In the adjoining figure the impedance of the circuit will be Options: A . &nbsp120 ohm B . &nbsp50 ohm C . &nbsp60 ohm D . &nbsp45 ohm

Answer: Option D : D i L = 90 30 = 3 A , i c = 90 90 = 1 A Net current through circuit i = i c − i L = 2 A ∴ Z = V i = 90 2 = 45 Ω

In the adjoining figure the impedance of the circuit will be

Question

In the adjoining figure the impedance of the circuit will be

Options:

A . 120 ohm

B . 50 ohm

C . 60 ohm

D . 45 ohm

Answer: Option D
:
D

i_{L} = \frac{90}{30} = 3 A,

i_{c} = \frac{90}{90} = 1 A

Net current through circuit

i = i_{c} - i_{L} = 2 A

∴ Z = \frac{V}{i} = \frac{90}{2} = 45 Ω

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