Answer :

Here it is given that R1 = 40 ohms, R2 = 60 ohms, V = 220V, t = 30 sec

Here R1 and R2 are arranged in series connection.


So the equivalent resistance = R = 40+60 = 100 ohms


According to Ohm's law, we know that


V = IR


I = V/R


I = 220/100 = 2.2amp


As we know that heat produced in joules is given by H = I2Rt


Substituting the values of I, R and t in eq. H = I2RT


H = (2.2)2 X 100 X 30


H = 14520 J


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Heating Effect of Electric CurrentHeating Effect of Electric CurrentHeating Effect of Electric Current40 mins
Resistors in ParallelResistors in ParallelResistors in Parallel39 mins
Ohm's LawOhm's LawOhm's Law43 mins
Resistors in SeriesResistors in SeriesResistors in Series42 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses