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

Assignment Help Physics
Reference no: EM13488493

A motor has coils with a resistance of 28 and operates from a voltage of 235 V. When the motor is operating at its maximum speed, the back emf is 147 V.

(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 were 6.0 A at some instant, what is the back emf at that time?

V

Reference no: EM13488493

Questions Cloud

What is the power input to the compressor : Refrigerant 22 is used as the working fluid in an ideal vapor-compression refrigeration cycle. Saturated vapor enters the compresssor at -40°C at a flow rate of 1 kg/s. What is the power input to the compressor
Explain the nernst equation applies to both cell reactions : The Nernst Equation applies to both cell reactions and half-reactions. For the conditions specified, calculate the potential for the following half reactions at 25 degrees C.
How much heat is transferred during this process : A horizontal piston-cylinder assembly contains 0.25 kg of an ideal gas (M=28.97 kg/kmol) of constant heat capacity (Cp=1 kj/kg*k and Cv=0.72 kj/kg*k), How much heat is transferred during this process
Explain what is the o-n-o bond angle in no3- : what is the O-N-O bond angle in NO3- (a) less than 109.5degree (b) 109.5 degree (c) 120 degree (d) greater than 120 degree
Find the current in the coils when motor is first turned on : A motor has coils with a resistance of 28 and operates from a voltage of 235 V. When the motor is operating at its maximum speed, the back emf is 147 V. Find the current in the coils when the motor is first turned on
Explain the effect of adding base to an aqueous solution : What is the effect of adding base to an aqueous solution of ammonia. 1-PH of the solution will increase 2-the conc. of NH4 will decrease 3-the conc. of NH3 will increase
What is the slit width and slit seperation : The diffraction pattern of a uniformly illuminated double-slit aperture consists of bright fringes spaced 5.00 cm apart on a screen 2.00 m from the aperture. what is the slit width and slit seperation
Orbital hydridization is associated with tetrahedral charge : Which orbital hydridization is associated with a tetrahedral charge cloud arrangement (a) sp (b) sp2 (c)sp3 (d) noe of these
What is the apertures height and width : The central order for a diffraction pattern from a rectangular aperture is measured to be 15.0 mm high and 5.00 mm wide on a screen 1.00 m away. what is the aperture's height and width

Reviews

Write a Review

Physics Questions & Answers

  What is the mass of the rim

A bicycle rim has a diameter of 0.65 m and a moment of inertia, What is the mass of the rim

  Find the direction of the force at the support point

A diving board of length 3 is supported at a point 1 from the end, and a diver weighing 480 stands at the free end. The diving board is of uniform cross section and weighs 295.

  What is the gravitational potential energy of the plane

Suppose you do 457 J of work on 1.18 moles of ideal gas in a perfectly insulated container. By how much does the internal energy of this gas change.

  Calculate the electric field just inside the paint layer

A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 13.0 cm, giving it a charge of -17.0 microC. Find the electric field just inside the paint layer

  Determine by what factor does the rate of heat flow change

Two metal rods of equal length-one aluminum, the other stainless steel-are connected in parallel with a temperature of 16.0%u2218C at one end and 126%u2218C at the other end, by what factor does the rate of heat flow change

  What would be its final velocity

A fictional spaceship accelerates at a constant rate of 0.107 m/s2. What would be its final velocity

  Find the absolute pressure in the bulb

A meat baster consists of a squeeze bulb attached to a plastic tube. When the bulb is squeezed and released, find the absolute pressure PB in the bulb

  Calculate the value of the unknown resistance

A 5.0 ? resistor is connected in series with another resistor and a 5.0 V battery. The current in the circuit is 0.70 A. Calculate the value of the unknown resistance

  What is the amplitude of the motion at the point located

A horizontal string tied at both ends is vibrating in its fundamental mode. The traveling waves have speed v, frequency f, amplitude A, and wavelength l.

  What is the kinetic energy of the alpha particle

he potential difference between two parallel conducting plates in vacuum is 410 V. What is the kinetic energy of the alpha particle

  What is its rotational inertia

A neutron star is an extremely dense, rapidly spinning object that results from the collapse of a star at the end of its life. What is its rotational inertia

  Illustrate what is the speed of the arrow as it leaves bow

A 91 g arrow is fired from a bow whose string exerts an average force of 115 N on the arrow over a distance of 78 cm. Illustrate what is the speed of the arrow as it leaves the bow?

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