Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 256 · 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) a copper wire (b) a brass key (c) an iron nail (d) a woollen thread
2. 2.What does a toggle switch do? (a) slides side to side (b) stays where you flip it (c) works only while pressed (d) springs back when let go
3. 3.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the base (c) the filament (d) the glass
4. 4.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) bulb (b) cell (c) switch (d) battery
5. 5.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) never (c) when both are ON (d) when either is ON
6. 6.Which drawing is the symbol for a junction? (a) a dot where wires meet (b) a straight line (c) a circle with a cross (d) a circle with M inside
7. 7.🔘 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) No (b) Yes
8. 8.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is OFF. Does the bulb glow? (a) Yes (b) No
9. 9.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) little stars (d) straight lines
10. 10.Which of these means the circuit is closed? (a) a wire has come loose (b) the switch is OFF (c) the loop is complete (d) a wire is cut
11. 11.True or false: a paper strip is an insulator. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) use a cable with cuts (b) fly a kite near wires (c) keep drinks far away (d) touch a switch when wet
13. 13.🔦 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) No (b) Yes
14. 14.Which drawing is the symbol for a bulb? (a) a circle with M inside (b) a circle with an X in it (c) a dot where wires meet (d) a circle with A inside
15. 15.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a conductor (c) a switch that is ON (d) an insulator
16. 16.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
17. 17.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
18. 18.Which drawing is the symbol for a voltmeter? (a) many long-short pairs (b) a circle with V inside (c) a circle with an X in it (d) triangle against a bar
19. 19.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) a break stops every bulb (d) each gets the full volts
20. 20.Which of these mainly makes sound? (a) a tube light (b) an exhaust fan (c) a toaster (d) a siren
21. 21.🔘 Which kind of switch closes near a magnet? (a) a push button (b) a tilt switch (c) a reed switch (d) a toggle switch
22. 22.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) one (c) two (d) none
23. 23.⚡ A cell changes stored chemical energy into which kind of energy? (a) wind energy (b) sound energy (c) electrical energy (d) nuclear energy
24. 24.True or false: to throw cells in a fire is safe. (a) True (b) False
25. 25.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
26. 26.🔦 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
27. 27.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) No (b) Yes
28. 28.Which of these is safe? (a) throw cells in a fire (b) use mains for a project (c) take cells out after use (d) open a phone charger
29. 29.🔋 A 6 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
30. 30.🔋 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)? =
31. 31.🔍 Which is the odd one out? (a) fly a kite near wires (b) throw cells in a fire (c) stay away from pylons (d) touch a fallen wire
32. 32.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
33. 33.Which of these means the circuit is closed? (a) the switch is ON (b) the switch is OFF (c) a wire is cut (d) the bulb is unscrewed
34. 34.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they get dimmer (c) they explode (d) they all go out
35. 35.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) capacitor (b) resistor (c) motor (d) cell
36. 36.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to make bulbs dim (d) to save copper only
37. 37.🔍 Which is the odd one out? (a) dry your hands first (b) stay away from pylons (c) touch a switch when wet (d) fly kites in open fields
38. 38.🔋 How many 1.5 V cells must be joined in series to give 6 V?
39. 39.Which of these means the circuit is open? (a) the loop is complete (b) the switch is OFF (c) all wires are joined (d) the switch is ON
40. 40.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe

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