Gujarati
2. Electric Potential and Capacitance
medium

किसी बिन्दु पर विद्युत विभव $V =  - 5x + 3y + \sqrt {15} z$ से दिया जाता है। विद्युत क्षेत्र का परिमाण है

A

$3\sqrt 2 $

B

$4\sqrt 2 $

C

$5\sqrt 2 $

D

$7$

Solution

${E_x} =  – \frac{{dV}}{{dx}} =  – ( – 5) = 5;$${E_y} =  – \frac{{dV}}{{dy}} =  – 3$

एवं ${E_z} =  – \frac{{dV}}{{dz}} =  – \sqrt {15} $

${E_{net}} = \sqrt {E_x^2 + E_y^2 + E_z^2}  = \sqrt {{{(5)}^2} + {{( – 3)}^2} + {{( – \sqrt {15} )}^2}}  = 7$

Standard 12
Physics

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