Question

electricity notes class 10 please tell me about ohm law
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Answer 1

Answer:

Ohm's law is a law that states that the voltage across a resistor is directly proportional to the current flowing through the resistance. ...Ohm's law is a law that states that the voltage across a resistor is directly proportional to the current flowing through the resistance.

Answer 2

Answer:

your answer

Explanation:

ohm's law gives a relationship between current and potential difference.

according to ohm's law : at constant temperature, the current flowing through a conductor is directly proportional to the potential difference across its ends. if I is the current flowing through a conductor and V is the potential difference across its ends , then according to ohm's law :--

I is directly proportional to V ( at constant temperature )

this can be also be written as

V is directly proportional to I

or

V = R*I

where R is a constant called " resistance " of the conductor. the value of this constant depends on the nature, length, area of cross section and temperature of the conductor.

the above equation can also be written as :--

V/I = R (1)

where V = potential difference

I = current

and R = resistance ( which is constant)

the above equation is a mathematical expression of ohm's law. equation (1) can be written in words as follows :----

potential difference/current= constant ( called resistance)

we find that the ratio of potential difference applied between the ends of a conductor and the current flowing through it is a constant quantity called resistance.

we have just seen that :----

V/I = R

V = I * R

V/R = I

current, I = V/R

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