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1. Calculate the current required in a 500 turn coil to produce an electric field strength of 4000 At/m in an iron circuit of mean length 25 cm.
2. A 400 turn coil is wound onto an iron toroid of mean length 18 cm and uniform csa 4.5 cm2. If a coil current of 2.25 A results in a flux of 0.5 mWb, determine
(a) the mmf,
(b) the flux density,
(c) the magnetic field strength.
determine the phase noise (in dBc/Hz) at the following frequencies:
Consider the full wave rectifier circuit as shown below, where R=1k-ohm, C= 100 F. If the input voltage Vin = 24 V(peak to peak), Frequency=1k Hz, transformer turns ratio is 1.
What is the frequency of rotor voltages at no-load and at full-load?
Assume that the memory locations M[$20], M[$21] and M[$22]. Write a 68HC11 assembly language program (with lots of comments) that will determine the sum of the largest two numbers and store its value in M[$23].
An amplifier has three stages A,B and C of voltage gains 200, 300 and 400 respectively.find the overall gain in ratios
A separately excited DC motor fed through asingle phase semi- converter runs at a speed of 1200 rpm when Acsupply voltage is 230V, 50 Hzs and the motor counter emf is 140v.The firing angle delay is 50 degree .
Determine the rms values of the currents Is, IR, and IL. - Plot is, iR, and iL versus time on separate plots. - Place e, is, iR, and iL on the same plot, and label accordingly.
An electric pencil sharpener is rated 240 mW, 6 V is connected to a 9-V battery and a series-dropping resistor Rx needed to power the sharpener. Calculate the value of the series-dropping resistor Rx needed to power the sharpener.
Four l-byte numbers are stored in memory from addresses 0x0200 to0x0203. Write an AVR assembly program that counts the number of bits that are 0 ineach of these four bytes and stores the counts for each byte in memory from addresses0x300 to 0x..
explain from an atomic viewpoint why the charges that are transferred during the buildup of electrostatic charges
What sort of waveform does the input signal have? Is the input signal periodic or non-periodic? If the input waveform is non-periodic, what is its pulse width?
A simple power system consists of a dc generator connected to a load center via a transmission line. The load power is 100kW. The transmission line is 50km copper wire of 3 cm in diameter. If the voltage at the generator terminals is 400V
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