Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 637 · 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.💡 2 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
2. 2.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) Yes (b) No
3. 3.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
4. 4.💡 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. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
5. 5.Which drawing is the symbol for a diode? (a) a circle with M inside (b) a circle with an X in it (c) a long and a short line (d) triangle against a bar
6. 6.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) the switch is OFF (d) the loop is complete
7. 7.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
8. 8.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
9. 9.🔋 What should you do with used-up cells? (a) throw them in a fire (b) give them for recycling (c) bury them in soil (d) cut them open
10. 10.What does a slide switch do? (a) stays where you flip it (b) slides side to side (c) works only while pressed (d) closes when tipped over
11. 11.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
12. 12.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) No (b) Yes
13. 13.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) electrons (c) dust particles (d) water drops
14. 14.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
15. 15.🔘 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
16. 16.🔦 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 brass key. Does the bulb glow? (a) Yes (b) No
17. 17.🔘 Which kind of switch springs back when let go? (a) a tilt switch (b) a push button (c) a slide switch (d) a reed switch
18. 18.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
19. 19.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is a conductor (c) plastic makes current (d) plastic is an insulator
20. 20.⚡ What does a buzzer mainly change electricity into? (a) movement (b) sound (c) heat (d) light
21. 21.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) No (b) Yes
22. 22.Which of these is safe? (a) fly a kite near wires (b) build with an adult near (c) poke things in a socket (d) throw cells in a fire
23. 23.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to make it colourful (c) quick and clear for all (d) to hide the circuit
24. 24.Which of these is not safe? (a) stop if a part gets hot (b) use small battery cells (c) keep drinks far away (d) throw cells in a fire
25. 25.💡 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
26. 26.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in parallel (c) by Wi-Fi (d) in series
27. 27.True or false: to build with an adult near is not safe. (a) False (b) True
28. 28.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
29. 29.True or false: to use a cable with cuts is safe. (a) False (b) True
30. 30.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) LED (b) battery (c) capacitor (d) resistor
31. 31.🔦 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) No (b) Yes
32. 32.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
33. 33.⚡ A solar panel changes which kind of energy into electricity? (a) chemical energy (b) sound energy (c) wind energy (d) light energy
34. 34.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
35. 35.🔋 What is a battery? (a) a switch with a lid (b) two or more cells joined (c) one single wire (d) a kind of bulb
36. 36.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) No (b) Yes
37. 37.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
38. 38.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
39. 39.Which of these is true of a series circuit? (a) a single current path (b) many paths for current (c) each gets the full volts (d) one out, the rest glow
40. 40.What does a push button do? (a) flips up or down (b) works only while pressed (c) closes when tipped over (d) closes near a magnet

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