Let I= current through a conductor, R= its resistance and V= potential difference across its ends. According to Ohm's law, product of two of these quantities equals the third. Obtain Ohm's law from dimensional analysis. Dimensonal formulae for R andV are `ML^2I^-2T^-3 and ML^2T^-3I^-1` respectively.

Let I = current through a conductor, R =its resistance and V = potential difference across its ends. According to Ohm's law, product of two of these quantites equals the third. Obtain Ohm's law from dimensional analysis. Dimensional formula for R and V are [ML^2 T^(-3) A^(-2)] and [ML^2 T^(-2) A^(-1)] respectively.

If a current of 3 A flows through a wire of resistance 8 ohms, calculate the potential difference applied across its ends.

If the strength of current flows through a resistor is I having resistance R and potential difference between its ends is V then the power dissipated is:

When a current I is passed through a wire of constant resistance, it produces a potential difference V across its ends. The graph drawn between log I and log V will be

The heat produced in a wire carrying an electric current depends on the current, the resistance and the time. Assuming that the dependance is of the product of powers type, guess an eqn. between these quantities using dimensional analysis. The dimensional formula of resistance is ML^2 A^(-2) T^(-3) and heat is a form of energy.

According to Ohm's law (R=V/I) as current flowing through a conductor increases, resistance of conductor

Calculate the resistance of a conductor through which a current of 2A passes, when the potential difference between its ends is 30V.