Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 689 · 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 is the odd one out? (a) touch a fallen wire (b) use mains for a project (c) dry your hands first (d) fly a kite near wires
2. 2.True or false: to fly kites in open fields is safe. (a) True (b) False
3. 3.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
4. 4.⚡ What does an electric kettle mainly change electricity into? (a) sound (b) heat (c) movement (d) light
5. 5.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) LED (b) capacitor (c) voltmeter (d) ammeter
6. 6.Which of these uses electricity? (a) a cell (b) a solar panel (c) a power station (d) a computer
7. 7.Which of these is a conductor? (a) a wooden stick (b) a steel spoon (c) a cotton thread (d) a ceramic cup
8. 8.🔦 A circuit has a used-up (dead) 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 safety pin. Does the bulb glow? (a) Yes (b) No
9. 9.Which of these is a conductor? (a) a graphite rod (b) a rubber eraser (c) a glass marble (d) a ceramic cup
10. 10.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?
11. 11.🔌 Which metal is used for most electric wires at home? (a) rubber (b) plastic (c) glass (d) copper
12. 12.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
13. 13.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
14. 14.🔘 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 OFF, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
15. 15.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) one bulb out, all go out (d) each gets the full volts
16. 16.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) so all go off together (d) to make bulbs dim
17. 17.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
18. 18.🔍 Which is the odd one out? (a) throw cells in a fire (b) stay away from pylons (c) build with an adult near (d) fly kites in open fields
19. 19.True or false: a slide switch works only while pressed. (a) False (b) True
20. 20.True or false: a circle with V inside is the symbol for a resistor. (a) False (b) True
21. 21.True or false: a slide switch springs back when let go. (a) True (b) False
22. 22.🔘 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 OFF, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
23. 23.Which of these is not safe? (a) keep drinks far away (b) stop if a part gets hot (c) fly a kite near wires (d) dry your hands first
24. 24.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
25. 25.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) switch (b) diode (c) battery (d) bulb
26. 26.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
27. 27.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) quick and clear for all (d) to hide the circuit
28. 28.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the filament (b) the glass (c) the base (d) the switch
29. 29.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a bulb (c) a fuse or MCB (d) a plug top
30. 30.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
31. 31.Which of these is an insulator? (a) aluminium foil (b) a graphite rod (c) a rubber band (d) a steel coin
32. 32.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
33. 33.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
34. 34.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
35. 35.🔦 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 paper strip. Does the bulb glow? (a) No (b) Yes
36. 36.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) all wires are joined (d) the switch is OFF
37. 37.Which of these is not safe? (a) stop if a part gets hot (b) stay away from pylons (c) take cells out after use (d) climb an electric pole
38. 38.🔍 Which is the odd one out? (a) a brass key (b) a plastic ruler (c) a rubber eraser (d) a cotton thread
39. 39.Which of these is a conductor? (a) a rubber band (b) a wooden stick (c) a glass marble (d) a safety pin
40. 40.True or false: to dry your hands first is safe. (a) False (b) True

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