In figure (i), the value of net resistance R=2 ΩIn figure (ii), the value of net resistance R= 4 ΩIn figure (iii), the value of net resistance R = 1ΩHeat is given by the formula: H = (V2× Time) /RSince net resistance is minimum in figure (iii) and heat dissipated is inversely proportional to the resistance, so Heat dissipated will be maximum in case (iii)

Q. 23.6( 42 Votes )

B. minimum in case (i)

C. maximum in case (ii)

D. maximum in case (iii)

Class 10th NCERT - Science Exemplar 12. Electricity

Answer :

In figure (i), the value of net resistance R=2 Ω

In figure (ii), the value of net resistance R= 4 Ω

In figure (iii), the value of net resistance R = 1Ω

Heat is given by the formula: H = (V²× Time) /R

Since net resistance is minimum in figure (iii) and heat dissipated is inversely proportional to the resistance, so Heat dissipated will be maximum in case (iii)

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