## PHYS208 Fundamentals of Physics II

### Hint for Ch. 33, 55P

Use L and C to find the resonant frequency; evaluate the inductive reactance and multiply by the current at resonance to find the voltage magnitude across the inductor.

### Hint for Ch. 33, 56P

Evaluate the inductive and capacitive reactances and determine the resistance necessary for a phase angle of 75 degrees to result.

### Hint for Ch. 33, 58P

a) - c) Apply Eqn. 33-34, 33-42, 33-52, and 33-54 from HRW.

d) - f) Consider the forms of Eq. 33-34, 33-52, and 33-54.

### Hint for Ch. 33, 61P

1. From the equation for the resonant frequency and the stated value, find an expression involving L and C.

2. From the equation for the impedance and the stated value, find an expression involving R, L, and C.

3. From the equation for the power factor and the stated phase factor, find another expression involving the circuit parameters.
Solve simultaneously for the values of all circuit elements.

### Hint for Ch. 33, 63P

a) Solve for the added capacitance that will equate the capacitive reactance to the inductive reactance.

b) At resonance, Z = R.

"http://www.physics.udel.edu/~watson/phys208/exercises/hints/0508.html"
Last updated May 7, 1998.
Copyright George Watson, Univ. of Delaware, 1998.