Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 470 · 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: if a cell is taken out, the circuit is closed and current flows. (a) True (b) False
2. 2.🔘 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
3. 3.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
4. 4.True or false: a steel spoon is an insulator. (a) False (b) True
5. 5.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a small battery pack (c) a mains extension board (d) an inverter socket
6. 6.Which of these is safe? (a) open a phone charger (b) poke things in a socket (c) stay away from pylons (d) climb an electric pole
7. 7.🔍 Which is the odd one out? (a) a safety pin (b) a plastic ruler (c) a rubber band (d) a paper strip
8. 8.Which drawing is the symbol for a battery? (a) a small empty box (b) a plain rectangle (c) a line lifted at a gap (d) two or more cell symbols
9. 9.⚡ A cell changes stored chemical energy into which kind of energy? (a) nuclear energy (b) electrical energy (c) sound energy (d) wind energy
10. 10.Which of these mainly gives out light? (a) a mixer grinder (b) a room heater (c) a torch (d) a school bell
11. 11.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) switch (b) ammeter (c) junction (d) resistor
12. 12.True or false: a school bell mainly makes sound. (a) False (b) True
13. 13.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) wire (b) diode (c) capacitor (d) ammeter
14. 14.Which of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) used in house wiring (d) one bulb out, all go out
15. 15.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) little stars (c) straight lines (d) dotted circles
16. 16.🔍 Which is the odd one out? (a) a wooden stick (b) a paper strip (c) a rubber band (d) a steel spoon
17. 17.True or false: a siren mainly makes movement. (a) True (b) False
18. 18.Which drawing is the symbol for a capacitor? (a) one tall, one short bar (b) triangle, bar and arrows (c) a dot where wires meet (d) two equal parallel lines
19. 19.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
20. 20.Which drawing is the symbol for an LED? (a) a long and a short line (b) a plain rectangle (c) triangle, bar and arrows (d) two or more cell symbols
21. 21.🔋 What is a battery? (a) a switch with a lid (b) one single wire (c) two or more cells joined (d) a kind of bulb
22. 22.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a tilt switch (c) a push button (d) a reed switch
23. 23.True or false: a toggle switch flips up or down. (a) False (b) True
24. 24.⚡ What does a loudspeaker mainly change electricity into? (a) movement (b) light (c) heat (d) sound
25. 25.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 0.5 V (c) 230 V (d) 1.5 V
26. 26.True or false: a straight line is the symbol for a wire. (a) True (b) False
27. 27.Which of these mainly gives out heat? (a) a tube light (b) an LED lamp (c) an electric kettle (d) a school bell
28. 28.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) many paths for current (d) a single current path
29. 29.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to save copper only (d) to make bulbs dim
30. 30.Which of these mainly gives out heat? (a) an exhaust fan (b) a tube light (c) a torch (d) a rice cooker
31. 31.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
32. 32.🔍 Which is the odd one out? (a) an iron nail (b) a copper wire (c) a rubber eraser (d) a safety pin
33. 33.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
34. 34.🔋 How many 1.2 V cells must be joined in series to give 9.6 V?
35. 35.🔋 3 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)? =
36. 36.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
37. 37.🔍 Which is the odd one out? (a) a doorbell (b) a torch (c) an LED lamp (d) a tube light
38. 38.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a fuse or MCB (c) a bulb (d) a plug top
39. 39.⚡ What does a water heater mainly change electricity into? (a) movement (b) light (c) heat (d) sound
40. 40.🔘 A bulb and a cell are joined through 4 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?

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