Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 505 · 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.🔋 3 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)? =
2. 2.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) light energy (c) movement energy (d) sound energy
3. 3.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
4. 4.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) quick and clear for all (d) to hide the circuit
5. 5.💡 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
6. 6.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
7. 7.Which of these is safe? (a) use mains for a project (b) poke things in a socket (c) stay away from pylons (d) fly a kite near wires
8. 8.🔘 A bulb and a cell are joined through 5 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
9. 9.🔍 Which is the odd one out? (a) open a phone charger (b) touch a fallen wire (c) poke things in a socket (d) stay away from pylons
10. 10.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
11. 11.⚡ What does an electric drill mainly change electricity into? (a) sound (b) light (c) heat (d) movement
12. 12.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) the same voltage (c) no voltage (d) half the voltage
13. 13.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
14. 14.True or false: if a cell is taken out, the circuit is open and no current flows. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) a traffic signal (b) a tube light (c) a buzzer (d) a torch
16. 16.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
17. 17.Which of these mainly makes movement? (a) a school bell (b) a night lamp (c) an electric toy car (d) a traffic signal
18. 18.🔍 Which is the odd one out? (a) aluminium foil (b) an iron nail (c) a plastic straw (d) a steel coin
19. 19.🔘 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 OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
20. 20.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) diode (b) resistor (c) junction (d) battery
21. 21.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
22. 22.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
23. 23.Which drawing is the symbol for a motor? (a) many long-short pairs (b) a circle with M inside (c) a circle with a cross (d) a circle with V inside
24. 24.💡 A battery lights 4 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
25. 25.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
26. 26.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
27. 27.💡 4 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
28. 28.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
29. 29.Which of these mainly makes sound? (a) a school bell (b) a room heater (c) a rice cooker (d) a tube light
30. 30.Which of these means the circuit is closed? (a) a cell is taken out (b) a wire has come loose (c) the switch is ON (d) the bulb is unscrewed
31. 31.💡 5 identical bulbs are joined in series with a 12.5 V battery (ideal wires). How many volts does each bulb get? =
32. 32.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
33. 33.Which of these means the circuit is open? (a) a cell is taken out (b) the switch is ON (c) all wires are joined (d) the loop is complete
34. 34.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) only when both are ON (c) when either is ON (d) never
35. 35.True or false: a line lifted at a gap is the symbol for a switch. (a) True (b) False
36. 36.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) friction (c) a magnet (d) electric current
37. 37.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the base (c) the filament (d) the glass
38. 38.🔘 Which kind of switch flips up or down? (a) a reed switch (b) a slide switch (c) a push button (d) a toggle switch
39. 39.What does a toggle switch do? (a) stays where you flip it (b) closes near a magnet (c) slides side to side (d) works only while pressed
40. 40.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes

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