Question

Calculate amount of work done to caeey 2C charge from a point at 118V to 128V

Answer 1

Given :

➳ Charge of magnitude 2C is moved from a point at potential 118V to another point at potential 128V$.$

To Find :

➠ Work done in moving charge$.$

Solution :

◈ Work done in moving a charge of magnitude q from one point to another point is given by,

፨ W = q × ΔV

• W denotes work done
• q denotes magnitude of charge
• ΔV denotes pd b/w both points

Let's calculate ☃

⇒ W = q × ΔV

⇒ W = 2 × (128 - 118)

⇒ W = 2 × 10

⇒ W = 20J

Answer 2

Given ,

Charge (q) = 2 C

Potential difference (ΔV) = 128 - 118 = 10 v

We know that ,

The work done to move a unit charge from one point to another point is called potential difference

$\boxed{ \sf{ΔV = \frac{work \: done}{charge} }}$

Thus ,

10 = work done/2

work done = 10 × 2

work done = 20 J

Therefore ,

• The required work done is 20 J