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B
Frequency w=√1LC−R2L2
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C
If R>LC
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D
Given circuit can never be purely resistive.
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Solution
The correct option is B Frequency w=√1LC−R2L2 1z=1z1+1z2=1wLj+R+11jwc⇒ 1z=R−wLjR2+w2L2+jwc
For pure resistive circuit wc=wLR2+w2L2
So w2=1LC−R2L2⇒w2=1L2(LC−R2)
So, there exists a real value of w which satisfies this equation when LC>R2.