Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 995 · 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.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
2. 2.What does a toggle switch do? (a) flips up or down (b) closes near a magnet (c) closes when tipped over (d) slides side to side
3. 3.🔦 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) Yes (b) No
4. 4.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) straight lines (c) dotted circles (d) little stars
5. 5.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) both lines (c) the longer line (d) the shorter line
6. 6.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) quick and clear for all (c) to hide the circuit (d) to make it colourful
7. 7.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) to make them heavy (c) plastic is an insulator (d) plastic is a conductor
8. 8.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
9. 9.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
10. 10.True or false: a circle with a cross is the symbol for a bulb. (a) False (b) True
11. 11.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. Does bulb 3 glow? (a) Yes (b) No
12. 12.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a plug top (c) a bulb (d) a long wire
13. 13.Which of these means the circuit is open? (a) a wire has come loose (b) the loop is complete (c) the switch is ON (d) all wires are joined
14. 14.🔍 Which is the odd one out? (a) take cells out after use (b) stop if a part gets hot (c) use mains for a project (d) use small battery cells
15. 15.Which of these is true of a series circuit? (a) own switch for each bulb (b) bulbs share the voltage (c) many paths for current (d) used in house wiring
16. 16.🔍 Which is the odd one out? (a) an iron nail (b) a plastic ruler (c) a copper wire (d) a steel coin
17. 17.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) by Wi-Fi (d) in series
18. 18.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
19. 19.Which of these is an insulator? (a) a woollen thread (b) a copper wire (c) a steel coin (d) a steel spoon
20. 20.🔋 How many 3 V cells must be joined in series to give 15 V?
21. 21.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
22. 22.🔍 Which is the odd one out? (a) a tube light (b) a loudspeaker (c) a torch (d) a traffic signal
23. 23.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
24. 24.Which of these is a conductor? (a) a cotton thread (b) a glass marble (c) a copper wire (d) a ceramic cup
25. 25.True or false: a push button springs back when let go. (a) True (b) False
26. 26.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) the switch is OFF (c) a wire has come loose (d) all wires are joined
27. 27.🔘 Which kind of switch stays where you flip it? (a) a push button (b) a toggle switch (c) a tilt switch (d) a reed switch
28. 28.Which drawing is the symbol for a cell? (a) one tall, one short bar (b) triangle against a bar (c) a line lifted at a gap (d) a circle with V inside
29. 29.🔋 How many 1.2 V cells must be joined in series to give 3.6 V?
30. 30.True or false: a graphite rod is a conductor. (a) False (b) True
31. 31.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
32. 32.Which of these is a conductor? (a) a steel spoon (b) a rubber eraser (c) a dry cork (d) a plastic straw
33. 33.Which of these gives us electricity? (a) a television (b) a water pump (c) a mobile phone (d) a solar panel
34. 34.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a copper wire across the gap. Does the bulb glow? (a) No (b) Yes
35. 35.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
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 OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
37. 37.⚠️ 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
38. 38.Which of these is an insulator? (a) a steel spoon (b) a rubber eraser (c) a graphite rod (d) a safety pin
39. 39.🔘 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 OFF and C is ON. Does the bulb glow? (a) No (b) Yes
40. 40.🔋 How many 2 V cells must be joined in series to give 10 V?

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids