Question

what is ohms law and describe​

Answer 1

Definition

Ohm's Law

Ohm's Law is the mathematical relationship among electric current, resistance, and voltage. The principle is named after the German scientist Georg Simon Ohm.

In direct-current (DC) circuits, Ohm's Law is simple and linear. Suppose a resistance having a value of R ohms carries a current of I amperes. Then the voltage across the resistor is equal to the product IR. There are two corollaries. If a DC power source providing E volts is placed across a resistance of R ohms, then the current through the resistance is equal to E/R amperes. Also, in a DC circuit, if E volts appear across a component that carries I amperes, then the resistance of that component is equal to E/I ohms.

Mathematically, Ohm's Law for DC circuits can be stated as three equations:

E = IR

I = E/R

R = E/I

When making calculations, compatible units must be used. If the units are other than ohms (for resistance), amperes (for current), and volts for voltage), then unit conversions should be made before calculations are done. For example, kilohms should be converted to ohms, and microamperes should be converted to amperes.

Answer 2

$\huge\underline\mathfrak{Question:-}$ What is the Ohms law and describe ?

$<i><b>$

$\huge\bf\blue{Answer:-}$

$\bold\green{Ohm's\: Law:-}$ at a constant temperature the current flowing through a conductor is directly proportional to the potential difference across its ends .

I ∞ V

this can also written as V ∞ I

or V = R × I

when R is a constant called resistance of the conducter . The value of this constant depends on the nature , length area of cross - section and the temperature of the conductor . the above equation can also be written as :-

$\frac{v}{i} \: = \: r \:$

where V = Potential difference

I = Current

R= resistance ( which is constant )

about equation is a mathematical expressions of ohm's law equation one can be written in words as follows :-

$\frac{potential \: differences}{current} = \: constant \:$

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

$\frac{v}{i} = r \\ \\ \: v = \: \: i \times r \: \\ \\ \frac{v}{r} = \: i \: \\ \\ current \: i \: \: \: = \: \frac{v}{r}$

it it is obvious from this relation that

i) the current is directly proportional to potential difference and ,

ii) the current is inversely proportional to the resistance .