Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 324 · 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 of these is true of a series circuit? (a) used in house wiring (b) own switch for each bulb (c) one out, the rest glow (d) a break stops every bulb
2. 2.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
3. 3.🔘 Which kind of switch works only while pressed? (a) a tilt switch (b) a push button (c) a slide switch (d) a toggle switch
4. 4.🔍 Which is the odd one out? (a) a night lamp (b) a tube light (c) an LED lamp (d) a doorbell
5. 5.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
6. 6.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a wooden stick. Does the bulb glow? (a) No (b) Yes
7. 7.True or false: a plastic straw is a conductor. (a) False (b) True
8. 8.🔋 8 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
9. 9.💡 2 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
10. 10.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
11. 11.🔌 Most metals are good … (a) batteries (b) magnets only (c) insulators (d) conductors
12. 12.💡 5 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?
13. 13.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they keep glowing (d) they all go out
14. 14.🔋 A 6 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
15. 15.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) wire (b) capacitor (c) bulb (d) battery
16. 16.Which of these means the circuit is open? (a) the loop is complete (b) a wire has come loose (c) the switch is ON (d) all wires are joined
17. 17.Which of these is a conductor? (a) a dry cork (b) a rubber band (c) a cotton thread (d) a graphite rod
18. 18.Which of these is safe? (a) poke things in a socket (b) fly kites in open fields (c) open a phone charger (d) use a cable with cuts
19. 19.🔦 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
20. 20.🔘 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) Yes (b) No
21. 21.Which drawing is the symbol for a wire? (a) two equal parallel lines (b) a circle with a cross (c) a circle with an X in it (d) a straight line
22. 22.Which of these is safe? (a) use mains for a project (b) poke things in a socket (c) touch a fallen wire (d) stay away from pylons
23. 23.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) movement energy (c) chemical energy (d) sound energy
24. 24.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
25. 25.Which of these gives us electricity? (a) a mobile phone (b) a washing machine (c) a generator (d) a television
26. 26.Which of these is an insulator? (a) a paper strip (b) a safety pin (c) an iron nail (d) a steel coin
27. 27.🔍 Which is the odd one out? (a) a night lamp (b) a street light (c) an electric iron (d) a traffic signal
28. 28.Which of these is true of a parallel circuit? (a) a single current path (b) many paths for current (c) one bulb out, all go out (d) bulbs share the voltage
29. 29.🔦 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 an iron nail. Does the bulb glow? (a) Yes (b) No
30. 30.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) Yes (b) No
31. 31.Which of these mainly makes sound? (a) a toaster (b) a siren (c) a tube light (d) a mixer grinder
32. 32.True or false: a water heater mainly gives out heat. (a) True (b) False
33. 33.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) No (b) Yes
34. 34.🔍 Which is the odd one out? (a) open a phone charger (b) fly kites in open fields (c) throw cells in a fire (d) fly a kite near wires
35. 35.⚡ What does a street light mainly change electricity into? (a) movement (b) heat (c) light (d) sound
36. 36.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are OFF (c) when either is ON (d) when both are ON
37. 37.🔍 Which is the odd one out? (a) a street light (b) a table fan (c) an electric toy car (d) an exhaust fan
38. 38.True or false: an electric drill mainly makes sound. (a) False (b) True
39. 39.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) the longer line (d) both lines
40. 40.💡 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?

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