PHYSICS · Multi-part · CBSE · Physics · Units and Measurements · Units and Measurements
Problem
Three separate generators feed a common bus-bar. At a particular instant the currents supplied by the generators are recorded as
2.35kA, 450A and 7.8mA respectively.
(i) Convert each current to amperes in scientific notation and add them to obtain the total current in amperes.
(ii) Express the total current obtained in part (i) using a single SI prefix attached to the ampere such that the coefficient is between 1 and 1000.
(iii) If the bus-bar resistance is 2.0mΩ, calculate the power dissipated in the bus-bar and express the answer using an appropriate SI prefix.