Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 184 · 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.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) movement energy (c) sound energy (d) light energy
2. 2.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
3. 3.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water makes it cold (c) water carries current (d) it spoils the paint
4. 4.💡 In a series circuit, how many paths does the current have? (a) none (b) one (c) one for each bulb (d) two
5. 5.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pour water on them (b) shout for an adult (c) wait and watch (d) pull them by the hand
6. 6.🔘 What does a switch do in a circuit? (a) opens or closes the loop (b) makes electricity (c) stores current (d) changes the voltage
7. 7.Which of these is an insulator? (a) a safety pin (b) a metal paper clip (c) a wooden stick (d) a steel coin
8. 8.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) Yes (b) No
9. 9.🔘 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 OFF and C is ON. Does the bulb glow? (a) Yes (b) No
10. 10.⚡ A solar panel changes which kind of energy into electricity? (a) chemical energy (b) sound energy (c) light energy (d) wind energy
11. 11.🔘 A bulb and a cell are joined through 4 switches on 4 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?
12. 12.True or false: if the switch is OFF, the circuit is open and no current flows. (a) False (b) True
13. 13.Which of these mainly gives out light? (a) a room heater (b) a rice cooker (c) an LED lamp (d) an electric drill
14. 14.True or false: “a single current path” is true of a series circuit. (a) False (b) True
15. 15.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) to make them heavy (c) plastic is an insulator (d) plastic is a conductor
16. 16.🔋 8 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)? =
17. 17.Which of these means the circuit is closed? (a) a wire has come loose (b) all wires are joined (c) a cell is taken out (d) a wire is cut
18. 18.Which of these is safe? (a) fly a kite near wires (b) climb an electric pole (c) throw cells in a fire (d) use small battery cells
19. 19.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
20. 20.Which of these mainly makes sound? (a) an electric kettle (b) an electric toy car (c) a table fan (d) a school bell
21. 21.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) a bigger voltage (c) the same voltage (d) no voltage
22. 22.True or false: to stay away from pylons is not safe. (a) True (b) False
23. 23.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
24. 24.Which of these gives us electricity? (a) a cell (b) a washing machine (c) a television (d) a computer
25. 25.Which of these is not safe? (a) stay away from pylons (b) fly kites in open fields (c) touch a switch when wet (d) build with an adult near
26. 26.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) True (b) False
27. 27.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
28. 28.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) switch (b) battery (c) capacitor (d) voltmeter
29. 29.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
30. 30.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) a wire has come loose (d) the switch is ON
31. 31.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
32. 32.🔘 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 ON. Does the bulb glow? (a) No (b) Yes
33. 33.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a break stops every bulb (c) a single current path (d) many paths for current
34. 34.🔘 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 ON and C is OFF. Does the bulb glow? (a) No (b) Yes
35. 35.Which of these is true of a series circuit? (a) own switch for each bulb (b) a single current path (c) many paths for current (d) each gets the full volts
36. 36.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
37. 37.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
38. 38.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 1.5 V (c) 12 V (d) 9 V
39. 39.True or false: a reed switch stays where you flip it. (a) True (b) False
40. 40.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)

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