a. A 1000-Hz bridge has the following constants: arm AB, R= 10000 in parallel with C=0.5 F; BC, R=1000 Q in series with C=0.5 F; CD, L=30 mH in series with R=2000. Find the constants of arm DA to balance the bridge. (2 marks) null b. Express the result as a pure R in series with a pure C or L.(2 marks)