PASSPOINTPRO
PHYS 112
GENERAL PHYSICS II
AC CIRCUITS &
ELECTROMAGNETIC
WAVES
100-Question Practice Test
100 81 19
QUESTIONS CALCULATION-BASED CONCEPTUAL
COVERAGE
RMS & peak quantities | Reactance | Series RLC circuits | Resonance
Phase & power | Transformers | Electromagnetic-wave calculations
Correct answer + detailed explanation after every question
PassPointPro | Focused practice. Clear reasoning. Confident preparation.
,PHYS 112 | GENERAL PHYSICS II FORMULA REFERENCE
Formula Reference
Core relationships used throughout this practice test
AC FUNDAMENTALS V_rms = V_peak / sqrt(2) I_rms = I_peak / sqrt(2) omega = 2 pi f T = 1/f
REACTANCE X_L = 2 pi f L X_C = 1/(2 pi f C)
SERIES RLC Z = sqrt[R^2 + (X_L - X_C)^2] I_rms = V_rms / Z
RESONANCE f_0 = 1 / (2 pi sqrt(LC))
PHASE & POWER tan(phi) = (X_L - X_C)/R P_avg = V_rms I_rms cos(phi)
TRANSFORMER V_s/V_p = N_s/N_p I_s/I_p = N_p/N_s
EM WAVES c = f lambda c approximately 3.00 x 10^8 m/s
USE NOTE
Use SI units unless otherwise stated. Positive net reactance is inductive; negative net reactance is capacitive.
PassPointPro | PHYS 112 General Physics II Page 2
,PHYS 112 | GENERAL PHYSICS II AC CIRCUITS & ELECTROMAGNETIC WAVES
Question 1 AC FUNDAMENTALS
A sinusoidal AC source has a peak voltage of 24 V. What is its rms voltage?
16.97 V
A
21.21 V
B
8.485 V
C
33.94 V
D
Answer: A
Explanation:
V_rms = V_peak/sqrt(2). V_rms = 24/1.414 = 16.97 V Therefore the correct choice is A.
Question 2 AC FUNDAMENTALS
An AC current has an rms value of 4.0 A. What is the peak current?
7.071 A
A
2.828 A
B
5.657 A
C
11.31 A
D
Answer: C
Explanation:
I_peak = sqrt(2) I_rms. I_peak = 1.414(4.0) = 5.66 A Therefore the correct choice is C.
PassPointPro | PHYS 112 General Physics II Page 3
, PHYS 112 | GENERAL PHYSICS II AC CIRCUITS & ELECTROMAGNETIC WAVES
Question 3 AC FUNDAMENTALS
An AC source operates at 100 Hz. What is its period?
0.005 s
A
0.010 s
B
0.013 s
C
0.020 s
D
Answer: B
Explanation:
T = 1/f. T = 1/100 = 0.01000 s Therefore the correct choice is B.
Question 4 AC FUNDAMENTALS
A sinusoidal AC source has a peak voltage of 240 V. What is its rms voltage?
212.1 V
A
169.7 V
B
84.85 V
C
339.4 V
D
Answer: B
Explanation:
V_rms = V_peak/sqrt(2). V_rms = 240/1.414 = 169.71 V Therefore the correct choice is B.
PassPointPro | PHYS 112 General Physics II Page 4
PHYS 112
GENERAL PHYSICS II
AC CIRCUITS &
ELECTROMAGNETIC
WAVES
100-Question Practice Test
100 81 19
QUESTIONS CALCULATION-BASED CONCEPTUAL
COVERAGE
RMS & peak quantities | Reactance | Series RLC circuits | Resonance
Phase & power | Transformers | Electromagnetic-wave calculations
Correct answer + detailed explanation after every question
PassPointPro | Focused practice. Clear reasoning. Confident preparation.
,PHYS 112 | GENERAL PHYSICS II FORMULA REFERENCE
Formula Reference
Core relationships used throughout this practice test
AC FUNDAMENTALS V_rms = V_peak / sqrt(2) I_rms = I_peak / sqrt(2) omega = 2 pi f T = 1/f
REACTANCE X_L = 2 pi f L X_C = 1/(2 pi f C)
SERIES RLC Z = sqrt[R^2 + (X_L - X_C)^2] I_rms = V_rms / Z
RESONANCE f_0 = 1 / (2 pi sqrt(LC))
PHASE & POWER tan(phi) = (X_L - X_C)/R P_avg = V_rms I_rms cos(phi)
TRANSFORMER V_s/V_p = N_s/N_p I_s/I_p = N_p/N_s
EM WAVES c = f lambda c approximately 3.00 x 10^8 m/s
USE NOTE
Use SI units unless otherwise stated. Positive net reactance is inductive; negative net reactance is capacitive.
PassPointPro | PHYS 112 General Physics II Page 2
,PHYS 112 | GENERAL PHYSICS II AC CIRCUITS & ELECTROMAGNETIC WAVES
Question 1 AC FUNDAMENTALS
A sinusoidal AC source has a peak voltage of 24 V. What is its rms voltage?
16.97 V
A
21.21 V
B
8.485 V
C
33.94 V
D
Answer: A
Explanation:
V_rms = V_peak/sqrt(2). V_rms = 24/1.414 = 16.97 V Therefore the correct choice is A.
Question 2 AC FUNDAMENTALS
An AC current has an rms value of 4.0 A. What is the peak current?
7.071 A
A
2.828 A
B
5.657 A
C
11.31 A
D
Answer: C
Explanation:
I_peak = sqrt(2) I_rms. I_peak = 1.414(4.0) = 5.66 A Therefore the correct choice is C.
PassPointPro | PHYS 112 General Physics II Page 3
, PHYS 112 | GENERAL PHYSICS II AC CIRCUITS & ELECTROMAGNETIC WAVES
Question 3 AC FUNDAMENTALS
An AC source operates at 100 Hz. What is its period?
0.005 s
A
0.010 s
B
0.013 s
C
0.020 s
D
Answer: B
Explanation:
T = 1/f. T = 1/100 = 0.01000 s Therefore the correct choice is B.
Question 4 AC FUNDAMENTALS
A sinusoidal AC source has a peak voltage of 240 V. What is its rms voltage?
212.1 V
A
169.7 V
B
84.85 V
C
339.4 V
D
Answer: B
Explanation:
V_rms = V_peak/sqrt(2). V_rms = 240/1.414 = 169.71 V Therefore the correct choice is B.
PassPointPro | PHYS 112 General Physics II Page 4
