Power Dissipation In Galvanometer — the NEET Physics formula with its derivation, variables, validity constraints and worked solver.
Power Dissipation in Galvanometer This formula set applies to analyzing the power dissipated in the three components (coil, shunt, and series resistor) of a galvanometer when a total current I flows through it. The power dissipated in any resistor is given by P = I 2 R . The power in the coil ( P coil ) is calculated using the total current I and the coil resistance G : P coil = I 2 G . The current through the shunt resistor is (I - I g) , so P shunt = (I - I g) 2 R s . The power in the series resistor ( P series ) is calculated using the current I g and its resistance R series : P series = I g 2 R series . I 0 I g 0 R s > 0 R series > 0 Confusing the current flowing through the shunt resistor (it is I - I g ) with the total current I . Assuming the power dissipation is simply the sum of I 2 R for all components without considering the specific current paths. Mixing up the roles of the shunt resistor ( R s ) and the series resistor ( R series ).