The potential difference across a device is measured as with an uncertainty of

PHYSICS · Subjective · CBSE · Physics · Units and Measurements · Units and Measurements

Problem

The potential difference across a device is measured as

100\,\text{V}

with an uncertainty of

\pm2\,\%

, and the current through it is

5.0\,\text{A}

with an uncertainty of

\pm2\,%

. Determine: (a) the electrical power delivered to the device, and (b) the percentage and absolute uncertainty in the calculated power.