34_Ch 18 College Physics ProblemCH18 Direct-Current Circuits

# 34_Ch 18 College Physics ProblemCH18 Direct-Current...

This preview shows page 1. Sign up to view the full content.

132 CHAPTER 18 18.55 (a) For the first measurement, the equivalent circuit is as shown in Figure 1. From this, 1 2 ab yy y RRRR R ==+= so 1 1 2 y RR = (1) For the second measurement, the equivalent circuit is shown in Figure 2. This gives 2 1 2 ac y x RR RR == + (2) Substitute (1) into (2) to obtain 21 11 22 x R  =+   , or 1 4 x R =− (b) If R , then 12 13 and 6.0 R =Ω = Ω 2.8 x R = Since this exceeds the limit of 2.0 , the antenna is inadequately grounded . 18.56 Assume a set of currents as shown in the circuit diagram at the right. Applying Kirchhoff’s loop rule to the leftmost loop gives
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 12/09/2011 for the course PHYS 2020 taught by Professor Staff during the Fall '10 term at FIU.

Ask a homework question - tutors are online