Television Broadcast Antenna A radio broadcast antenna is located at the top of

Question

Television Broadcast Antenna A radio broadcast antenna is located at the top of a steep tall mountain. The antenna is broadcasting 104.3 FM (in Megahertz) with a power of 5.00 kilowatts. What is the peak intensity of the signal at a receiving antenna located 14.0 km away? 2.03x10-6 w/m*2 4pts You are correct. Your receipt no. is 154-4946evious Tries What is the peak voltage generated in a straight wire antenna which is 1.40 m long (also located 14.0 km away)? 1.9e-2 V 4pts Submit Answer Incorrect. Tries 4/12 Previous Tries What is the peak voltage generated in a circular loop antenna which is 18.0 cm in radius (also located 14.0 km away)? 0.003 V 4pts Submit Answer Incorrect. Tries 1/12 Previous Tries

Explanation / Answer

a) I = P / A = 5000 / (4 pi * 140002)

= 2.03 * 10-6 W/m2

b) I = Emax2 / 2 c mu0

Emax = sqrt [2 * 2.03 * 10-6 * 3 * 108 * 4 pi * 10-7] = 0.0391 V/m

peak voltage = E d = 0.039 * 1.4

= 0.0547 V

c) B = E / c = 0.0391 / (3 * 108) = 1.3 * 10-10 T

w = 2 pi f = 2 pi * 104.3 * 106 = 6.55 * 108 rad/s

peak voltage = B A w = pi * 0.18 * 1.3 * 10-10 * 6.55 * 108

= 8.66 * 10-3 V = 0.00866 V

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.