PHY 204 CERTIFICATION EVALUATION EXAMS 2026 FULL SOLUTION 100% CORRECT.

PHY 204 CERTIFICATION EVALUATION
EXAMS 2026 FULL SOLUTION 100%
CORRECT.



◍ From Figure 1, the magnitude of the total impedance of the circuit
is
a) 500 Ω b) 200 Ω c) 5 mΩ d) 2 mΩ Answer: a) 500 Ω


◍ The RMS current in Figure 1 is about
a) 20.0 mA b) 10.0 mA c) 14.14 mA d) 7.07 mA Answer: d) 7.07 mA


◍ What is the frequency of the EMF (or the current) in Figure 1?
Answer: f = 1/T = 1000 Hz


◍ A capacitor temporarily stores energy in
a) an electric field
b) a magnetic field
c) heat
d) chemical form Answer: a) an electric field


◍ An inductor temporarily stores energy in
a) an electric field
b) a magnetic field

,c) heat
d) chemical form Answer: b) a magnetic field


◍ A capacitor can to filter out
a) high voltages
b) low voltages
c) high frequencies
d) low frequencies Answer: d) low frequencies


◍ An inductor can filter out
a) high voltages
b) low voltages
c) high frequencies
d) low frequencies Answer: c) high frequencies


◍ The AC equivalent of resistance for inductors or capacitors, that
examines the ratio of the RMS
voltage to the RMS current, is called
a) defiance
b) tenacity
c) intransigence
d) reactance Answer: d) reactance


◍ The reactance is most generally __.

, a) a positive real number
b) a real number that is not necessarily positive
c) a positive integer
d) a complex number
e) a matrix Answer: a) a positive real number


◍ The impedance is most generally __.
a) a positive real number
b) a real number that is not necessarily positive
c) a positive integer
d) a complex number
e) a matrix Answer: d) a complex number


◍ In the RLC experiment, the resonant frequency was determined
a) almost entirely or entirely by R and C
b) almost entirely or entirely by R and L
c) almost entirely or entirely by C and L
d) by R, L, and C, with all three being important Answer: c) almost
entirely or entirely by C and L


◍ In order to vary the sharpness of the RLC resonance, you varied
a) the resistor
b) the capacitor
c) the inductor