Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 149 · 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.Which drawing is the symbol for an ammeter? (a) a plain rectangle (b) two equal parallel lines (c) a circle with A inside (d) triangle, bar and arrows
2. 2.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) by Wi-Fi (c) in parallel (d) in series
3. 3.What does a reed switch do? (a) closes near a magnet (b) stays where you flip it (c) closes when tipped over (d) springs back when let go
4. 4.⚡ What does a water heater mainly change electricity into? (a) movement (b) sound (c) heat (d) light
5. 5.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) no voltage (c) the same voltage (d) a smaller voltage
6. 6.True or false: to stay away from pylons is not safe. (a) True (b) False
7. 7.🔋 What should you do with used-up cells? (a) bury them in soil (b) throw them in a fire (c) cut them open (d) give them for recycling
8. 8.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) plastic is an insulator (c) to make them heavy (d) plastic makes current
9. 9.True or false: a metal paper clip is a conductor. (a) False (b) True
10. 10.🔋 Does a solar panel give electricity or use electricity? (a) uses electricity (b) gives electricity
11. 11.🔦 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 an iron nail. Does the bulb glow? (a) Yes (b) No
12. 12.🔍 Which is the odd one out? (a) climb an electric pole (b) open a phone charger (c) poke things in a socket (d) stop if a part gets hot
13. 13.Which drawing is the symbol for a motor? (a) a circle with M inside (b) many long-short pairs (c) a circle with an X in it (d) two or more cell symbols
14. 14.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) pour water on them (c) wait and watch (d) shout for an adult
15. 15.True or false: a circle with A inside is the symbol for a motor. (a) False (b) True
16. 16.⚡ A solar panel changes which kind of energy into electricity? (a) chemical energy (b) wind energy (c) sound energy (d) light energy
17. 17.Which of these means the circuit is open? (a) the loop is complete (b) the switch is OFF (c) all wires are joined (d) the switch is ON
18. 18.🔋 How many 1.2 V cells must be joined in series to give 6 V?
19. 19.🔦 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
20. 20.💡 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) the same (c) brighter
21. 21.⚡ What does a ceiling fan mainly change electricity into? (a) heat (b) sound (c) movement (d) light
22. 22.💡 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
23. 23.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) ammeter (b) bulb (c) battery (d) diode
24. 24.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
25. 25.⚡ What does an electric iron mainly change electricity into? (a) light (b) sound (c) heat (d) movement
26. 26.Which of these is not safe? (a) fly kites in open fields (b) stop if a part gets hot (c) poke things in a socket (d) keep drinks far away
27. 27.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
28. 28.🔌 Is a metal paper clip a conductor or an insulator? (a) a conductor (b) an insulator
29. 29.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) a magnet (c) friction (d) electric current
30. 30.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
31. 31.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
32. 32.💡 4 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
33. 33.Which of these is a conductor? (a) a glass marble (b) a wooden stick (c) a brass key (d) a dry cork
34. 34.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
35. 35.Which of these means the circuit is closed? (a) a cell is taken out (b) the bulb is unscrewed (c) a wire is cut (d) all wires are joined
36. 36.🔘 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 OFF and C is ON. Does the bulb glow? (a) Yes (b) No
37. 37.💡 4 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
38. 38.🔘 Which kind of switch works only while pressed? (a) a reed switch (b) a toggle switch (c) a tilt switch (d) a push button
39. 39.Which of these is an insulator? (a) a safety pin (b) a steel spoon (c) a dry cork (d) a steel coin
40. 40.🔍 Which is the odd one out? (a) climb an electric pole (b) touch a switch when wet (c) fly a kite near wires (d) build with an adult near

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