Question

-8. Impedance of the following circuit will be :
200 Ω
150 Ω
(1) 150Ω (2) 2009
(3) 250Ω (4) 340Ω​

Answer 1

Answer:

150 it’s the answer of this question

Answer 2

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Impedance of the following circuit will be :

Answer:

Impedance of the circuit is 250 ohms.

Explanation:

Given that :

• Resistor, R = 200 ohms and Inductor, L = 150 ohms are in series combination and is excited by A.C. source.

Solution :

• Voltage in resistance when excited by A.C. source is in same phase.
• Voltage in inductor when excited by A.C. source leads current by 90⁰ phase.
• In phasor notation, Resistance, R = 200 ohms and Inductive Reactance, χl = j 150 ohms.
• j denotes that voltage leads by 90⁰ phase.
• Impedance, Z of the circuit is given by :

$Z = \sqrt{ {R}^{2} + {χl}^{2} } \\ = \sqrt{ {(200)}^{2} + {(150)}^{2} } \\ = \sqrt{40000 + 22500} \\ = \sqrt{62500} \\ Z = 250 \: ohms$

• Hence, Impedance of the circuit is 250 ohms.