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1. A 4:1 voltage ‘ step-down ' transformer is connected to a 110 V a.c. supply. If the current drawn from this supply is 100 mA, calculate the secondary voltage, current and power.
2. A transformer has 450 primary turns and 80 secondary turns. It is connected to a 240 V a.c. supply. Calculate
(a) the secondary voltage, and
(b) the primary current when the transformer is supplying a 20 A load.
The electromagnetic wave that delivers a cellular phone call to acar has a magnetic field with an rms value of 1.38E-10 T. The wavepasses perpendicularly through an open window, the area of which is0.244 m2.
When the value changes from 0 to a nonzero value, the program increments a 16-bit counter and writes the counter value to output controller registers 12 (least significant byte) and 13 (most significant byte). The program should not terminate.
Determine the bandwidth of the modulator output if a power ratio, Pr, of 0.8 is needed. Repeat for a power ratio of 0.9.
Maximum charge on the globe. Calculate the maximum amount of charge that can be placed on the globe without causing breakdown in air. Assume a radius of 6400 km and breakdown occurs at 3 x 106 V/m.
You chanrge your capacitor above by connecting them to a non-ideal 30-Volt source with a Thevanin resistance of 5 ohm. Since you are careful not to go above the capacitor 25-V rating, design a circuit that can charge your capacitor safely at 25V
A cell phone transmits voice signals on a carrier. the transmissions lie inbetween 900MHz to 900.03MHz. What minimum sampling rate should be choosen so that the transmisions will be recoverable from the digital samles
Saw on internet some equations to convert from frequency in hertz to mph. Some equations need a gear ratio while others do not. I found the equation mph = circumference * RPM * 60.
Calculate the potential at the center of the charge distribution and calculate the magnitude and direction of the electrical force on unit length of wire.
find the current that flows in a silicon bar of 10 micrometerlength having a 5 X4 micrometer cross section and having freeelectron & hole densities of 10^5/cm^3 & 10^15/cm^3 ,respectively, when a 1V is applied end-to-end. Use Mn =1200cm^2/VS; Mp=5..
1. Test data Using the provided spreadsheet data from the tab names "test data", do the following: i) Create a new tab named "test data answers".
The time taken to download software from the internet is uniformly distributed between four and ten minutes. A. What is the probability that the downloading time for software is more than six minutes B. Prob that time is between five and eight minute..
Design a circuit to realize the transfer function below using only resistors, capacitors and not more than one OP AMP.
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