Physics, asked by mallasurekaveri, 11 months ago

In the pic above, is the answer correct? If yes please explain how beacuse by joule's law of heating heat produced is directly proportional to resistance. I will mark as brainliest...

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Answers

Answered by MidA

Solution:

in all the circuits, voltage is same , i.e. V = 12 V

And so,

heat = (V^2)t / R ....... (1)

heat is inversely proportional to resistance taking V and t same for all circuits.

in circuit (i) -. R = 2 ohm

in circuit (ii) -. R = 4 ohm (series)

in circuit (iii) -. R = 1 ohm (parallel)

hence, heat will be maximum in circuit (iii)..

mallasurekaveri: what abt that

MidA: here, V is same for all. so I have taken this relationship

mallasurekaveri: acc. to that circuit (ii) produces most heat

mallasurekaveri: ok thanks for answer

MidA: you are right, but if you finding current then you should consider resistance that is also different for different circuits given here

mallasurekaveri: oh right

mallasurekaveri: thank u so much

MidA: in joules heating equation, if resistances are same then heat will be directly proportional to current or vice-versa.

MidA: welcome

mallasurekaveri: ok

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