Page 12 - CHAPTER-1 (Electricity)

CHAPTER 1

ELECTRICITY

Example 3:

Compute the work done in moving a charge of 3C across two points

having a potential difference 15V?

Solution:

Given, charge, = 3 ; Potential difference, ∆ = 15

The amount of work done in moving the charge,

W=Vq=15×3=45J

Example 4:

Compute the potential difference between two terminals of a

battery, if 100J of work is required to transfer the charge of 20C from

one terminal of the battery to the other.

Solution:

Given, work done, W=100J; Charge, q=20C

Potential difference, ∆ = ?

We know that,

W 100
∆V= = =5V
q 20

The potential drop between the two points is 5V.

Example 5:

Compute the work done in moving a charge of 2C from the point at

118V to a point at 128V?

Solution:

Given, charge, = 2

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