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Q. Consider the circuit shown in Figure.
(a) Given v(t) = 10e-t V, find the current source is(t) needed.
(b) Given i(t) = 10e-t A, find the voltage source v (t) needed.
Give four examples of natural insulating materials. Illustrations of the natural insulating materials are rubber, cotton, wood and mica.
Q. A sample of iron having a volume of 20 cm is subjected to a magnetizing force varying sinusoidally at a frequency of 400 Hz. The area of the hysteresis loop is found to be 80 cm
Q. Motoring mode of rotating machines? The motoring mode has electric power input and mechanical power output. The electromagnetic torque Te drives the machine against the load
a cast steel has minimun diameter of 200 mm and a cross sectional area of 250/1000000 m . calclate the mmf to produce a flux of300/1000000 Wb.
problems on combination clipper
Some wire of cross-sectional area 1mm 2 has a resistance of 20Ω. Determine: a) The resistance of a wire of the same length and material if the cross-sectional area is 4 mm 2 .
Q. In a CD amplifier,given Rs =4k?, µ=50 and rd= 35k μ. Find the voltage gain Av. The voltage gain, A v = Vo / V i = µR s / (µ+1) R s + rd = 50*4* (103 )/ (50+1)*4*103
Q. A semiconductor diode with IS = 10µA and a 1-k resistor in series is forward-biased with a voltage source to yield a current of 30mA. Find the source voltage if the diode I-V e
Three equal impedances of D ohms resistance and C inductive reactance are connected in a DELTA configuration. The line voltage is A00 volts. Determine the line current, phase cur
Two stations, located on mountain tops 40 km apart, communicate with each other using two identical paraboloidal antennas with pencil beam- width of 1°, aperture ef?ciency of 0.8,
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