1.

of200Cflows through the filament of electric bulb of resistance 20 2 for 25 s. Calculaie(a) A chargethe potential difference across the bulb.h for series and parallel combination of two metallic resistors is shown in the(b)figure. Which graph represents parallel combination? Justify your answer(1%+1-3)

Answer»

Potential difference V=I R

And we also know that,the electric charge is given by: Q = I ∙ t.

or I=Q/t

So V=(Q/t) x R=(200/25) x 20=160V

The slope of the V-I graph gives the effective resistance in the circuit. For a give set of resistors, the parallel combination will have less resistance than the series combination. As the slope of the line A is less than the slope of B, line A represents the parallel combination



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