Book: NCERT - Science
Chapter: 12. Electricity
Subject: Physics - Class 10th
Q. No. 2 of In Text Questions-Pg-218
Listen NCERT Audio Books - Kitabein Ab Bolengi
2
Compute the heat generated while transferring 96000 coulombs of charge in one hour through a potential difference of 50 V.
First of all we will calculate the current (I) by using the given values of charge (Q) and time (t). We know that:
Current 
We will now calculate the resistance by using Ohm's law:
Resistance, 
= 1.87
And, Time, t= 1h = 60x60s = 3600 s
Heat generated, H= 
= 
= 4788397J
= 
or 
Thus, the heat generated is 4.8 x 106 joules.
3
