Resistance and Resistivity#!#Power Dissipation#!#Joule Heating Law

Resistance Ohm's law || Resistivity

Four equal resistance dissipated 5 W of power together when connected in series to a battery of negligible internal resistance . The total power dissipated in these resistance when connected in parallel across the same battery would be .

The emf of the cell is 1.8 V and internal resistance is 2//3 Omega , calculate the current in the 3 Oemga resistance and the power dissipated in the whole circuit.

The value of the resistance R in figure is adjusted such that power dissipated in the 2Omega resistor is maximum. Under this condition

A current in a circuit having constant resistance is tripled. How does this affect the power dissipation?

An ac source is connected across a resistance of 10 Omega The power dissipated in the resistor is 100W The rms valuse of the current and voltge are .

Limitations Of OHM's Law|Resistance And Resistivity|Effect Of Temperature