Find the current in the coils when motor is first turned on

Assignment Help Physics
Reference no: EM13546462

A motor has coils with a resistance of27and operates from a voltage of242V. When the motor is operating at its maximum speed, the back emf is146V.

(a) Find the current in the coils when the motor is first turned on.

A

(b) Find the current in the coils when the motor has reached maximum speed.

A

(c) If the current in the motor were7.0A at some instant, what is the back emf at that time?

V

Reference no: EM13546462

Questions Cloud

Explain the current price of gold and unit conversions : The current price of gold (per troy ounce) and unit conversions can be found in links at the bottom of the density page.
Coil produces a maximum emf : A rectangular coil 21 cm by 40 cm has 105 turns. This coil produces a maximum emf of 65 V when it rotates with an angular speed of 171 rad/s in a magnetic field of strength B. Find the value of B. __________mT
Find the value of earth''s magnetic field at that location : A 475turn circular-loop coil17.0cm in diameter is initially aligned so that its axis is parallel to Earth's magnetic field. find the value of Earth's magnetic field at that location
Explain an optical fiber for something is made sio2 glass : An optical fiber for something is made SiO2 glass (density = 2.2 Mg/m^3). How many Si atoms and how many O atoms are present per millimeter of length of a fiber 10 µm in diameter
Find the current in the coils when motor is first turned on : A motor has coils with a resistance of27and operates from a voltage of242V. When the motor is operating at its maximum speed, the back emf is146V. Find the current in the coils when the motor is first turned on
Obtain the magnitude and direction of the induced current : A coil with 150 turns, a radius of 5.0cm , and a resistance of 12 Ohms surrounds a solenoid with 200 turns/cm and a radius of 4.3cm, Calculate the magnitude and direction of the induced current in the 150-turn coil
Explain the atmosphere is approximate 20% of oxygen : Each square meter of an actively growing forest fixes on a average each year 1 kg of carbon from the atmosphere into plant matter through photosynthesis. The atmosphere is approximate 20% of oxygen, 80% of nitrogen, and but contains 0.046% of carb..
Explain content is in equilibrium with the surrounding : Shells of mussels (clams) are mainly of calcium carbonate. Usually the shell is stable and its content is in equilibrium with the surrounding. Mussels need to built up or reduce their shell, however, for additional surrounding.
Determine the total impedance-phase angle and rms current : Determine the total impedance, phase angle, and rms current in an LRC circuit connected to a 9.0 kHz, 800 V (rms) source if L = 32.0 mH, R = 9.70 k, and C = 5000 pF? Impedance= 9.71 kilo ohms phase angle= ? degrees rms current = 82.3893 mA Can someon..

Reviews

Write a Review

Physics Questions & Answers

  Determine what was the initial angular speed of the fan

An electric fan is running on HIGH. After fan has been running for 1.0 minutes, the LOW button is pushed. What was the initial angular speed of the fan in rev/sec

  Find what maximum acceleration can the elevator have

Two blocks each of mass m = 3.70 kg are fastened to the top of an elevator, If the strings can withstand a maximum tension of 92.0 N, what maximum acceleration can the elevator have before the upper string breaks

  Find the magnitude of the torque exerted by magnetic field

A current of 12.0 mA is maintained in a single circular loop with a circumference of 3.70 m. find the magnitude of the torque exerted by the magnetic field on the loop

  How much times passes between the two events

Consider the following two events: a concert begins in Miami, Florida and 5 seconds later (according to a clock at rest on Earth) a different concert begins in NYC. How much times passes between the two events according to someone at rest on Earth

  Determine the mass of the planet

A small moon of a giant planet has an orbital period of 1.74 days and an orbital radius of 4.02 105 km. determine the mass of the planet

  What is the maximum acceleration of the eardrum

When responding to sound, the human eardrum vibrates about its equilibrium position. What is the maximum acceleration of the eardrum

  Describe the hookes law

An ideal spring of negligible mass is 11.00cm long when nothing is attached to it, If you wanted to store 10.0 J of potential energy in this spring, what would be its total length? Assume that it continues to obey Hooke's law

  Determine the spring constant in n/m

The mass then travels vertically and it takes 1.10 s for the mass to reach the top of its trajectory. Determine the spring constant, in N/m. (Use g=9.81 m/s2). Assume that the time required for the spring to reach its full extension is negligible.

  What is the diameter of your hole in her reference frame

A grl is strapped to a board that is moving so that gamma along the length of the board is 2.0. what is the diameter of your hole in her reference frame when she arrives

  Find out the magnitude and direction of rockets acceleration

Find out the magnitude and direction of the rockets acceleration. Give the direction as an angle above the horizonal.

  Determine the temperature of the gas after equilibrium

Assume 3.0 moles of a diatomic gas has an internal energy of 10 kJ. Determine the temperature of the gas after it has reached equilibrium.

  How high does the light ball rise after the two collisions

In a physics demonstration, two rubber balls are dropped down a tube towards the ground,with the lighter ball behind, How high does the light ball rise after the two collisions

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