a. What is resonance in an LCR circuit?
b. How can we increase current in a series LCR circuit at resonance for same as supply?
c. Q value of a good medium wave receiver must be approximately 100. Why?
a. when 
b. By decreasing the resistance of the circuit.
c. If Q value is very low, the maximum current is obtained for a range of frequencies of the signal. Therefore the receiver will have poor selectivity.
If Q value is a very high quality of reception will be low because the maximum current is obtained in the LCR circuit only at a sharp value of frequency.
