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The magnetic circuit shown in figure 1.17 has a mean core length of 52 cm and a cross-sectional area of 18 cm^2. The length of the air gap is 0.14 cm.
Determine the battery voltage required to obtain a flux density of 1.2 T in the air gap. Use the magnetization curve.
Measurements show that for a particular arrangement of the equipment and at a particular amplifier setting, the system will howl if 1% of the output power is fed back to the microphone. Estimate the power gain of the P.A. amplifier in decibels.
What do the letters PCM and PAM stand for? Why is PCM transmission preferred over PAM transmission? Give at least two reasons in your answer.
Transmit this data wirelessly to a base station for storage. How much bandwidth would you need.
Assessment on Electricity and Circuit Theory, What part of a cable are insulators and conductors? Describe, in terms of charged particles, why some objects are electrically attracted to each other, while others repel each other?
The transmission line has an impedance of 600 ohms and is terminated in a load of 600 ohms. The transmitter delivers an average power of 0.1 W to the input of the line.
Explain the structure and nature of the ionosphere with reference to daily, seasonal and long-term changes and explain the modes of propagation of radio waves of different frequencies
Apple A5 die size is 122mm^2 when fabricated in 45nm technology. Assume they purchase 300mm wafers at a foundry for $ 2.5K /wafer. Assume a yield of 70%. What is Apple's approximate die cost?
Hand calculate the expression for the voltage and current of the capacitor and plot these equations by using MATLAB and calculate the time constants of each circuit and point out this time constants at your voltage graphs.
What functions must the communications stations perform? Repeat for ring and star.
Find a possible series RL circuit equivalent to N.
Would you be willing to have a Smart Meter connected to your house and collecting your electric usage information and sharing it with your local utility company?
What is the maximum number of consecutive bits that are in error for a transmission through this channel if the data rate is 10Kbps? If the data rate is 11 Mbps?
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