Physics · Coupled Circuits
In a double-tuned transformer circuit, what specifically happens to the frequency response curve when the coefficient of coupling (k) is increased beyond the value of critical coupling?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The primary and secondary currents fall to zero due to phase cancellation.
- 2The circuit ceases to resonate and begins to behave as a purely resistive network.
- 3The response curve develops two distinct peaks with a dip at the resonant frequency, increasing the effective bandwidth.✓
- 4The bandwidth decreases significantly, leading to higher selectivity.
Correct answer
The response curve develops two distinct peaks with a dip at the resonant frequency, increasing the effective bandwidth.
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