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  • In the following circuits (Figure 12.2), heat produced in the resistor or combination of resistors connected to a 12 V battery will be  Fig 12.2 (a) same in all the cases  (b) minimum in case (i)  (c) maximum in case (ii)  (d) maximum in case (iii)

In the following circuits (Figure 12.2), heat produced in the resistor or combination of resistors connected to a 12 V battery will be 

(a) same in all the cases 
(b) minimum in case (i) 
(c) maximum in case (ii) 
(d) maximum in case (iii)

Answers (1)

Answer: (d)

Solution:
(i) Net resistance, R_{1}=2\Omega
(ii) Net resistance, R_{2} = (2 + 2) \Omega (In series)
R_{2} = 4 \Omega
(iii) Net resistance, 1/R_{3} = (1/2 + 1/2) \Omega (In parallel)
R_{3} = 1 \Omega
As we know that heat produced is inversely proportional to the resistance.
So, heat produced will be maximum in (iii) and minimum in (ii)
Therefore, option (d) is correct.

Posted by

infoexpert26

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