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If the earth is considered to be a metal sphere(radius˜6371[km]), how much charge Q must bedeposited on its surface in order for an arc to be established inthe air. If the earth's surface was charged to the value byremoving all the electrons from a volume of soil, how large wouldthis volume be? Assume that the electron density of soil isapproximately 7 x 1023[cm-3].
Suppose the z=0 plane carries a sheet current K=5. A/m x. Then a 1 m long rod exists above the current sheet and has velocity u. Find the Vemf when the rod is parallel with the x-axis, u= 2(m/s) y.
A balanced Y-connected load of 100 + j50 Ohm is connected to a balanced three-phase source. If the line current is 42 A and the source supplies 12kw, determine (a) the line voltage; (b) the phase voltage.
design the controller and estimator so that the closed-loop unit step response to a command input has a rise time tr
A 50 µF capacitor, when connected in series with a coil having 40 ohms resistance, resonates at 1000 Hz. Find inductance of the coil. Also obtain the circuit current if the applied voltage is 100 V.
The wavelength of one particular emission of a certain galaxy has been shifted from 572 to 483 nm due to the Doppler effect. What is the radial speed of the galaxy relative to Earth
Design and implement a sequence detector using a finite state machine that detects the sequence 1, 1, 0, 1, 0. Consider previous/oldest bits for the sequence detection.
An input signal of 10V at 0o is applied to a parallel RLC circuit with resistor R = 10 , inductive reactance XL = 20 , and a capacitive reactance XC = 10 . All three components are connected in parallel to the source.
Discuss why it is that for a discharging capacitor, the discharge current is in the direction opposite from the charging current. Explain why capacitive reactance is measured in ohms. Also, state two differences between capacitance and capacitive r..
Determine the battery voltage required to obtain a flux density of 1.2 T in the air gap. Use the magnetization curve.
A single-phase 240/120 V transformer has the following parameters: R1 = 1-ohm; R2= 0.5 -ohm; X1 =6 -ohm; X2 = 2 -ohm; R0 = 500 -ohm; X0 = 1.5k -ohm.A load of 10 -ohm at 0.8 power factor lagging is connected across the low-voltage terminals of the tra..
A device for heating a cup of water in a car connects to the car's battery, which has an emf EMF = 10.0 V and an internal resistance r_int = 0.08 \Omega. The heating element that is immersed in the cup of water is a resistive coil with resistance ..
Referring to the circuit with switches connected to doors: Consider 3 doors, Doors A, B, and C. Design a circuit that will illuminate an LED only if both Doors A and B are closed or if Door A is closed and Door C is open.
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