Q-Factor
“The quality factor or Q factor is a dimensionless parameter that describes how underdamped an oscillator or resonator is. It is defined as the ratio of the peak energy stored in the resonator in a cycle of oscillation to the energy lost per radian of the cycle.
 
Q- factor = Current magnification = 
 
Power Factor
“The It is defined as the cosine of angle between voltage and current. Power Factor = p.f. = , where,  is the angle between voltage and current.
 
Form Factor
It is defined as the ratio of rms value to average value of an alternating quantity. It is denoted by . Form factor  for sine wave