Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 905 · 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.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
2. 2.🔋 2 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
3. 3.🔋 2 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
4. 4.Which drawing is the symbol for a switch? (a) two equal parallel lines (b) a line lifted at a gap (c) a straight line (d) one tall, one short bar
5. 5.💡 4 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. Bulbs 1 and 3 are taken out of their holders. How many bulbs glow?
6. 6.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
7. 7.True or false: a tilt switch closes when tipped over. (a) False (b) True
8. 8.True or false: to fly a kite near wires is safe. (a) False (b) True
9. 9.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
10. 10.Which of these is not safe? (a) use small battery cells (b) fly kites in open fields (c) open a phone charger (d) stop if a part gets hot
11. 11.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) capacitor (b) voltmeter (c) resistor (d) cell
12. 12.What does a toggle switch do? (a) stays where you flip it (b) slides side to side (c) closes when tipped over (d) works only while pressed
13. 13.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
14. 14.⚡ What does a mixer grinder mainly change electricity into? (a) heat (b) sound (c) light (d) movement
15. 15.Which of these means the circuit is open? (a) the switch is OFF (b) all wires are joined (c) the loop is complete (d) the switch is ON
16. 16.🔘 Which kind of switch slides side to side? (a) a toggle switch (b) a reed switch (c) a slide switch (d) a push button
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 plastic straw. Does the bulb glow? (a) No (b) Yes
18. 18.💡 5 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. How many bulbs glow?
19. 19.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) motor (b) battery (c) diode (d) voltmeter
20. 20.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
21. 21.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the base (c) the switch (d) the filament
22. 22.🔋 3 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
23. 23.Which of these mainly gives out light? (a) a doorbell (b) a night lamp (c) an exhaust fan (d) a loudspeaker
24. 24.Which of these means the circuit is closed? (a) the loop is complete (b) a cell is taken out (c) the bulb is unscrewed (d) a wire has come loose
25. 25.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
26. 26.True or false: a toggle switch flips up or down. (a) True (b) False
27. 27.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) motor (b) diode (c) battery (d) voltmeter
28. 28.True or false: a circle with M inside is the symbol for a wire. (a) True (b) False
29. 29.💡 4 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?
30. 30.🔌 Which metal is used for most electric wires at home? (a) copper (b) rubber (c) plastic (d) glass
31. 31.True or false: to touch a switch when wet is safe. (a) False (b) True
32. 32.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) dust particles (c) water drops (d) photons
33. 33.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) not joined (c) by Wi-Fi (d) in parallel
34. 34.True or false: “a single current path” is true of a series circuit. (a) False (b) True
35. 35.Which of these mainly makes movement? (a) a toaster (b) a street light (c) a tube light (d) an electric toy car
36. 36.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
37. 37.🔋 Does a bicycle dynamo give electricity or use electricity? (a) gives electricity (b) uses electricity
38. 38.Which of these is a conductor? (a) aluminium foil (b) a rubber eraser (c) a plastic ruler (d) a woollen thread
39. 39.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
40. 40.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they explode (d) they get dimmer

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