Question

1 micro coulomb charge is shifted from A to B and it is found that workdone by an external force is 40 micro joule . in doing so against electrostatic forces ,find the potential difference Va-Vb

Answer 1

Answer:

Va-Vb= -40 Volts

Explanation:

Vb-Va = W/Q

=40*10^-6/1*10^-6

=40 Volts

Answer 2

Answer:

the potential difference Va-Vb = - 40 V.

Explanation:

Given,

1 micro coulomb charge is shifted from A to B and it is found that workdone by an external force is 40 micro joule.

To find: potential difference Va-Vb

Solution:

Work done is given as:

W = qΔV

where, q = charge

Substituting the values,

Wab = q(Vb - Va)

or, 40μJ = 1 μC (Vb - Va)

or, Va - Vb = - 40 V

Therefore, the potential difference Va-Vb = - 40 V.