Question

) i) Give the reason why the ratio of V/I incase of LED is not constant

ii) write any applications of Ohm`s law in daily life

iii) what is the usage of Alloys like Nichrome and Manganese.

iv) Define electric current ​

Answer 1

Explanation:

1. Ohm's law applies to resistance. So logically the anything that doesn't behave according to ohms law isn't a resistor. Or any thing that isn't a resistor won't behave according to ohms law.
2. It provides variable output voltage based on the resistance and the overall working is controlled by Ohm's Law. The working of heaters, kettles and other equipment also follows this law. Mobile phone & laptop chargers use DC power supply in operations.
3. Alloys like nichrome and manganese are used for making of heating element because they have high melting point, low thermal expansion and have good resistivity.
4. Electric current is rate of flow of electric charge or the amount of charge flowing through a particular area in unit time

Answer 2

Answer:

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