Question

write the formula and s.i unit for electric current and potential difference​

Answer 1

Answer:

Formula for electric current I= V/R . SI unit for electric current is Ampere. SI unit for potential difference is volt.

Answer 2

Electric Current :

The ampere, Symbol A is the S.I. unit of electric current.

Formula - The rate of flow of charge through a cross section of some region of a metallic material is called the electric current. It is related to the resistance of the material and the voltage applied to move the charge. It is measured in amperes (A).

Electric current = Voltage / Resistance

Potential Difference :

S.I. Unit - Volt

Formula -

Method 1:

Electric Potential Formula

The electric potential at any point around a point charge q is given by:

V = k × [q/r]

Where,

V = electric potential energy,

q = point charge,

r = distance between any point around the charge to the point charge,

k = Coulomb constant; k = 9.0 × 109 N.

Method 2: Using Coulomb’s Law

Electrostatic Potential Formula

The electrostatic potential between any two arbitrary charges q1, q2 separated by distance r is given by Coulomb’s law and mathematically written as:

U = k × [q1q2/r2]

Where,

U is the electrostatic potential energy,

q1 and q2 are the two charges.

Note: The electric potential is at infinity is zero (as, r = ∞ in the above formula).

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