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Assume you have a solenoid with a diameter of 4.0 cm and 2900 turns per meter, with an impedance of 0.70. An iron core consisting of a bundle of wires is placed in the core. The core has an effective susceptibility of 10 (rather than 1000, for this is based on experimental results). An aluminum ring of a mass of 23 grams (1.4 cm length and inside diameter of 5.7cm) and thickness of 0.33 cm is placed around the protruding core. It operates at 120 V(rms), 60 Hz household ac.
If all of the flux from the solenoid passes through the ring, calculate that flux as a function of time. Find the induced emf from the changing flux.
Calculate the resistance of the ring, using a value of 3.3 x 10^(-8) ohm/m for the resistivity of the aluminum, and from it, find the current in the ring.
A 300 ohm feedline is to beconnected to a 5-m long, 200 ohm line terminated in a 150 ohmantenna resistor. Both lines are lossless and use air as aninsulating material, and the operating frequency is 30MHz.
A sinusoidal message signal has a frequency of 10 Hz. The signal is the input to an FM modulator with an index of 8. Determine the bandwidth of the modulator output if a power ratio, Pr = 0.8 is required.
A switch-mode dc-dc converter is operating at a switching frequency of 20kHz, and Vd=150V. The average current being drawn by the dc motor is 8.0 A. In the equivalent circuit of the dc motor, Ea=100V, Ra=0.25 ohm, and La=4mH.
Write the switching expression for the burglar alarm that produces a logic 1 (rings a bell) when the safe is moved and the control switch is closed, or when the closet is o pen after banking hours, or when the closet is opened with the control swi..
The voltage across a 10-µF capacitor is given by v(t)=100sin(1000t). Find expression for the current, power, and stored energy. Sketch the waveforms to scale versus time.
Design a counter that will execute the numerical sequence 0, 2, 4, 6,repetitively. Unwanted states should be directed into wanted states that give the simplest logic functions. - Identify the number of required JK D-FLIP FLOP;
Using only resistors, capacitors and op-amps design a circuit meeting the following criteria: The circuit acts as a band pass filter. The 3dB points arer at 100 and 1000 Hz. The mid-range gain is -1 V/V and the mid-band input resistance is on the ..
What is the total power density and total available current density between wavelength of 280 and 1240 nm for the AM0 and AM1.5 spectra. Assume each photon generates on electron-hole pair. You will need AM1.5 and AM1.0 spectra.
constructed using standard value resistors a. Without making a single calculation, which resistive element will have the most voltage across it Which will have the least b. Which resistor will have the most impact on the total resistance.
a- The adjustability of the potentiometer can be used to obtain an adjustable output voltage b- Both power supplies must be used so that the adjustable voltage can have both positive and negative values
A police K-band radar is operating, with transmit power of 1000 Watts and antenna gain of 300 in linear units. The radar unit is designed to detect a target with a radar cross-section (RCS) of 6 sq. meters and its receiver can detect a signal
a 4A current source is in parallel with a 30 ohme resistance, a 15 ohme resistance, and an unknown resistance, Rx. The current through the unknown resistance is 1A. Determine the value of Rx.
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