Q. 64.8( 4 Votes )

(a) An alternatin

Answer :

(i) Given that E = E0Sin(ωt)


I = I0Sin(ωt + π/4)


It can be seen from the above two equations that phase angle of current at any point is greater than that of voltage by an amount of π/4. This means current leads the voltage in the circuit. This happens in a capacitive circuit. Therefore the element in the black box is a capacitor.


(ii)




Vc = VR


Xc = R


Impedance Z =


Z = R√2


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