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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.
When electros and holes are present in a semi-conductor, the presence of an electric field produced by an external voltage will cause this carries,which have changes of oposite sign, to move in opposite directions.
You are designing a general purpose integrated circuit oscillator that will operate at various frequencies, based on the external reactancesthe user supplies. You expect that the IC will be used as afixed frequency oscillator in portable equipment..
At the instant shown, car A has a speed of 20km/h, which isbeing increased at a rate of 300km/h2 as the car entersan expressway. At the same instant, car B is decelerating at250 km/h2 while traveling forward at 100 km/h.
Consider a VBE multiplier with R1=R2= 1.2k ohms utilizing a transistor that has VBE= 0.6V at Ic = 1ma, and a very high beta. (b) Find the value of the current I that will result in the terminal voltage changing (from the terminal voltage 1.2-v val..
A certain automated data-logging instrument has 16K-words of on-board memory. The device samples the variable of interest once every five minutes. How often must data be downloaded and the memory cleared in order to avoid losing any dat
Find the inverse z-transform, x(n), of the following functions by bringing them into a form such that you can look up the inverse z-transform from the tables. This will require some algebraic and /or trigonometric manipulation/calculation.
A manufacturing plant has a 600V, 60Hz supply and the following loads: Lights: 24kW Electric furnace: 4.8 + j6.4 with a current of 150A Motor loads, 160kW at 0.8 Power Factor, lagging. What is the real power, reactive power, and aparent power
This will allow us to represent 256 numbers in that range, and there are only 6 integers in that range, so we'll be able to represent 250non-integral values, such as, perhaps, 2.5. Assume we will use a representation with 0xff representing 5 and 0..
For each of the signals given, determine mathematically whether the signal is even, odd, or neither
Simplify the equation using karnaugh map method and draw the resulting circuit.
Calculate the midband voltage gain. - What are the open-circuit and short-circuit time constants? - Determine CC and CL.
A 30kVA, 50 Hz, 4 pole alternator connected to an infinite bus at rated voltage has Xd = 1.00pu and Xq = 0.6 pu. For zero excitation find the output interms of rated power that the machine can deliver without loss of synchronism.
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