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An 11000V/230 V. 50 Hz, single phase, core type transformer has a core section 25cm X 25cm. Allowing for a space factor of 0.9, find the suitable number of primary and secondary turns, if the flux density is not to exceed 1.2 T.
Find the expression for the total equivalent capacitance for an array of n capacitors with arbitrary capacitance C1,C2,...,Cn; when they are connected a) inseries and b) in parallel.
A CG amplifier when fed with a signal source having Rsig = 200 ohms is found to have an overall voltage gain of 10V/V. When a 200 ohm resistance is added in series with the signal generator the overall voltage gain decreased to 8V/V.
A 9-V flashlight battery has a rating of 1.8 kWh. If the bulb draws a current of 100 mA when lit, determine the following: (a) For how long will the flashlight provide illumination (b) How much energy in joules is contained in the battery
Design a digital security system for a four-door sedan car. There are sensors on all doors, hood, gas cover, and the trunk. When the car is locked, an alarm will sound if somebody tries to force open the door, hood, gas cover, the trunk, or tries ..
two identical CE amplifiers are connected in cascade. The first stage is fed with a source eVsig having a resistance Rsig= 10k ohms. A load resistance Rl=10K ohms and is connected to the collector of the 2nd stage.
If the voltage drop across the capacitor is 115 volts and the power taken by the circuit is 922 watts, calculate a) the circuit current, b) the ohmic value of the resistor, c) the line voltage, d) the circuit power factor
Explain the concept of Envelope detection for Large Carrier AM. Why is Large Carrier preferred over Suppressed Carrier method for Double Sideband AM in broadcast environment.
Let us assume that a synchronouse 3 phase alternator produces a no-load line voltage of 13.2 KV. if a load having a lagging power factor of 0.8 is connected to the machine, must the excitation be increased or decreased
Suppose that OFDM is used with 15 kHz subchannels. (Two subchannels are used as guard channels on either side of the band.) Specify an OFDM symbol rate and modulation format for each subchannel that can achieve the target rate.
A in which t is in seconds and the angle is in radians. a. Sketch i(t) to scale versus time for t ranging from 0 to 15ms. B. Determine the net charge that passes through the element between t = 0 and t = 10ms. C. repeat for the interval to t = 15m..
Let X denote the number of accepted circuits. Let Y be a random variable which is 1 if the last (Nth ) IC was accepted and is zero otherwise (it is a Bernoulli random variable). (a) Write out the probability mass function (PMF) of X.
One end of a long glass rod (n = 1.3) is a convex surface of radius 4.9 cm. An object is located in air along the axis of the rod, at a distance of 10 cm from the convex end. (a) How far apart are the object and the image formed by the glass rod
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