In the double tuned circuit, if the mutual inductance between the two tuned circuits is decreased, the level of resonance curve ___________

The correct answer is: B. Is lowered.

A double tuned circuit is a type of resonant circuit that consists of two tuned circuits that are coupled together. The coupling between the two circuits can be either inductive or capacitive. The level of resonance of a double tuned circuit is determined by the mutual inductance between the two circuits. If the mutual inductance is decreased, the level of resonance will be lowered.

Here is a brief explanation of each option:

• Option A: Remains the same. This is not the correct answer because the level of resonance will be lowered if the mutual inductance is decreased.
• Option B: Is lowered. This is the correct answer because the level of resonance will be lowered if the mutual inductance is decreased.
• Option C: Is raised. This is not the correct answer because the level of resonance will be lowered if the mutual inductance is decreased.
• Option D: None of the above. This is not the correct answer because the level of resonance will be lowered if the mutual inductance is decreased.