A maxwell bridge is a modification to a wheat store bridge used to measure an unknown inductance (usually of low Q) in terms of calibrated Resistance and inductance or Resistance and Capacitance. The balance condition for maximum bridge is given as Z1Z4=Z2Z3 Z1=Rx+jωLx Z2=200Ω Z3=750Ω Z4=R4∣∣(jωC4)=4000∣∣