Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 183 · 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.💡 3 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. Bulb 2 is taken out of its holder. How many bulbs glow?
2. 2.True or false: to climb an electric pole is safe. (a) True (b) False
3. 3.True or false: a circle with A inside is the symbol for a diode. (a) False (b) True
4. 4.💡 6 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?
5. 5.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
6. 6.⚡ A fan changes electrical energy mainly into which kind of energy? (a) sound energy (b) light energy (c) movement energy (d) chemical energy
7. 7.🔁 What must there be for a current to flow? (a) a plastic gap (b) a broken path (c) one loose end (d) a complete loop
8. 8.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
9. 9.💡 2 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
10. 10.🔦 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 steel spoon. Does the bulb glow? (a) Yes (b) No
11. 11.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) one (d) two
12. 12.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
13. 13.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
14. 14.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
15. 15.🔍 Which is the odd one out? (a) a school bell (b) a siren (c) a buzzer (d) an electric kettle
16. 16.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
17. 17.🔋 How many 2 V cells must be joined in series to give 16 V?
18. 18.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
19. 19.Which of these mainly makes movement? (a) a traffic signal (b) a water heater (c) an exhaust fan (d) a doorbell
20. 20.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
21. 21.🔘 Which kind of switch slides side to side? (a) a slide switch (b) a push button (c) a toggle switch (d) a tilt switch
22. 22.🔍 Which is the odd one out? (a) a table fan (b) a rice cooker (c) an electric drill (d) a ceiling fan
23. 23.Which of these is an insulator? (a) a steel coin (b) a copper wire (c) a rubber band (d) a steel spoon
24. 24.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 1.5 V (c) 230 V (d) 15 V
25. 25.🔦 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 an iron nail. Does the bulb glow? (a) Yes (b) No
26. 26.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
27. 27.⚡ A cell changes stored chemical energy into which kind of energy? (a) nuclear energy (b) wind energy (c) electrical energy (d) sound energy
28. 28.🔦 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 an iron nail. Does the bulb glow? (a) No (b) Yes
29. 29.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) bulb (b) ammeter (c) battery (d) motor
30. 30.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
31. 31.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 4 glow? (a) No (b) Yes
32. 32.🔍 Which is the odd one out? (a) a wooden stick (b) a rubber band (c) a paper strip (d) a steel coin
33. 33.True or false: two or more cell symbols is the symbol for a voltmeter. (a) True (b) False
34. 34.True or false: a reed switch closes when tipped over. (a) True (b) False
35. 35.True or false: a toggle switch flips up or down. (a) True (b) False
36. 36.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
37. 37.Which of these mainly gives out heat? (a) a school bell (b) a water heater (c) a mixer grinder (d) a tube light
38. 38.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
39. 39.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the shorter line (c) both lines (d) the longer line
40. 40.🔋 8 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =

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