Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 164 · 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.💡 2 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. Does bulb 1 glow? (a) No (b) Yes
2. 2.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 230 V (c) 9 V (d) 1.5 V
3. 3.🔘 A bulb and a cell are joined through 2 switches on 2 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
4. 4.True or false: to poke things in a socket is not safe. (a) False (b) True
5. 5.Which of these is true of a series circuit? (a) one out, the rest glow (b) each gets the full volts (c) bulbs share the voltage (d) used in house wiring
6. 6.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) when either is ON (b) never (c) only when both are ON (d) only when both are OFF
7. 7.🔦 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
8. 8.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the filament (c) the glass (d) the switch
9. 9.True or false: a slide switch slides side to side. (a) True (b) False
10. 10.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
11. 11.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) both lines (c) the shorter line (d) the longer line
12. 12.Which of these is a conductor? (a) a steel coin (b) a plastic straw (c) a glass marble (d) a rubber eraser
13. 13.🔋 4 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
14. 14.True or false: a traffic signal mainly makes movement. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) use small battery cells (b) use a cable with cuts (c) fly a kite near wires (d) throw cells in a fire
16. 16.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
17. 17.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is OFF. Does the bulb glow? (a) Yes (b) No
18. 18.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
19. 19.What does a push button do? (a) closes near a magnet (b) works only while pressed (c) closes when tipped over (d) stays where you flip it
20. 20.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) Yes (b) No
21. 21.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
22. 22.🔁 What must there be for a current to flow? (a) one loose end (b) a complete loop (c) a plastic gap (d) a broken path
23. 23.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
24. 24.Which of these mainly gives out light? (a) a torch (b) an electric kettle (c) a toaster (d) a siren
25. 25.Which of these means the circuit is closed? (a) a cell is taken out (b) the bulb is unscrewed (c) the switch is OFF (d) the loop is complete
26. 26.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
27. 27.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
28. 28.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) water drops (c) electrons (d) photons
29. 29.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) little stars (c) dotted circles (d) straight lines
30. 30.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) no voltage (c) the same voltage (d) a bigger voltage
31. 31.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
32. 32.💡 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?
33. 33.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the switch is ON (d) the switch is OFF
34. 34.🔌 Is a brass key a conductor or an insulator? (a) a conductor (b) an insulator
35. 35.True or false: to use a cable with cuts is safe. (a) True (b) False
36. 36.True or false: a rubber eraser is a conductor. (a) True (b) False
37. 37.Which of these is a conductor? (a) a dry cork (b) a plastic straw (c) a ceramic cup (d) a safety pin
38. 38.Which drawing is the symbol for a voltmeter? (a) a dot where wires meet (b) a circle with M inside (c) two equal parallel lines (d) a circle with V inside
39. 39.💡 In a series circuit, how many paths does the current have? (a) none (b) one (c) two (d) one for each bulb
40. 40.Which drawing is the symbol for a bulb? (a) triangle against a bar (b) a straight line (c) one tall, one short bar (d) a circle with a cross

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