Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 243 · 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 means the circuit is closed? (a) a cell is taken out (b) all wires are joined (c) the bulb is unscrewed (d) the switch is OFF
2. 2.💡 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 1 is taken out of its holder. Does bulb 3 glow? (a) No (b) Yes
3. 3.Which of these mainly makes movement? (a) a mixer grinder (b) an electric iron (c) a room heater (d) an electric kettle
4. 4.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
5. 5.Which of these mainly gives out light? (a) a doorbell (b) a school bell (c) an exhaust fan (d) an LED lamp
6. 6.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
7. 7.True or false: to poke things in a socket is safe. (a) True (b) False
8. 8.🔋 What is a battery? (a) one single wire (b) a switch with a lid (c) two or more cells joined (d) a kind of bulb
9. 9.🔍 Which is the odd one out? (a) a brass key (b) a steel spoon (c) an iron nail (d) a glass marble
10. 10.🔍 Which is the odd one out? (a) a siren (b) a doorbell (c) a night lamp (d) a loudspeaker
11. 11.⚡ A solar panel changes which kind of energy into electricity? (a) chemical energy (b) light energy (c) sound energy (d) wind energy
12. 12.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the switch (c) the base (d) the filament
13. 13.🔦 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 plastic straw. Does the bulb glow? (a) Yes (b) No
14. 14.⚡ What does a tube light mainly change electricity into? (a) light (b) movement (c) heat (d) sound
15. 15.Which of these is true of a series circuit? (a) used in house wiring (b) own switch for each bulb (c) one out, the rest glow (d) a break stops every bulb
16. 16.🔘 When a switch is ON, the circuit is … (a) open (b) closed (c) broken (d) cut
17. 17.🔘 A bulb and a cell are joined through 6 switches on 6 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?
18. 18.🔋 7 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)? =
19. 19.Which of these is safe? (a) use mains for a project (b) fly a kite near wires (c) use a cable with cuts (d) take cells out after use
20. 20.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
21. 21.💡 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
22. 22.What does a push button do? (a) closes near a magnet (b) flips up or down (c) slides side to side (d) springs back when let go
23. 23.True or false: if a cell is taken out, the circuit is open and no current flows. (a) True (b) False
24. 24.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) to make bulbs dim (d) so all go off together
25. 25.🔋 What should you do with used-up cells? (a) throw them in a fire (b) cut them open (c) give them for recycling (d) bury them in soil
26. 26.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) voltmeter (b) motor (c) resistor (d) diode
27. 27.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they all go out (c) they get dimmer (d) they explode
28. 28.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) motor (b) diode (c) bulb (d) capacitor
29. 29.🔋 How many 2 V cells must be joined in series to give 10 V?
30. 30.🔍 Which is the odd one out? (a) a rubber band (b) a cotton thread (c) a safety pin (d) a plastic ruler
31. 31.🔋 Does a wind turbine give electricity or use electricity? (a) gives electricity (b) uses electricity
32. 32.💡 2 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 1 is taken out of its holder. How many bulbs glow?
33. 33.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) switch (b) wire (c) voltmeter (d) cell
34. 34.💡 A battery lights 2 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.🔍 Which is the odd one out? (a) an electric iron (b) a torch (c) a traffic signal (d) an LED lamp
36. 36.🔋 6 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)? =
37. 37.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
38. 38.True or false: a table fan mainly makes movement. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) a night lamp (b) a traffic signal (c) a street light (d) a school bell
40. 40.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) friction (c) electric current (d) a magnet

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