Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 352 · 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 is the odd one out? (a) an iron nail (b) a steel coin (c) a rubber eraser (d) a steel spoon
2. 2.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a switch that is ON (c) an insulator (d) a conductor
3. 3.🔋 What should you do with used-up cells? (a) give them for recycling (b) bury them in soil (c) throw them in a fire (d) cut them open
4. 4.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
5. 5.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) to save copper only (d) each gets full voltage
6. 6.💡 5 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. How many bulbs glow?
7. 7.True or false: a toggle switch stays where you flip it. (a) True (b) False
8. 8.Which of these mainly makes sound? (a) a loudspeaker (b) a traffic signal (c) a room heater (d) a mixer grinder
9. 9.Which of these mainly makes movement? (a) a mixer grinder (b) an electric iron (c) a doorbell (d) a siren
10. 10.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
11. 11.⚡ What does an electric drill mainly change electricity into? (a) heat (b) movement (c) light (d) sound
12. 12.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) water makes it cold (c) water carries current (d) it is just untidy
13. 13.Which drawing is the symbol for a motor? (a) a circle with M inside (b) triangle, bar and arrows (c) a circle with a cross (d) a small empty box
14. 14.Which of these mainly makes movement? (a) a siren (b) a rice cooker (c) a buzzer (d) a table fan
15. 15.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
16. 16.🔋 Does a computer give electricity or use electricity? (a) gives electricity (b) uses electricity
17. 17.💡 5 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
18. 18.🔘 Which kind of switch slides side to side? (a) a toggle switch (b) a reed switch (c) a push button (d) a slide switch
19. 19.🔍 Which is the odd one out? (a) a paper strip (b) a brass key (c) a copper wire (d) a graphite rod
20. 20.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) plastic is a conductor (c) to make them heavy (d) plastic makes current
21. 21.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they explode (c) they all go out (d) they get dimmer
22. 22.Which of these is not safe? (a) take cells out after use (b) build with an adult near (c) use small battery cells (d) use mains for a project
23. 23.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
24. 24.Which of these is true of a series circuit? (a) one out, the rest glow (b) many paths for current (c) bulbs share the voltage (d) own switch for each bulb
25. 25.🔋 3 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
26. 26.💡 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?
27. 27.⚡ What does an LED lamp mainly change electricity into? (a) heat (b) light (c) sound (d) movement
28. 28.Which of these means the circuit is closed? (a) a cell is taken out (b) all wires are joined (c) the switch is OFF (d) a wire is cut
29. 29.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) False (b) True
30. 30.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
31. 31.Which of these uses electricity? (a) a cell (b) a wind turbine (c) a generator (d) a refrigerator
32. 32.Which of these means the circuit is closed? (a) a wire is cut (b) a wire has come loose (c) the loop is complete (d) the bulb is unscrewed
33. 33.🔍 Which is the odd one out? (a) touch a switch when wet (b) fly kites in open fields (c) open a phone charger (d) use mains for a project
34. 34.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
35. 35.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) a wire has come loose (d) all wires are joined
36. 36.🔍 Which is the odd one out? (a) a tube light (b) a torch (c) a mixer grinder (d) a traffic signal
37. 37.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) in parallel (c) not joined (d) by Wi-Fi
38. 38.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) an open circuit (c) a series circuit (d) a closed circuit
39. 39.Which of these is true of a series circuit? (a) a single current path (b) each gets the full volts (c) own switch for each bulb (d) many paths for current
40. 40.True or false: “many paths for current” is true of a series circuit. (a) False (b) True

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