Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 727 · 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.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) motor (b) junction (c) capacitor (d) resistor
2. 2.🔋 A 9 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
3. 3.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
4. 4.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 0.5 V (c) 1.5 V (d) 230 V
5. 5.True or false: one tall, one short bar is the symbol for a cell. (a) False (b) True
6. 6.🔍 Which is the odd one out? (a) a mixer grinder (b) a ceiling fan (c) a tube light (d) a table fan
7. 7.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) wavy lines (c) straight lines (d) dotted circles
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. A gap in one wire is bridged by a steel spoon. Does the bulb glow? (a) Yes (b) No
9. 9.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) by Wi-Fi (d) in series
10. 10.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
11. 11.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) sound energy (c) movement energy (d) light energy
12. 12.🔘 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 ON. Does the bulb glow? (a) Yes (b) No
13. 13.True or false: to stay away from pylons is safe. (a) True (b) False
14. 14.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
15. 15.Which of these is not safe? (a) take cells out after use (b) stay away from pylons (c) fly a kite near wires (d) use small battery cells
16. 16.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
17. 17.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity
18. 18.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a bulb (c) a long wire (d) a fuse or MCB
19. 19.💡 4 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
20. 20.Which of these mainly makes movement? (a) a water heater (b) a toaster (c) a buzzer (d) an exhaust fan
21. 21.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
22. 22.Which of these mainly gives out heat? (a) a street light (b) a ceiling fan (c) a room heater (d) a loudspeaker
23. 23.True or false: a traffic signal mainly gives out light. (a) True (b) False
24. 24.⚠️ Is it safe to open a phone charger? (a) not safe (b) safe
25. 25.What does a tilt switch do? (a) flips up or down (b) closes when tipped over (c) springs back when let go (d) slides side to side
26. 26.Which of these is not safe? (a) dry your hands first (b) stop if a part gets hot (c) throw cells in a fire (d) use small battery cells
27. 27.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) to hide the circuit (d) quick and clear for all
28. 28.Which of these is true of a series circuit? (a) each gets the full volts (b) one out, the rest glow (c) own switch for each bulb (d) bulbs share the voltage
29. 29.True or false: a long and a short line is the symbol for a cell. (a) False (b) True
30. 30.💡 3 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
31. 31.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
32. 32.🔋 What should you do with used-up cells? (a) give them for recycling (b) throw them in a fire (c) cut them open (d) bury them in soil
33. 33.Which drawing is the symbol for a cell? (a) two or more cell symbols (b) a long and a short line (c) a circle with A inside (d) a straight line
34. 34.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
35. 35.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) diode (b) wire (c) resistor (d) battery
36. 36.True or false: if the switch is ON, the circuit is open and no current flows. (a) False (b) True
37. 37.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
38. 38.🔘 Which kind of switch stays where you flip it? (a) a tilt switch (b) a toggle switch (c) a slide switch (d) a reed switch
39. 39.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
40. 40.💡 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

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