Question

A potential difference of 250 volt is applied across a resistance of 500 ampere in an electric iron calculate (a) current, (b) heat energy produced in joule in 10 second

Answer 1

V-250v

R-500ohm

i-v/r--250/500--1/2--0.5A

H--i2 rt t--10

H--(0.5) *500*10

H--0. 25*500*10

--1250J

Hope it will help you

Answer 2

Given:

• Potential difference = 250 V
• Resistance = 500 ohm

To find:

• Current in circuit ?
• Heat energy in 10 seconds?

Calculation:

As per Ohm's Law, we can say :

$V = i \times R$

$\implies \: i = \dfrac{V}{R}$

$\implies \: i = \dfrac{250}{500}$

$\implies \: i = 0.5 \: ampere$

Now, heat produced in 10 seconds is :

$H = {i}^{2} \times R \times T$

$\implies H = {(0.5)}^{2} \times 500 \times 10$

$\implies H = 0.25 \times 500 \times 10$

$\implies H = 1250 \: joule$

So, heat produced in given time is 1250 Joule.