Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 830 · 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 true of a series circuit? (a) own switch for each bulb (b) one bulb out, all go out (c) used in house wiring (d) many paths for current
2. 2.🔌 Is a brass key a conductor or an insulator? (a) a conductor (b) an insulator
3. 3.True or false: a loudspeaker mainly makes sound. (a) False (b) True
4. 4.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) no voltage (c) the same voltage (d) a bigger voltage
5. 5.🔘 When a switch is ON, the circuit is … (a) cut (b) broken (c) open (d) closed
6. 6.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
7. 7.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
8. 8.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
9. 9.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) No (b) Yes
10. 10.🔋 Does a solar panel give electricity or use electricity? (a) gives electricity (b) uses electricity
11. 11.True or false: to open a phone charger is not safe. (a) True (b) False
12. 12.⚠️ Is it safe to climb an electric pole? (a) not safe (b) safe
13. 13.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
14. 14.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) wire (b) switch (c) capacitor (d) voltmeter
15. 15.Which of these mainly makes movement? (a) an electric kettle (b) a school bell (c) a water heater (d) an electric toy car
16. 16.Which of these is not safe? (a) fly kites in open fields (b) build with an adult near (c) touch a fallen wire (d) take cells out after use
17. 17.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
18. 18.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 12 V (c) 230 V (d) 1.5 V
19. 19.What does a push button do? (a) slides side to side (b) closes near a magnet (c) flips up or down (d) springs back when let go
20. 20.💡 5 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 5 is taken out of its holder. Does bulb 3 glow? (a) No (b) Yes
21. 21.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
22. 22.True or false: a night lamp mainly gives out heat. (a) True (b) False
23. 23.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
24. 24.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) LED (b) battery (c) voltmeter (d) switch
25. 25.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water makes it cold (c) it spoils the paint (d) water carries current
26. 26.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) to save copper only (d) so all go off together
27. 27.Which of these is an insulator? (a) aluminium foil (b) a plastic ruler (c) a metal paper clip (d) a graphite rod
28. 28.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is OFF. Does the bulb glow? (a) Yes (b) No
29. 29.Which of these is a conductor? (a) a woollen thread (b) a cotton thread (c) a paper strip (d) a steel coin
30. 30.🔋 A 9 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
31. 31.Which of these means the circuit is open? (a) a cell is taken out (b) the switch is ON (c) the loop is complete (d) all wires are joined
32. 32.🔘 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 ON and C is ON. Does the bulb glow? (a) Yes (b) No
33. 33.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) sound energy (c) chemical energy (d) movement energy
34. 34.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) voltmeter (b) resistor (c) capacitor (d) diode
35. 35.⚡ What does a night lamp mainly change electricity into? (a) sound (b) heat (c) movement (d) light
36. 36.🔍 Which is the odd one out? (a) a doorbell (b) a buzzer (c) an exhaust fan (d) a siren
37. 37.True or false: a rubber band is an insulator. (a) False (b) True
38. 38.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing
39. 39.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) only one (c) both of them (d) none
40. 40.Which of these mainly gives out light? (a) a ceiling fan (b) a buzzer (c) an LED lamp (d) a loudspeaker

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