Question

Draw graph for ac voltage and time for ac

Answer 1

Answer:

(a) Here V=V

0

sinωt

I=I

0

sin(ωt+

2

π

)

Since current is leading the voltage by

2

π

, hence the circuit must be capacitive and the element "X" must be a capacitor.

Its reactance is given by X

c

=

ωC

1

(b)

Image result for capacitive circuit

(c) Since X

c

=

2πfC

1

X

c

∝

f

1

Hence, reactance is inversely proportional to the frequency.

Related image

(d) Image result for phasor diagram for capacitive circuit