Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 302 · 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.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
2. 2.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) so all go off together (d) each gets full voltage
3. 3.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
4. 4.True or false: a slide switch slides side to side. (a) False (b) True
5. 5.True or false: a line lifted at a gap is the symbol for a switch. (a) False (b) True
6. 6.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) by Wi-Fi (c) in series (d) in parallel
7. 7.Which drawing is the symbol for a cell? (a) a dot where wires meet (b) a long and a short line (c) a circle with an X in it (d) a plain rectangle
8. 8.🔍 Which is the odd one out? (a) an electric toy car (b) an exhaust fan (c) a table fan (d) a school bell
9. 9.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pour water on them (b) shout for an adult (c) pull them by the hand (d) wait and watch
10. 10.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
11. 11.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
12. 12.🔍 Which is the odd one out? (a) a safety pin (b) a cotton thread (c) a rubber eraser (d) a plastic ruler
13. 13.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
14. 14.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
15. 15.What does a push button do? (a) flips up or down (b) stays where you flip it (c) springs back when let go (d) closes near a magnet
16. 16.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) neither line (c) the longer line (d) the shorter line
17. 17.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
18. 18.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 1 glow? (a) Yes (b) No
19. 19.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) switch (b) battery (c) cell (d) junction
20. 20.True or false: an exhaust fan mainly makes sound. (a) False (b) True
21. 21.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
22. 22.True or false: triangle, bar and arrows is the symbol for an LED. (a) False (b) True
23. 23.🔘 A bulb and a cell are joined through 6 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
24. 24.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) No (b) Yes
25. 25.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
26. 26.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
27. 27.Which drawing is the symbol for a wire? (a) triangle against a bar (b) two equal parallel lines (c) a straight line (d) a circle with V inside
28. 28.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
29. 29.Which of these means the circuit is closed? (a) the loop is complete (b) the bulb is unscrewed (c) a wire is cut (d) the switch is OFF
30. 30.🔍 Which is the odd one out? (a) throw cells in a fire (b) poke things in a socket (c) keep drinks far away (d) touch a switch when wet
31. 31.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
32. 32.Which of these mainly makes sound? (a) a mixer grinder (b) an LED lamp (c) an electric toy car (d) a buzzer
33. 33.Which of these is a conductor? (a) a graphite rod (b) a rubber eraser (c) a dry cork (d) a glass marble
34. 34.🔍 Which is the odd one out? (a) keep drinks far away (b) stop if a part gets hot (c) build with an adult near (d) fly a kite near wires
35. 35.🔍 Which is the odd one out? (a) a steel coin (b) a steel spoon (c) a woollen thread (d) a metal paper clip
36. 36.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
37. 37.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
38. 38.⚡ What does an exhaust fan mainly change electricity into? (a) light (b) sound (c) movement (d) heat
39. 39.🔦 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) Yes (b) No
40. 40.⚡ A fan changes electrical energy mainly into which kind of energy? (a) movement energy (b) chemical energy (c) light energy (d) sound energy

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