Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 587 · 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.🔁 What must there be for a current to flow? (a) a broken path (b) one loose end (c) a complete loop (d) a plastic gap
2. 2.⚡ What does a buzzer mainly change electricity into? (a) movement (b) sound (c) heat (d) light
3. 3.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
4. 4.🔋 4 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
5. 5.🔘 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) Yes (b) No
6. 6.What does a tilt switch do? (a) flips up or down (b) closes when tipped over (c) stays where you flip it (d) slides side to side
7. 7.Which of these mainly gives out heat? (a) an electric kettle (b) an exhaust fan (c) a torch (d) a table fan
8. 8.True or false: if a wire has come loose, the circuit is closed and current flows. (a) False (b) True
9. 9.🔘 What does a switch do in a circuit? (a) makes electricity (b) changes the voltage (c) stores current (d) opens or closes the loop
10. 10.🔍 Which is the odd one out? (a) a wooden stick (b) a graphite rod (c) a dry cork (d) a plastic straw
11. 11.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
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 ceramic cup. Does the bulb glow? (a) No (b) Yes
13. 13.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 230 V (c) 1.5 V (d) 12 V
14. 14.🔍 Which is the odd one out? (a) poke things in a socket (b) use small battery cells (c) stop if a part gets hot (d) dry your hands first
15. 15.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) water drops (c) dust particles (d) electrons
16. 16.True or false: one tall, one short bar is the symbol for a cell. (a) False (b) True
17. 17.True or false: a circle with an X in it is the symbol for a bulb. (a) True (b) False
18. 18.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) No (b) Yes
19. 19.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a plug top (c) a long wire (d) a bulb
20. 20.🔋 Does a mobile phone give electricity or use electricity? (a) gives electricity (b) uses electricity
21. 21.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
22. 22.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
23. 23.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
24. 24.True or false: if all wires are joined, the circuit is open and no current flows. (a) False (b) True
25. 25.True or false: a steel spoon is an insulator. (a) False (b) True
26. 26.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
27. 27.🔦 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) Yes (b) No
28. 28.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
29. 29.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity
30. 30.🔌 Which metal is used for most electric wires at home? (a) rubber (b) plastic (c) copper (d) glass
31. 31.Which drawing is the symbol for a cell? (a) a circle with A inside (b) a circle with a cross (c) many long-short pairs (d) one tall, one short bar
32. 32.Which of these is not safe? (a) fly kites in open fields (b) stop if a part gets hot (c) use small battery cells (d) use a cable with cuts
33. 33.True or false: to fly kites in open fields is safe. (a) False (b) True
34. 34.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
35. 35.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
36. 36.💡 6 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?
37. 37.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
38. 38.Which of these mainly makes sound? (a) a siren (b) a torch (c) a tube light (d) a street light
39. 39.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) switch (b) resistor (c) LED (d) capacitor
40. 40.🔘 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 ON. Does the bulb glow? (a) No (b) Yes

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