Question

2. In SI units, v at a point in an
electric field is given by V-6/x +2
find the value of E in the
field at the point (2,0 and o).​

Answer 1

Answer:

PHYSICS

Electric field in a region is given as Eˉ=xi^+2yj^+3k^. In this region point A(3,3,1) and point B (4,2,1) are there. The magnitude of work done by the electric field, if 2 coulomb charge is moved from A to B. All values are in SI units:

A

3

B

4

C

5

D

6

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ANSWER

Given, E=xi^+2yj^+3k^ and q=2C

Work done, W=∫ABqE.dr=q∫AB(xi^+2yj^+3k^).(dxi^+dyj^+dzk^)

or,W=2∫(3,3,1)(4,2,1)xdx+2ydy+3dz=2[216−9+(4−9)+3(1−1)]=7−10=−3

Magnitude of work done=∣W∣=3