) works only while pressed (d) stays where you flip it
6. 6.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
7. 7.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
8. 8.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) diode (b) motor (c) bulb (d) battery
9. 9.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
10. 10.Which of these is an insulator? (a) a wooden stick (b) a metal paper clip (c) a brass key (d) a graphite rod
11. 11.True or false: a tilt switch closes when tipped over. (a) True (b) False
12. 12.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in parallel (d) in series
13. 13.True or false: a rubber band is an insulator. (a) True (b) False
14. 14.Which of these mainly gives out light? (a) a school bell (b) a toaster (c) a rice cooker (d) a tube light
15. 15.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
16. 16.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
17. 17.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a paper strip. Does the bulb glow? (a) No (b) Yes
18. 18.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) Yes (b) No
19. 19.🔘 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
20. 20.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
21. 21.True or false: to keep drinks far away is not safe. (a) True (b) False
22. 22.🔌 A gap of dry air between two wires acts as … (a) an insulator (b) a cell (c) a conductor (d) a switch that is ON
23. 23.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) straight lines (c) little stars (d) wavy lines
24. 24.⚡ A solar panel changes which kind of energy into electricity? (a) light energy (b) sound energy (c) chemical energy (d) wind energy
25. 25.🔘 A bulb and a cell are joined through 5 switches on 5 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
26. 26.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
27. 27.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
28. 28.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
29. 29.🔍 Which is the odd one out? (a) poke things in a socket (b) touch a switch when wet (c) throw cells in a fire (d) fly kites in open fields
30. 30.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
31. 31.Which of these means the circuit is closed? (a) the switch is ON (b) a wire has come loose (c) a cell is taken out (d) the bulb is unscrewed
32. 32.⚡ What does a water heater mainly change electricity into? (a) sound (b) movement (c) light (d) heat
33. 33.🔋 A 6 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
34. 34.Which of these mainly gives out light? (a) a water heater (b) a rice cooker (c) an electric kettle (d) a street light
35. 35.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
36. 36.True or false: an LED lamp mainly gives out heat. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) a torch (b) a night lamp (c) a traffic signal (d) a toaster
38. 38.Which of these is safe? (a) use mains for a project (b) use small battery cells (c) fly a kite near wires (d) poke things in a socket
39. 39.Which of these gives us electricity? (a) a television (b) a washing machine (c) a computer (d) a bicycle dynamo
40. 40.What does a reed switch do? (a) slides side to side (b) closes when tipped over (c) works only while pressed (d) closes near a magnet

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