Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 691 · 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.True or false: a brass key is a conductor. (a) False (b) True
2. 2.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
3. 3.True or false: to touch a switch when wet is safe. (a) False (b) True
4. 4.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) none (c) both of them (d) only one
5. 5.🔘 Which kind of switch stays where you flip it? (a) a push button (b) a toggle switch (c) a tilt switch (d) a reed switch
6. 6.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in parallel (c) in series (d) not joined
7. 7.Which drawing is the symbol for an LED? (a) triangle against a bar (b) two or more cell symbols (c) a line lifted at a gap (d) triangle, bar and arrows
8. 8.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
9. 9.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
10. 10.True or false: to fly a kite near wires is safe. (a) True (b) False
11. 11.Which of these mainly gives out heat? (a) a school bell (b) a street light (c) a siren (d) an electric iron
12. 12.Which of these is a conductor? (a) an iron nail (b) a ceramic cup (c) a cotton thread (d) a paper strip
13. 13.Which of these is true of a series circuit? (a) many paths for current (b) own switch for each bulb (c) used in house wiring (d) one bulb out, all go out
14. 14.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) use small battery cells (b) fly kites in open fields (c) dry your hands first (d) fly a kite near wires
16. 16.🔋 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)? =
17. 17.🔦 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 a paper strip. Does the bulb glow? (a) Yes (b) No
18. 18.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they all go out (d) they explode
19. 19.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
20. 20.🔍 Which is the odd one out? (a) a mixer grinder (b) a room heater (c) a water heater (d) a toaster
21. 21.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) quick and clear for all (c) to make it colourful (d) to hide the circuit
22. 22.💡 A battery lights 3 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
23. 23.Which of these is true of a series circuit? (a) one out, the rest glow (b) bulbs share the voltage (c) own switch for each bulb (d) many paths for current
24. 24.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) many paths for current (d) a single current path
25. 25.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) motor (b) cell (c) ammeter (d) bulb
26. 26.🔋 A 3 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
27. 27.Which drawing is the symbol for a capacitor? (a) one tall, one short bar (b) many long-short pairs (c) two equal parallel lines (d) a circle with a cross
28. 28.🔋 4 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
29. 29.Which of these uses electricity? (a) a battery (b) a generator (c) a television (d) a solar panel
30. 30.True or false: a paper strip is an insulator. (a) False (b) True
31. 31.🔋 2 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
32. 32.🔍 Which is the odd one out? (a) a cotton thread (b) a steel coin (c) a graphite rod (d) a safety pin
33. 33.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
34. 34.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
35. 35.Which of these mainly makes movement? (a) a tube light (b) a street light (c) an exhaust fan (d) a room heater
36. 36.🔋 What should you do with used-up cells? (a) bury them in soil (b) give them for recycling (c) throw them in a fire (d) cut them open
37. 37.⚡ What does a buzzer mainly change electricity into? (a) heat (b) light (c) sound (d) movement
38. 38.⚡ What does a doorbell mainly change electricity into? (a) sound (b) heat (c) light (d) movement
39. 39.True or false: a line lifted at a gap is the symbol for an LED. (a) True (b) False
40. 40.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True

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