Q. What is the dynamic impedance offered by ideal tank circuit?

A
Zero
B
Resistive
C
Infinite
D
None of these
Solution:
  • A tank circuit is an electrical circuit consisting of a capacitor connected to an inductor, by conducting wires that use magnetic resonance to store electrical energy oscillating at a certain resonating frequency.
  • It is used to produce electric oscillations of any desired frequency.
  • Dynamic impedance is the impedance offered at resonance.
  • A tank circuit is a parallel LC circuit. So dynamic impedance is infinite as at resonance the circuit become open circuit.
  • For ideal tank circuit R value is zero. Therefore dynamic impedance is infinite and dynamic admittance is zero.
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