Question

PLEASE ANSWERS TO ALL QUESTIONS NEEDED, THANKS

Problem 13.10(a)
Purpose: This is to help familiarize you with characteristics of electromagnetic waves.
Problem: An electromagnetic wave travels in the z direction. The electric field in the wave is given by the expression E(z,t) = E0cos(kz-ωt)y. (Bold letter are vectors.) At z = 0 and t = 0, in what direction does the magnetic field point?
Hints:     Remember that E crossed into B gives the direction of travel.
Enter your answer, then click on Submit. A. x B. –x C. y D. –y E. z F. –z

Problem 13.10(b)
Purpose: This is to help familiarize you with characteristics of electromagnetic waves.
Problem: The electric field in an electromagnetic wave is given by the expression E(z,t) = E0cos(kz-ωt). What is the magnetic field, B(z,t)? Do not enter B(z,t) as a vector. Express your answer in terms of E0, k, z, ω, t, and c.
Defined symbols:    E0 the magnitude of the electric field    k the wavenumber    z the position    omega the angular frequency    t the time         The answer is B, the magnetic field B(z,t)
Hints:
Enter your answer, then click on Submit.    B =

Problem 13.11(a)
Purpose: This problem deals with basics of electromagnetic waves.
Problem with data for try #1: Electromagnetic radiation has a frequency of 2.49×1018 Hz. What is its wavelength?
Defined symbols:    f the frequency of the electromagnetic wave    The answer is lambda, the wavelength in nm (10–9 m)
Hints:     Range of answers: 0.10 nm to 0.20 nm
Enter your answer, then click on Submit.    lambda =

Problem 13.11(b)
Purpose: This problem deals with basics of electromagnetic waves.
Problem: In what part of the electromagnetic spectrum does the wave of part (a) lie?
Hints:
Enter your answer, then click on Submit. A. radio B. microwave C. infrared D. visible E. ultraviolet F. X-ray G. gamma-ray

Problem 13.12(a)
Purpose: This problem relates to radio waves and tuning circuits.
Problem with data for try #1: An FM station broadcasts at a frequency of 100.0 MHz. What is the angular frequency of this signal?
Defined symbols:    f the frequency of the electromagnetic wave in MHz    The answer is omega, the angular frequency of the signal in rad/s
Hints:     Range of answers: 5.00 × 108 rad/s to 7.00 × 108
Enter your answer, then click on Submit.    omega =

Problem 13.12(b)
Purpose: This problem relates to radio waves and tuning circuits.
Problem with data for try #1: An FM station broadcasts at a frequency of 100.0 MHz. If the tuning circuit employs a 0.300 μH inductor, what capacitance is required?
Defined symbols:    f the frequency of the electromagnetic wave in MHz    L the inductance in μH    The answer is C, the capacitance in pF (1 pf = 10–12F)
Hints:     Recall the condition for resonance in RC circuits     Range of answers: 8 pF to 12 pF
Enter your answer, then click on Submit.    C =

Problem 13.13
Purpose: This is a problem dealing with transmission rates.
Problem: An X-ray has a wavelength of 0.120 nm. Approximately how many bits per second (baud) could be transmitted on this wave?
Hints:     Recall that you can put approximately one bit of information in one cycle of a wave.
Enter your answer, then click on Submit. A. 1021 B. 1018 C. 1015 D. 1013 E. 109 F. 42

Problem 13.14(a)
Purpose: This problem deals with the transmission of polarized light through polarizers.
Problem with data for try #1: Polarized light passes through a polarized filter. The angle between the polarizer's direction (the direction of polarization when unpolarized light enters the polarizer) and the direction is 38.0°. What percentage of the incident light's intensity is transmitted?
Defined symbols:    theta the angle between the polarization direction and the polarizer's direction    The answer is Pct, percentage of the incident light transmitted
Hints:     Remember to convert to radians     Range of answers: 50% to 90%
Enter your answer, then click on Submit.    Pct =

Problem 13.14(b)
Purpose: This problem deals with the transmission of polarized light through polarizers.
Problem: At sunset you are outside, standing near a store window. You are not directly between the sun and the window. The light you see reflected off the glass is best described by which of the following?
Hints:
Enter your answer, then click on Submit. A. unpolarized B. vertically polarized C. horizontally polarized D. circularly polarized E. economically polarized

Answer 1

Please post the others question separately