Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 152 · 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: “many paths for current” is true of a series circuit. (a) True (b) False
2. 2.Which of these is true of a series circuit? (a) many paths for current (b) one out, the rest glow (c) used in house wiring (d) one bulb out, all go out
3. 3.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to hide the circuit (c) quick and clear for all (d) to make it colourful
4. 4.🔘 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 OFF. Does the bulb glow? (a) No (b) Yes
5. 5.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
6. 6.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) LED (b) capacitor (c) cell (d) resistor
7. 7.⚠️ 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
8. 8.⚡ A cell changes stored chemical energy into which kind of energy? (a) nuclear energy (b) electrical energy (c) sound energy (d) wind energy
9. 9.🔘 What does a switch do in a circuit? (a) changes the voltage (b) makes electricity (c) opens or closes the loop (d) stores current
10. 10.🔘 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
11. 11.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
12. 12.🔌 Is a cotton thread a conductor or an insulator? (a) an insulator (b) a conductor
13. 13.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) No (b) Yes
14. 14.What does a reed switch do? (a) works only while pressed (b) flips up or down (c) slides side to side (d) closes near a magnet
15. 15.🔦 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 a rubber band. Does the bulb glow? (a) Yes (b) No
16. 16.⚠️ Which power source should children use for electronics projects? (a) a small battery pack (b) a mains extension board (c) an inverter socket (d) a wall socket
17. 17.Which drawing is the symbol for a bulb? (a) a circle with an X in it (b) a circle with A inside (c) a circle with V inside (d) a dot where wires meet
18. 18.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) neither line (c) the shorter line (d) the longer line
19. 19.Which of these uses electricity? (a) a cell (b) a computer (c) a power station (d) a battery
20. 20.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) a bigger voltage (c) the same voltage (d) no voltage
21. 21.⚡ What does a toaster mainly change electricity into? (a) heat (b) sound (c) light (d) movement
22. 22.🔘 Which kind of switch closes when tipped over? (a) a reed switch (b) a tilt switch (c) a push button (d) a slide switch
23. 23.Which of these gives us electricity? (a) a washing machine (b) a water pump (c) a wind turbine (d) a computer
24. 24.🔁 What must there be for a current to flow? (a) a plastic gap (b) one loose end (c) a broken path (d) a complete loop
25. 25.Which of these is true of a parallel circuit? (a) used in house wiring (b) a single current path (c) bulbs share the voltage (d) a break stops every bulb
26. 26.Which of these gives us electricity? (a) a refrigerator (b) a mobile phone (c) a computer (d) a cell
27. 27.True or false: an electric kettle mainly gives out light. (a) False (b) True
28. 28.⚡ What does a traffic signal mainly change electricity into? (a) sound (b) heat (c) light (d) movement
29. 29.Which of these means the circuit is closed? (a) the switch is OFF (b) the switch is ON (c) the bulb is unscrewed (d) a wire has come loose
30. 30.🔍 Which is the odd one out? (a) a paper strip (b) a copper wire (c) a plastic ruler (d) a rubber band
31. 31.Which of these mainly makes sound? (a) a buzzer (b) an electric iron (c) an electric kettle (d) a room heater
32. 32.⚡ What does a street light mainly change electricity into? (a) sound (b) light (c) heat (d) movement
33. 33.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic is an insulator (d) plastic makes current
34. 34.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) LED (b) cell (c) junction (d) bulb
35. 35.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) resistor (b) junction (c) battery (d) cell
36. 36.True or false: a copper wire is a conductor. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) a school bell (b) a doorbell (c) a torch (d) a buzzer
38. 38.🔍 Which is the odd one out? (a) poke things in a socket (b) stay away from pylons (c) fly a kite near wires (d) touch a fallen wire
39. 39.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
40. 40.Which of these is an insulator? (a) a graphite rod (b) a steel coin (c) a cotton thread (d) an iron nail

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