Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 848 · 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 does a toaster mainly change electricity into? (a) light (b) sound (c) movement (d) heat
2. 2.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) electrical energy (c) nuclear energy (d) wind energy
3. 3.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) wavy lines (c) little stars (d) dotted circles
4. 4.💡 3 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
5. 5.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
6. 6.Which of these is true of a series circuit? (a) one out, the rest glow (b) bulbs share the voltage (c) own switch for each bulb (d) many paths for current
7. 7.Which of these is an insulator? (a) a steel spoon (b) a brass key (c) a plastic ruler (d) an iron nail
8. 8.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a copper wire. Does the bulb glow? (a) Yes (b) No
9. 9.True or false: “a single current path” is true of a series circuit. (a) False (b) True
10. 10.🔘 Which kind of switch flips up or down? (a) a slide switch (b) a tilt switch (c) a reed switch (d) a toggle switch
11. 11.Which of these means the circuit is closed? (a) a wire is cut (b) a cell is taken out (c) the switch is ON (d) the switch is OFF
12. 12.🔍 Which is the odd one out? (a) build with an adult near (b) take cells out after use (c) stop if a part gets hot (d) poke things in a socket
13. 13.Which of these mainly gives out light? (a) a doorbell (b) an electric toy car (c) an electric drill (d) a torch
14. 14.💡 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?
15. 15.Which of these mainly makes sound? (a) a siren (b) an exhaust fan (c) a ceiling fan (d) a street light
16. 16.⚠️ Is it safe to throw cells in a fire? (a) safe (b) not safe
17. 17.🔋 A 12 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
18. 18.Which drawing is the symbol for a voltmeter? (a) many long-short pairs (b) a line lifted at a gap (c) a circle with V inside (d) a circle with a cross
19. 19.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
20. 20.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
21. 21.True or false: a push button works only while pressed. (a) False (b) True
22. 22.Which of these mainly gives out heat? (a) an exhaust fan (b) a ceiling fan (c) a torch (d) a toaster
23. 23.🔘 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
24. 24.🔋 5 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)? =
25. 25.Which of these is an insulator? (a) a brass key (b) a safety pin (c) aluminium foil (d) a cotton thread
26. 26.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
27. 27.Which of these uses electricity? (a) a generator (b) a cell (c) a computer (d) a wind turbine
28. 28.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a long wire (c) a plug top (d) a bulb
29. 29.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they explode (d) they all go out
30. 30.🔌 Is a ceramic cup a conductor or an insulator? (a) an insulator (b) a conductor
31. 31.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
32. 32.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
33. 33.⚡ What does an electric toy car mainly change electricity into? (a) sound (b) movement (c) light (d) heat
34. 34.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) Yes (b) No
35. 35.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) quick and clear for all (c) symbols are heavier (d) to hide the circuit
36. 36.True or false: to use mains for a project is not safe. (a) True (b) False
37. 37.⚡ What does a water heater mainly change electricity into? (a) heat (b) sound (c) light (d) movement
38. 38.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) Yes (b) No
39. 39.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 1.5 V (c) 12 V (d) 9 V
40. 40.Which of these is a conductor? (a) a rubber eraser (b) a plastic ruler (c) a steel coin (d) a rubber band

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