Question

please answer the following and show your work, thank you.

1. In a series resonant LC circuit, what is the impedance at resonant frequency?

a) determined solely by dc resistance

b) the maximum impedance value

c) zero

d) infinity

2. the reactance of a 25 millihenry coil at 5000 hertz is which of the following?

a) 0.0013 ohms b) 785 ohms c) 13 ohms d) 785,000 ohms

3. ignoring capacitive effects, what is the impedance of a 100 mH coil with an internal resistance of 45 ohms in parallel with a 4700 ohm resistor at a frequency of 500 Hz?

a) 237 ohms b)5014 ohms c) 317 ohms d) 314 ohms

4. Ignoring capacitive effects, what is the impedance of a 2.50 mH coil with an internal resistance of 55 ohms at 60 Hz?

a) 10,900 ohms b) 149.2 ohms c)109 ohms d) 94.2 ohms

Answer 1