Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 276 · 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.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) voltmeter (b) junction (c) cell (d) resistor
2. 2.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
3. 3.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
4. 4.🔦 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 woollen thread. Does the bulb glow? (a) Yes (b) No
5. 5.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in series (d) in parallel
6. 6.True or false: if a wire has come loose, the circuit is open and no current flows. (a) True (b) False
7. 7.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
8. 8.True or false: a siren mainly gives out heat. (a) True (b) False
9. 9.🔌 Which metal is used for most electric wires at home? (a) rubber (b) glass (c) copper (d) plastic
10. 10.Which of these is safe? (a) fly a kite near wires (b) throw cells in a fire (c) poke things in a socket (d) build with an adult near
11. 11.True or false: two or more cell symbols is the symbol for an LED. (a) False (b) True
12. 12.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a trusted adult (c) a younger child (d) a stranger online
13. 13.⚡ What does an electric iron mainly change electricity into? (a) light (b) movement (c) sound (d) heat
14. 14.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) one out, the rest glow (c) a single current path (d) bulbs share the voltage
15. 15.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a wall socket (c) a small battery pack (d) a mains extension board
16. 16.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
17. 17.True or false: a push button works only while pressed. (a) True (b) False
18. 18.True or false: to build with an adult near is not safe. (a) True (b) False
19. 19.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
20. 20.💡 3 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. How many bulbs glow?
21. 21.Which of these is a conductor? (a) a cotton thread (b) aluminium foil (c) a woollen thread (d) a ceramic cup
22. 22.💡 6 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?
23. 23.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is a conductor (c) to make them heavy (d) plastic is an insulator
24. 24.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
25. 25.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) water makes it cold (c) it is just untidy (d) it spoils the paint
26. 26.True or false: a straight line is the symbol for a diode. (a) True (b) False
27. 27.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) LED (b) wire (c) capacitor (d) ammeter
28. 28.💡 4 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
29. 29.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
30. 30.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
31. 31.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) capacitor (b) switch (c) diode (d) voltmeter
32. 32.🔘 Which kind of switch flips up or down? (a) a tilt switch (b) a slide switch (c) a push button (d) a toggle switch
33. 33.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
34. 34.Which drawing is the symbol for a voltmeter? (a) a small empty box (b) a circle with V inside (c) one tall, one short bar (d) triangle, bar and arrows
35. 35.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) bulb (b) battery (c) cell (d) resistor
36. 36.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) half the voltage (c) no voltage (d) double the voltage
37. 37.Which of these is not safe? (a) dry your hands first (b) build with an adult near (c) fly kites in open fields (d) use a cable with cuts
38. 38.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a switch that is ON (c) a cell (d) an insulator
39. 39.🔍 Which is the odd one out? (a) a safety pin (b) a plastic ruler (c) a glass marble (d) a rubber band
40. 40.Which of these is not safe? (a) use small battery cells (b) stay away from pylons (c) dry your hands first (d) touch a switch when wet

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