Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 591 · 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.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) quick and clear for all (c) symbols are heavier (d) to make it colourful
2. 2.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
3. 3.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) not joined (d) in series
4. 4.Which drawing is the symbol for a battery? (a) two or more cell symbols (b) a circle with V inside (c) a dot where wires meet (d) a plain rectangle
5. 5.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
6. 6.⚡ What does an electric kettle mainly change electricity into? (a) light (b) movement (c) heat (d) sound
7. 7.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
8. 8.True or false: a tilt switch works only while pressed. (a) True (b) False
9. 9.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a full circuit (c) a closed circuit (d) a series circuit
10. 10.⚡ What does a loudspeaker mainly change electricity into? (a) sound (b) movement (c) light (d) heat
11. 11.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
12. 12.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
13. 13.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 1.5 V (c) 230 V (d) 9 V
14. 14.🔋 What is a battery? (a) a kind of bulb (b) two or more cells joined (c) a switch with a lid (d) one single wire
15. 15.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
16. 16.True or false: a toggle switch stays where you flip it. (a) True (b) False
17. 17.True or false: a rice cooker mainly makes sound. (a) True (b) False
18. 18.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) shout for an adult (c) pour water on them (d) wait and watch
19. 19.True or false: a rice cooker mainly gives out heat. (a) True (b) False
20. 20.True or false: aluminium foil is an insulator. (a) True (b) False
21. 21.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
22. 22.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) plastic is a conductor (c) plastic makes current (d) to make them heavy
23. 23.Which of these is a conductor? (a) a metal paper clip (b) a glass marble (c) a plastic ruler (d) a wooden stick
24. 24.🔘 Which kind of switch flips up or down? (a) a reed switch (b) a push button (c) a tilt switch (d) a toggle switch
25. 25.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
26. 26.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
27. 27.🔍 Which is the odd one out? (a) a mixer grinder (b) a loudspeaker (c) a ceiling fan (d) an electric drill
28. 28.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are OFF (c) when both are ON (d) when either is ON
29. 29.🔍 Which is the odd one out? (a) build with an adult near (b) dry your hands first (c) take cells out after use (d) open a phone charger
30. 30.🔘 What does a switch do in a circuit? (a) makes electricity (b) stores current (c) opens or closes the loop (d) changes the voltage
31. 31.🔋 5 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
32. 32.Which of these is not safe? (a) dry your hands first (b) throw cells in a fire (c) build with an adult near (d) take cells out after use
33. 33.Which of these uses electricity? (a) a cell (b) a television (c) a solar panel (d) a generator
34. 34.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
35. 35.Which of these mainly gives out light? (a) a water heater (b) a loudspeaker (c) an electric iron (d) a street light
36. 36.🔍 Which is the odd one out? (a) keep drinks far away (b) touch a fallen wire (c) open a phone charger (d) climb an electric pole
37. 37.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) switch (b) battery (c) ammeter (d) resistor
38. 38.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
39. 39.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
40. 40.True or false: to fly kites in open fields is not safe. (a) False (b) True

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