For the parallel resonant circuit of inductor coil and capacitor, the higher the resistance is, the higher the power factor is, and the higher the quality factor is（

For the parallel resonant circuit of inductor coil and capacitor, the higher the resistance is, the higher the power factor is, and the higher the quality factor is（

For the parallel resonant circuit of inductor coil and capacitor, the higher the resistance, the higher the power factor and the lower the quality factor?

After an inductive coil is short circuited, it will take 0.1s to reduce the current in the coil to 37% of the initial value. If a resistor with r = 5 ohm is used
It takes 0.05s to reduce the current in the coil to 37% of the initial value instead of short circuit connection. What is the resistance and inductance of the coil?

RL circuit after a time constant time, the current decay to 37% of the initial value
L/R=0.1
L/(R+5)=0.05
L=0.1R
L=0.05(R+5)
0.1R=0.05(R+5)
R = 5 ohm
L = 0.5