Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 930 · 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.💡 6 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 6 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
2. 2.True or false: a tube light mainly gives out light. (a) True (b) False
3. 3.🔋 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)? =
4. 4.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
5. 5.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
6. 6.Which of these means the circuit is open? (a) a wire has come loose (b) the switch is ON (c) the loop is complete (d) all wires are joined
7. 7.🔘 A bulb and a cell are joined through 6 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
8. 8.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
9. 9.🔍 Which is the odd one out? (a) touch a fallen wire (b) use small battery cells (c) build with an adult near (d) stop if a part gets hot
10. 10.Which of these mainly gives out heat? (a) an exhaust fan (b) a table fan (c) a torch (d) a toaster
11. 11.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by aluminium foil. Does the bulb glow? (a) Yes (b) No
12. 12.Which drawing is the symbol for a capacitor? (a) triangle, bar and arrows (b) a line lifted at a gap (c) two equal parallel lines (d) a circle with a cross
13. 13.🔘 Which kind of switch springs back when let go? (a) a reed switch (b) a tilt switch (c) a slide switch (d) a push button
14. 14.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
15. 15.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) a wire has come loose (c) the switch is OFF (d) all wires are joined
16. 16.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) a closed circuit (c) a series circuit (d) an open circuit
17. 17.True or false: to poke things in a socket is safe. (a) True (b) False
18. 18.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
19. 19.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
20. 20.⚡ A solar panel changes which kind of energy into electricity? (a) light energy (b) chemical energy (c) wind energy (d) sound energy
21. 21.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a small battery pack (c) an inverter socket (d) a mains extension board
22. 22.Which of these mainly makes movement? (a) a night lamp (b) a torch (c) a ceiling fan (d) an electric kettle
23. 23.🔍 Which is the odd one out? (a) a cotton thread (b) a ceramic cup (c) a wooden stick (d) a safety pin
24. 24.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
25. 25.Which of these is an insulator? (a) aluminium foil (b) a metal paper clip (c) a steel spoon (d) a rubber eraser
26. 26.True or false: a circle with a cross is the symbol for a bulb. (a) True (b) False
27. 27.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
28. 28.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) voltmeter (b) bulb (c) junction (d) resistor
29. 29.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
30. 30.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is a conductor (c) to make them heavy (d) plastic is an insulator
31. 31.⚡ What does a night lamp mainly change electricity into? (a) heat (b) movement (c) sound (d) light
32. 32.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
33. 33.Which of these mainly makes sound? (a) an electric toy car (b) a torch (c) an LED lamp (d) a doorbell
34. 34.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a reed switch (c) a toggle switch (d) a tilt switch
35. 35.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) an insulator (c) a cell (d) a conductor
36. 36.What does a toggle switch do? (a) closes when tipped over (b) works only while pressed (c) springs back when let go (d) flips up or down
37. 37.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) both of them (c) it does not matter (d) only one
38. 38.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
39. 39.💡 A battery lights 3 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
40. 40.🔦 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 an iron nail. Does the bulb glow? (a) No (b) Yes

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