Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 498 · 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: “a single current path” is true of a series circuit. (a) True (b) False
2. 2.True or false: a plastic straw is an insulator. (a) True (b) False
3. 3.Which of these is an insulator? (a) aluminium foil (b) a cotton thread (c) a metal paper clip (d) a steel spoon
4. 4.🔦 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
5. 5.Which of these gives us electricity? (a) a television (b) a washing machine (c) a computer (d) a solar panel
6. 6.🔍 Which is the odd one out? (a) touch a switch when wet (b) touch a fallen wire (c) throw cells in a fire (d) build with an adult near
7. 7.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
8. 8.True or false: to use a cable with cuts is safe. (a) True (b) False
9. 9.True or false: an exhaust fan mainly makes movement. (a) True (b) False
10. 10.💡 6 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. How many bulbs glow?
11. 11.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) cell (b) voltmeter (c) resistor (d) LED
12. 12.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
13. 13.Which of these is a conductor? (a) a woollen thread (b) a rubber band (c) a brass key (d) a dry cork
14. 14.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
15. 15.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) diode (b) wire (c) resistor (d) bulb
16. 16.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
17. 17.🔦 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) No (b) Yes
18. 18.🔘 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 ON, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
19. 19.Which of these mainly gives out light? (a) a room heater (b) a table fan (c) a street light (d) an exhaust fan
20. 20.🔘 Which kind of switch slides side to side? (a) a reed switch (b) a push button (c) a tilt switch (d) a slide switch
21. 21.🔦 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 rubber band. Does the bulb glow? (a) Yes (b) No
22. 22.Which of these is true of a parallel circuit? (a) each gets the full volts (b) a single current path (c) a break stops every bulb (d) one bulb out, all go out
23. 23.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
24. 24.What does a toggle switch do? (a) works only while pressed (b) closes when tipped over (c) springs back when let go (d) stays where you flip it
25. 25.⚡ What does a buzzer mainly change electricity into? (a) heat (b) sound (c) movement (d) light
26. 26.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a steel spoon. Does the bulb glow? (a) Yes (b) No
27. 27.🔋 What is a battery? (a) one single wire (b) two or more cells joined (c) a switch with a lid (d) a kind of bulb
28. 28.🔁 What must there be for a current to flow? (a) a complete loop (b) a broken path (c) a plastic gap (d) one loose end
29. 29.Which of these is an insulator? (a) a wooden stick (b) a metal paper clip (c) a copper wire (d) a steel spoon
30. 30.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
31. 31.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a long wire (c) a bulb (d) a plug top
32. 32.🔋 5 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
33. 33.Which of these mainly gives out heat? (a) an exhaust fan (b) an electric iron (c) an LED lamp (d) a night lamp
34. 34.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) both lines (c) the longer line (d) the shorter line
35. 35.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) wavy lines (c) straight lines (d) dotted circles
36. 36.Which of these is true of a series circuit? (a) many paths for current (b) used in house wiring (c) own switch for each bulb (d) bulbs share the voltage
37. 37.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) a wire has come loose (d) the switch is ON
38. 38.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a parallel circuit (c) a short circuit (d) a safe circuit
39. 39.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
40. 40.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same

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