(Solved):   Answer the option please do all its just mcqs. Given the following parameters, determine th ...

 

Answer the option please do all its just mcqs.

Given the following parameters, determine the correct sinusoidal equation for a sine wave: \( f=160 \mathrm{kHz}, \mathrm{A}=1.5 \mathrm{v}, \varphi( \) phase angle) \( =+\pi / 2 \) radians. a. \( 1.5 \sin (2 \pi 160 t-\pi / 2) \) b. \( 1.5 \sin \left(2 \pi 160 \mathrm{E} 3 \mathrm{~Hz}^{*} \mathrm{t}+\pi / 2\right) \) c. \( 160 \sin (2 \pi 3 t+\pi / 2) \) d. \( 160 \sin \left(2 \pi 1.5 \mathrm{t}-90^{\circ}\right) \) QUESTION 8 Identify the correct equation that describe the relationship between a sine and cosine wave. a. \( v(t)=A \sin (2 \pi f t+\pi / 2)=A \cos (2 \pi t) \) b. \( v(t)=A \sin (2 \pi f t)=A \cos (2 \pi f t+\pi / 2) \) c. \( v(t)=A \sin (2 \pi f t)=A \cos (2 \pi f t) \) d. \( v(t)=A \sin (2 \pi f t-\pi / 2)=A \cos (2 \pi f t) \) QUESTION 9 Select the correct statement(s) regarding AC signals. a. both current and voltage change over time b. AC can be represented as either a periodic or aperiodic wave c. in a sinusoidal circuit, voltage may be out-of-phase from the current waveform d. all statement are correct The time varying components of capacitance and inductance results in reactive power elements that can decrease power transfer. True False QUESTION 11 Select the correct statement(s) regarding impedance in a communications circuit. a. capacitance and inductance changes with signal frequency b. impedance is comprised of only real resistive components c. the greater the reactance in a circuit, the better the circuit d. all are correct statements QUESTION 12 Select the correct statement(s) regarding EM waves. a. EM depolarization enables frequency reuse b. RHCP and LHCP are EM waves that are considered linearly polarized c. RHCP or LHCP waves can be created by transmitting the same signal, separated by 90 degrees, using orthogonal polarizations d. all of the statements are correct QUESTION 13 In unguided medium (free space), the electromagnetic \( (\mathrm{EM}) \) signal wave spreads as it leaves the transmit antenna. Since the power of the signal resides at the surface area of the wave front, signal power is described as signal power density (i.e., watts per area). As the signal propagates away from the transmitter, power density decreases, and attenuation is experienced. True False