Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 93 · 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.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
2. 2.What does a tilt switch do? (a) flips up or down (b) closes near a magnet (c) stays where you flip it (d) closes when tipped over
3. 3.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
4. 4.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) a full circuit (c) a closed circuit (d) an open circuit
5. 5.Which of these is an insulator? (a) an iron nail (b) a steel coin (c) aluminium foil (d) a ceramic cup
6. 6.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) both lines (c) the longer line (d) the shorter line
7. 7.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) used in house wiring (d) a single current path
8. 8.True or false: to throw cells in a fire is not safe. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) an electric iron (b) a torch (c) a room heater (d) a rice cooker
10. 10.🔋 8 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
11. 11.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the filament (c) the switch (d) the glass
12. 12.Which of these gives us electricity? (a) a water pump (b) a power station (c) a mobile phone (d) a washing machine
13. 13.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) straight lines (d) little stars
14. 14.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) none (d) one
15. 15.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
16. 16.🔦 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 plastic straw. Does the bulb glow? (a) Yes (b) No
17. 17.🔍 Which is the odd one out? (a) build with an adult near (b) dry your hands first (c) keep drinks far away (d) use mains for a project
18. 18.True or false: to touch a switch when wet is safe. (a) True (b) False
19. 19.Which of these is not safe? (a) touch a switch when wet (b) use small battery cells (c) take cells out after use (d) stop if a part gets hot
20. 20.Which of these is a conductor? (a) a wooden stick (b) a graphite rod (c) a ceramic cup (d) a paper strip
21. 21.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
22. 22.Which drawing is the symbol for an LED? (a) triangle, bar and arrows (b) a long and a short line (c) a plain rectangle (d) triangle against a bar
23. 23.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in series (c) not joined (d) in parallel
24. 24.Which drawing is the symbol for a motor? (a) a circle with M inside (b) a circle with V inside (c) two or more cell symbols (d) a circle with A inside
25. 25.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) capacitor (b) cell (c) wire (d) battery
26. 26.True or false: to stay away from pylons is not safe. (a) False (b) True
27. 27.🔘 Which kind of switch closes when tipped over? (a) a slide switch (b) a tilt switch (c) a push button (d) a reed switch
28. 28.🔦 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 eraser. Does the bulb glow? (a) No (b) Yes
29. 29.True or false: a doorbell mainly makes sound. (a) True (b) False
30. 30.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
31. 31.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
32. 32.True or false: an iron nail is a conductor. (a) False (b) True
33. 33.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
34. 34.💡 3 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
35. 35.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a woollen thread across the gap. Does the bulb glow? (a) No (b) Yes
36. 36.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they all go out (d) they get dimmer
37. 37.True or false: to use mains for a project is not safe. (a) False (b) True
38. 38.🔦 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 metal paper clip. Does the bulb glow? (a) No (b) Yes
39. 39.⚡ What does a toaster mainly change electricity into? (a) heat (b) light (c) sound (d) movement
40. 40.What does a push button do? (a) slides side to side (b) springs back when let go (c) closes when tipped over (d) stays where you flip it

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