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a. Write at least one paragraph explaining why the power factor of the motor changes as the rotor mechanical speed changesin the induction motor?
b. Write at least one paragraph explaining how we evaluate when the machine is operating in motor mode or generator mode. Which method makes the most sense?
Murray Loop Test and Locating Faults, Q.1 (a) Using the Murray Loop test, determine the distance to an earth fault on one of the cores of a uniform three-core underground cable. Ra = 2 ohms, Rb = 1 ohm
Electrons are liberated with zero velocity from the negative plate of a parallel plate capacitor, to which is applied a magnetic flux density B parallel to the plates. Prove that these electrons will not reach the positive plate.
Explain why the short-circuit method for determining the Thevenin resistance of a circuit cannot be applied if the circuit does not contain any independent current or voltage sources.
How to identify the starting and ending leads of winding in a motor which is having 6 leads in the terminal box.
A three phase load draws 100kW at a poer factor of 0.7 laggaing from a 220V line to line. In parallel with this load is a three phase capacitor bank which draws 60kVAR. Find the total line current and the resultant power factor.
Build a C++ code for vehicle sensing device. Code is required to embed in the device so that then it must sense the location where the vehicle is currently present. The device must be able to track the location of the vehicle for its owner
encounter a sequence of birds while walking in the park. The birds can either be blue (B) or red (R). We let X be the random variable corresponding to the number of birds we encounter until seeing the first blue one.
A person shuffling across a dry carpet can be approximately modeled as a charged100-pF capacitance with one end grounded. If the person touches a grounded metallic object such as a water faucet.
A part hollow non conducting sphere has a uniform volume charge density of 200 nC/m2. Find the potential difference between the inner surface at r=2cm and outer surface at r=5cm
Estimate the propagation delays of implementations (1), (2) and (3) using typical propagation delay data in the timing specifications of the logical gates of CD4000 family. Take the average propagation delay for 1-0 and 0-1 output transitions.
How long will the cassette tape player operate at normal power? A walker's cassette tape player uses 4 AA batteries in series to provide 6V to the player circuit.
Find the electric potential at point (0,0,z) resulting from a surface charge density ps existing on the z=0 plane from p = a to p = b. Assume V = 0 at an infinite point distance from the origin.
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