Question

how much work done in moving a charge of one columb from a point at 118 volts to a point at 128 volts

Answer 1

Answer:

10 Joules.

Explanation:

Potential difference is the work done in moving a unit positive charge from a Point A to point B.

⇒ Potential Difference = ΔV = W/q

Where, ΔV = change in potential, W = work done and q = charge.

Here, Final potential = 128 V and initial potential = 118 V.

$\sf \Delta V = V_{final} - V_{initial}$

⇒ ΔV = 128 - 118

⇒ ΔV = 10

Given, q = 1 C and ΔV = 10 V. So

10 = W/1

⇒ W = 10 × 1

⇒ W = 10 Joules.

Answer 2

According to the Question

W = V × Q

Firstly we have :-

W = V × Q

W = 128 × 1

W = 128 joule

Secondly we have 118 volt :-

W = V × Q

W = 118 × 1

W = 118 joule

Hence :-

Work done for 118v to 128v :-

= 128 - 118

= 10 joule