Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 777 · 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.🔘 When a switch is ON, the circuit is … (a) cut (b) open (c) broken (d) closed
2. 2.🔋 What is a battery? (a) two or more cells joined (b) a switch with a lid (c) one single wire (d) a kind of bulb
3. 3.🔍 Which is the odd one out? (a) throw cells in a fire (b) use mains for a project (c) poke things in a socket (d) keep drinks far away
4. 4.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the base (c) the glass (d) the filament
5. 5.Which of these is true of a series circuit? (a) used in house wiring (b) a break stops every bulb (c) own switch for each bulb (d) many paths for current
6. 6.Which of these means the circuit is open? (a) all wires are joined (b) the bulb is unscrewed (c) the switch is ON (d) the loop is complete
7. 7.🔋 6 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
8. 8.💡 3 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?
9. 9.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) no voltage (c) the same voltage (d) half the voltage
10. 10.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
11. 11.🔋 What should you do with used-up cells? (a) cut them open (b) give them for recycling (c) bury them in soil (d) throw them in a fire
12. 12.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
13. 13.True or false: two equal parallel lines is the symbol for a capacitor. (a) True (b) False
14. 14.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
15. 15.⚡ What does a mixer grinder mainly change electricity into? (a) heat (b) movement (c) sound (d) light
16. 16.Which of these is a conductor? (a) a glass marble (b) a plastic ruler (c) a steel spoon (d) a rubber band
17. 17.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) by Wi-Fi (d) in series
18. 18.Which of these is a conductor? (a) a cotton thread (b) a wooden stick (c) a plastic ruler (d) a copper wire
19. 19.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
20. 20.Which of these is a conductor? (a) a rubber band (b) a paper strip (c) a glass marble (d) aluminium foil
21. 21.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a cotton thread. Does the bulb glow? (a) No (b) Yes
22. 22.🔍 Which is the odd one out? (a) a steel spoon (b) a rubber eraser (c) a graphite rod (d) a safety pin
23. 23.🔦 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 aluminium foil. Does the bulb glow? (a) No (b) Yes
24. 24.⚡ What does a doorbell mainly change electricity into? (a) movement (b) heat (c) light (d) sound
25. 25.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
26. 26.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a steel spoon. Does the bulb glow? (a) No (b) Yes
27. 27.🔁 What must there be for a current to flow? (a) a plastic gap (b) one loose end (c) a complete loop (d) a broken path
28. 28.What does a tilt switch do? (a) closes when tipped over (b) closes near a magnet (c) works only while pressed (d) stays where you flip it
29. 29.True or false: one tall, one short bar is the symbol for a battery. (a) False (b) True
30. 30.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to make bulbs dim (d) to save copper only
31. 31.🔦 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 dry cork. Does the bulb glow? (a) Yes (b) No
32. 32.⚠️ Is it safe to stop if a part gets hot? (a) not safe (b) safe
33. 33.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they explode (d) they all go out
34. 34.True or false: a street light mainly gives out light. (a) True (b) False
35. 35.🔘 What does a switch do in a circuit? (a) changes the voltage (b) opens or closes the loop (c) stores current (d) makes electricity
36. 36.🔦 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 rubber band. Does the bulb glow? (a) Yes (b) No
37. 37.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
38. 38.Which drawing is the symbol for a cell? (a) a plain rectangle (b) two equal parallel lines (c) a long and a short line (d) a circle with A inside
39. 39.🔋 Does a battery give electricity or use electricity? (a) gives electricity (b) uses electricity
40. 40.💡 A battery lights 4 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

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