Most Important Selected Qs for JEE AdvancedPhysicsCurrent Electricity

Figure shows an automobile circuit. How much power (in watt) is dissipated by the automobile circuit when switches A , B , C and D are all closed.

Correct answer

Step-by-step solution

All the elements of circuit are in parallel arrangement aligned & 1 R_ e q = 1 40 + 1 40 + 1 40 + 1 40 + 1 20 + 1 20 = 4 40 + 2 20 ; R _ eq =5 ; Power = V ^2 / R =5 ~W & ~m = 3360 4200 =0.8 ~kg & vol. = m p = 0.8 1000 ~m ^3=0.8 l aligned

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