EXAMPLE 31-5 ESTIMATE Phone call time lag. You make a telephone call from New York to a friend in London. Estimate how long it will take the electrical signal generated by your voice to reach London, assuming the signal is (a) carried on a telephone cable under the Atlantic Ocean, and (b) sent via satellite 36,000 km above the ocean. Would this cause a noticeable delay in either case?

EXAMPLE 31-5 ESTIMATE Phone call time lag. You make a telephone call from New York to a friend in London. Estimate how long it will take the electrical signal generated by your voice to reach London, assuming the signal is (a) carried on a telephone cable under the Atlantic Ocean, and (b) sent via satellite 36,000 km above the ocean. Would this cause a noticeable delay in either case?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter23: Electromagnetic Induction, Ac Circuits, And Electrical Technologies

Section: Chapter Questions

Problem 89PE: The capacitor in Figure 23.55(b) will filler high—frequency signals by shorting them to...

See similar textbooks

Similar questions

When a television news anchor in a studio speaks to a reporter in a distant country, there is sometimes a noticeable lag between when the anchor speaks in the studio and when the remote reporter hears it and replies. Explain what causes this delay.
€22. Verify, as was concluded without proof in Example 23.7, that units of
When you connect two loudspeakers to the output of a stereoamplifier, should you be sure the lead-in wires are equal inlength to avoid a time lag between speakers? Explain.
EXAMPLE 30-7. LC circuit. A 1200-pF capacitor is fully charged by a 500-V dc power supply. It is disconnected from the power supply and is connected, at t = 0, to a 75-mH inductor. Determine: (a) the initial charge on the capacitor; (b) the maximum current; (c) the frequency f and period T of oscillation; and (d) the total energy oscillating in the system.
EXAMPLE 30-7. LC circuit. A 1200-pF capacitor is fully charged by a 500-V dc power supply. It is disconnected from the power supply and is connected, at t = 0, to a 75-mH inductor. Determine: the total energy oscillating in the system.
Write Maxwell's equation for harmonically varying field. Which law is related to induced emf in a circuit? Determine the emf developed about the path r=1, z=0 and t=0 if B= 2 sin 377t wb/m2.
LC-circuit of the radio receiver consists of variable capacitor (Cmin= 1 pF, Cmax=10 pF) and inductor with inductance 1 µH. Determine the wavelength range of this radio receiver.
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 mean power of 7.00 kilowatts. What is the peak voltage generated in a circular loop antenna which is 28.0 cm in radius (also located 19.0 km away)?
EXAMPLE 30-8 Damped oscillations. At t = 0, a 40-mH inductor is placed in series with a resistance R = 3.00 Ω and a charged capacitor C = 4.8 μF. What value of R will make the circuit nonoscillating?
Referring to Example 23.14, find the average power at 10.0 kHz.
For an LC circuit, show that the total energy stored in the electric and magnetic fields is a constant given by Equation 33.28, Etot=Qmax2/2C=12LImax2.
In an oscillating LC circuit, the maximum charge on the capacitor is qm. Determine the charge on the capacitor and the current through the inductor den energy is shared equally between the electric and magnetic fields. Express your answer in terms of qm, L, and C.