Q9 of 36 Page 1

Two unequal resistances are connected in parallel. If you are not provided with any other parameters (eg. numerical values of I and R), what can be said about the voltage drop across the two resistors?

OR


Some work is done to move a charge Q from infinity to a point A in space. The potential of the point A is given as V. What is the work done to move this charge from infinity in terms of Q and V?


In parallel, combination the voltage across all the branches is the same. therefore for the two resistors voltage-drop is the same across both of them.


OR


The work done to move a charge from point ‘1’ to ‘2’, is given as


W = Q ( V2 - V1)


The potential at infinity is taken as zero by convention. In this case the potential of point ‘2’ or A according to question is V, then


W=Q(V - 0)


W=QV


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