1i think it is D)
hey friends.... plz help me put in this q from arihant objectives.... of alternating current.....
As the frequency of the alternating current is increased , the impedence of the circuit
(a) increases continuously
(b) decreases continuously
(c) remains constant
(d) none of the above.
i cud understand.....
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6 Answers
1which circuit are u talkin abt????????
eg, in r circuit impedence doesnt depend on w........
1ya the ans is (D)... but i cudn't understand......
nd lanuk..... whtever q was mentioned in the buk... i've written dat.... i did not gave ne idea abt the type of the circuit......
so plz think abt it.....
1ok let me give explanation.....
impedence={R2+ (Xc-XL)2}1/2
XL=L2nv , v-frequency
xc=1/2nvc
now if v increases XL increases AND xc decreases . so impedence decreases at a particular resonant frequency xL=xc and later on XL>xc and impedence increase again ,looking at the equation...
so impedence decreases and then increases .........
1kk.. bt if say d circuit is only r circuit , wouldnt d impedence be constant????(z=R)
1ya....dat tym Z = R... which is the case of maximum current or the case of resonance.....
nd thanks nihal 4 da explanation.....