What is current density ? Obtain ohm’s law in vector form
Answers
the amount of electric current flowing per unit cross-sectional area of a material
vector form of ohms law
Jˉ is the current density, Eˉ is the electric field and σ is conductivity. Conductivity is the reciprocal of resistivity
Answer:
Ohm’s law states that the current through a conductor between two points is directly proportional to the voltage across the two points.
Ohm’s law formula is written as;
V ∝ I
Therefore, V = RI where R is a constant called resistance. R depends on the dimensions of the conductor and also on the material of the conductor. Its SI unit is Ohm (Ω).
Relationship between Current and Voltage
Ohm’s law was found out by various experiments, somewhat similar to the thermodynamic laws. As far as its significance is concerned, this law is used withing all branches of electronic studies or science. The law is useful in carrying out calculations such as in determining the value of resistors or the current in a circuit or in measuring the voltage.
Additionally, Ohm’s law helps us describe how current flows through materials such as electrical wires, etc.