Calculate the speed for the double shunt-field resistance

Assignment Help Electrical Engineering
Reference no: EM13279129

A shunt motor rotating at 1500 rpm is fed by a 120V dc source. The line current is 51 A and the shunt-field resistance is 120 ohm. If the armature resistance is 0.1 ohm, calculate the speed if the shunt-field resistance is doubled at no load condition. Suppose the terminal voltage VT does not change.

Reference no: EM13279129

Questions Cloud

Determine at which frequency will hear the required station : A transmitter transmits an AM sinal with a carrier frequncy of 1530kHz. When an inexpensive radio receiver (which has a poor selectivity in its RF-stage bandpass filter) is tuned to 1530kHz, the signal is heard loud and clear.
Detetmine the minimum work required and the heat : Detetmine the minimum work required and the heat that must be removed to isothermally pump liquid benzene from 20 degre celcius and 10 bar to 500 bar in a continuous, steady process.
Idolatry-social injustice and religious ritualism : Idolatry, social injustice, and religious ritualism? Cite examples of the prophets speaking on each of these issues. Knowing what the prophets had to say about these issues, what practical applications can be drawn from these teachings for today?
Describe teachings of hebrew wisdom on diligence-lazoness : Describe the teachings of Hebrew wisdom on diligence and laziness. How does this correspond with the contrast between wisdom and folly?
Calculate the speed for the double shunt-field resistance : The line current is 51 A and the shunt-field resistance is 120 ohm. If the armature resistance is 0.1 ohm, calculate the speed if the shunt-field resistance is doubled at no load condition. Suppose the terminal voltage VT does not change.
Calculate the maximum va rating of the autotransformer : Suppose a standard single-phase transformer that has a rating of a 15 kVA, 600V/120V, 60 Hz is reconnected as an autotransformer to obtain 600 V primary to 720 V secondary voltage ratio.
Strategic planning and capital budgeting : You are in the role of a chief operating officer for a for-profit insurance company. A board of directors has requested that you prepare a summary of the issues involved in a potential reduction in U. S. medical insurance reimbursement of 40%...
Determine what is the inductance for a voltage drop : While an inductor is being energized the current flowing through it as a function of time is: i(t) = 56 (1 - e(-4600 · t) ) mA, for all times t > 0 and t is in seconds. What is the inductance, if a voltage drop of 1.188 V is measured across this indu..
Estimate the magnification of the microscope : A microscope uses an eyepiece with a focal length of 1.43 cm. What is the magnification of the microscope

Reviews

Write a Review

Electrical Engineering Questions & Answers

  Find the attenuation constant alpha and phase constant beta

Find the attenuation constant alpha, the phase constant beta, and the phase velocity u if the conductivity of the material sigma=(omega)(epsilon), the material parameters are Ur=1, epsilon r =2.5, and the wavelength in free space is lamda naught =..

  What kind of transistor has higher voltage gain

What kind of transistor has higher voltage gain, BJT or FET and why What kind of transistor has better noise response BJT or FET and why How about frequency response high frequency, FET or BJT Low frequency response, FET or BJT

  Find after how many days of operation penalty billing covers

An industrial assembly hall is continuously lighted by one hundred 40- W mercury vapor lamps supplied by a 120- V and 60- Hz source with a power factor of 0.65. Due to the low power factor, a 25 percent penalty is applied at billing.

  How much work is done on the electron by the electric field

An electron is released from rest at a distance of 0.350 m from a large insulating sheet of charge that has uniform surface charge density 4.90×10^-12 C/m . A) How much work is done on the electron by the electric field of the sheet as the electron..

  Design for the case of the maximum number of lights

The heavy-duty rechargeable battery you selected can provide a continuous 9A of current at 12 V for a 4-hour period of operation each night before being completely drained.

  What will be segment base that will map to physical address

If the segment base 002Bh with offset 0013h maps to physical address 002C3h in memory, what will be the segment base that will map to same physical address 002C3h using an offset of 0003h

  How arsenic atoms are fully ionized at room temp

A Silicon wafer has a uniform doping density of 8 xl018 atoms cm-3 of Arsenic and 2.5 x 1019 atoms cm-3 of Phosphorus. Assume that all Arsenic atoms are fully (100%) ionized at room temperature but the Phosphorus atoms are 80% ionized.

  Design a handheld hair dryer with the given specifications

Design a handheld hair dryer with the following specifications and realistic constraints: 1. It uses a 60 Hz, single-phase, 120 V r.m.s sinusoidal voltage source. 2. It has three settings low, medium, high.

  Digital communications -order the following modulation types

Digital Communications, Order the following modulation types in terms of spectral efficiency (best to worse) and explain

  At what mark on meter stick should mass be suspended

a meter stick of uniform mass distribution and a mass of 0.150-kg is arranged as follows; a fulcrum is placed under the stick at the 20-cm mark on the stick. A mass of 0.100-kg is suspended from the 90-cm mark.

  Develop a coherent demodulation for the modulated signal

Use a modulation index of 50 percent and a sampling rate of 160 kHz. In this project, develop a coherent demodulation for the modulated signal. Assume there is no channel error.

  Determine the maximum gain of the antenna

A single-turn resonant circular loop with a /8 radius is made of copper wire with a wire radius of 10^4 pi f/2 and conductivity of 5.7 × 10^7S/m. For a frequency of 100 MHz, determine, assuming uniform current

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd