Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 768 · 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 it safe to use mains for a project? (a) safe (b) not safe
2. 2.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
3. 3.🔍 Which is the odd one out? (a) climb an electric pole (b) dry your hands first (c) stay away from pylons (d) fly kites in open fields
4. 4.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) No (b) Yes
5. 5.🔍 Which is the odd one out? (a) build with an adult near (b) use small battery cells (c) touch a fallen wire (d) stay away from pylons
6. 6.Which drawing is the symbol for a junction? (a) two equal parallel lines (b) a circle with a cross (c) a dot where wires meet (d) a circle with A inside
7. 7.⚡ What does a tube light mainly change electricity into? (a) movement (b) sound (c) light (d) heat
8. 8.🔋 A 3 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
9. 9.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) in parallel (c) not joined (d) by Wi-Fi
10. 10.True or false: “a single current path” is true of a series circuit. (a) False (b) True
11. 11.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
12. 12.🔦 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) No (b) Yes
13. 13.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) shout for an adult (c) pour water on them (d) wait and watch
14. 14.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
15. 15.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) Yes (b) No
16. 16.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
17. 17.⚡ What does a toaster mainly change electricity into? (a) heat (b) sound (c) light (d) movement
18. 18.🔍 Which is the odd one out? (a) a toaster (b) a table fan (c) an electric iron (d) an electric kettle
19. 19.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
20. 20.💡 5 identical bulbs are joined in series with a 10 V battery (ideal wires). How many volts does each bulb get? =
21. 21.Which of these is true of a series circuit? (a) used in house wiring (b) a single current path (c) one out, the rest glow (d) each gets the full volts
22. 22.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
23. 23.Which drawing is the symbol for an ammeter? (a) a circle with A inside (b) two equal parallel lines (c) one tall, one short bar (d) a line lifted at a gap
24. 24.🔋 How many 3 V cells must be joined in series to give 6 V?
25. 25.⚠️ Who should be with you when you build a circuit? (a) a stranger online (b) a trusted adult (c) nobody (d) a younger child
26. 26.True or false: a toggle switch flips up or down. (a) True (b) False
27. 27.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is ON. Does the bulb glow? (a) Yes (b) No
28. 28.🔘 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 ON and C is ON. Does the bulb glow? (a) Yes (b) No
29. 29.Which drawing is the symbol for an LED? (a) triangle, bar and arrows (b) two equal parallel lines (c) a dot where wires meet (d) a plain rectangle
30. 30.Which of these is not safe? (a) stay away from pylons (b) build with an adult near (c) use a cable with cuts (d) dry your hands first
31. 31.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) wire (b) ammeter (c) voltmeter (d) capacitor
32. 32.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) none (d) one for each bulb
33. 33.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
34. 34.🔁 What must there be for a current to flow? (a) a plastic gap (b) a complete loop (c) one loose end (d) a broken path
35. 35.Which of these means the circuit is closed? (a) a wire is cut (b) all wires are joined (c) the switch is OFF (d) a cell is taken out
36. 36.🔍 Which is the odd one out? (a) dry your hands first (b) use small battery cells (c) open a phone charger (d) build with an adult near
37. 37.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) diode (b) motor (c) resistor (d) capacitor
38. 38.True or false: a woollen thread is a conductor. (a) True (b) False
39. 39.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
40. 40.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) straight lines (d) wavy lines

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