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Suppose at t=0 we connect an uncharged .00001 F capacitor to a charging circuit consisting of a 2500 V voltage source in series with a 2 Mega ohm resistance. At t=40s, the capacitor is disconnected from the charging circuit and connected in parallel with a 5- Mega ohm resistor. Determine the voltage across the capacitor at t=40s and at t=100s.
A gas is confined to one side of a rigid insulated container divided by a partition. The other side is initially evacuated. The following is known for the initial state of the gas: P1 = 3 bar, T1 = 380 K and V1 = 0.025 m3.
If a computing system needs two 32Kbytes to store its program and 16Kbytes to store temporary data, will a 16-bit address bus sufficient
Assume that theelectron velocity is zero at the cathode, the E-field is directedfrom the anode to the cathode with a magnitude of E =24/0.4[kV/m], and there is no magnetic field.
Two concentric cirlces have radii of 5cm and 48mm. A particle traveling at 0.25 m/s smashes into the inner surface of the outer sphere. If the potential of the spherical capacitor is 50 V, what is the magnitude of charge picked up by the particle
Three equal point charges Q form an equilateral triangle of side length a. How much work is needed to move one charge to the position halfway between the other two
At the point you can check a point or two on the V-I curve and confirm that the plot is equivalent to the linear plot in Part 1. Describe a specific measured point on the curve and what it represents.
Draw the phasor diagrams associated with under-excited and over-excited synchronous motors and show the power factor of operation associated with each.
A sinusoidal voltage of peak value 169.9 is applied to a load Z=16-j9. a)What is the peak active power delivered to the load b) What is the value of the average active power delivered to the load
the voltage across and current through a certain device are given v(t)= 5cos(4πt), i(t)= 0.1cos(4πt) a) the instantanous power p(t) at t=0 andt=0.25s b) the average power Pav, define as the averga value p(t)
under insolation conditions 500 W/m^2 (direct sunlight), and 10% solar cell efficiency, calculate the area required for a photovoltaic array capable of running an electric vehicle driven by a single 40 hp motor for 3 hours at half power
A penstock is used to bring water from behind a dam into a turbine. the effective head is 20 m and the flow rate of water is 50m^3/s. Compute the power of the water exiting the penstock.
Sitting in front of you is a box; you cannot see iside the box. The box has a power cord that is plugged into a working wall socket. There is a wire coming out of the box; the end of the wire outside the box is exposed (not insulated) and is not c..
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