Question

How much work is done in moving a charge of 2 coulombs from a point at 118 volts to the point at 128 volts.

Answer 1

✬ Work done = 20 Joules ✬

Explanation:

Given:

• Charge moved , Q = 2 coulombs.
• Point from charge moved = 128 volts to 118 volts.

To Find:

• How much work (w) is done ?

Formula to be used:

• V = W/Q

• Here, V = Potential difference
• W = Work done
• Q = Charge

Solution: Let's find the potential difference. Let the points be V¹ from where charge moved to point V².

➟ Potential difference = V² – V¹

➟ V = ( 128 – 118 ) volts

➟ V = 10 volts

Putting these values on formula:-

$\implies{\rm }$ V = W/Q

$\implies{\rm }$ 10 = W/2

$\implies{\rm }$ 10 $\times$ 2 = W

$\implies{\rm }$ 20 J = Work done

Hence, the work done is 20 Joules.

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★ Important terms ★

➼ The difference in electric potential between two points is called potential difference.

➼ S.I units of potential difference is volt denoted be V.