I need the answer as soon as possible B- give the Answers of the following questions:1- Derive the output equation of the d.c. generator.2- What is the late commutation, the cause of late commutation, the effect of late commutation and hto improve the late commutation.

ANSWER (1) -> A DC generator at supplies an electrical output with unidirectional voltage and…

Answered: B- give the Answers of the following…

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter22: Magnetism

Section: Chapter Questions

Problem 89PE: Unreasonable Results A surveyor 100 m from a long straight 200-kV DC power line suspects that its...

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(a) An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner's 2.00 T field with his fingers pointing in the direction of the field. Find the average emf induced in his wedding ling, given its diameter is 2.20 cm and assuming it takes 0.250 s to move it into the field. (b) Discuss whether this current would significantly change the temperature of the ring.
13. (a) Why transformer has current at no load? (b) How mechanical energy is converted to electrical energy in DC Generator?
(a) A DC power line for a light-rail system carries 1000 Aat an angle of 30.0o to the Earth’s 5.00 X 10-5-T field. What is the force on a 100-m section of this line? (b) Discuss practical concerns this presents, if any.
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#3. (a) Explain elaborately the factors affecting the magnitude of the induced emf in electricity generation. (b)Explain elaborately how can the motion of a charged particle be used to distinguish between an amagnetic field and an electric field?
A flat coil enclosing an area of 0.10 m2 is rotating at 60 rev/s,with its axis of rotation perpendicular to a 0.20-T magneticfield. (a) If there are 1 000 turns on the coil, what is the maximumvoltage induced in the coil? (b) When the maximuminduced voltage occurs, what is the orientation of the coil withrespect to the magnetic field?
(a) A dc power line for a light-rail system carries 1000 A at an angle of 30.0º to Earth’s 5.0 × 10−5 T field. What is the force on a 100-m section of this line? (b) Discuss practical concerns this presents, if any.
#3. (a) Explain briefly the factors affecting the magnitude of the induced emf in electricity generation. (b) How can the motion of a charged particle be used to distinguish between a magnetic field and an electric field
(a) An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner’s 2.00 T field with his fingers pointing in the direction of the field. Find the average emf induced in his wedding ring, given its diameter is 2.20 cm and assuming it takes 0.250 s to move itinto the field. (b) Discuss whether this current would significantly change the temperature of the ring.
(a) Briefly explain the construction and operation of a DC Shunt motor. (b) A dc shunt machine ( 10 kW, 250 V, 1200 rpm) had armature resistance of 0.25 Ω. Themachine is connected to 250 V dc supply, draws rated armature current ad rotates at 1200rpmi. Determine the generated voltage, the electromagnetic power developed and the torquedeveloped.ii. The mechanical load on the motor shaft is disconnected, and the motor draws 4 Aarmature current, determine the speed and rotational loss(Ignore armature reaction)
Why does the earth’s magnetic field is believed to originate? A. By a separation of north and south monopoles due to currents within the earth B. With electric currents that are somehow generated in the earth’s core C. From the process that are not understood D. From a giant iron and cobalt bar magnet inside the earth
An instrument based on induced emf has been used to measure projectile speeds up to 6 km/s. A small magnet is imbedded in the projectile as shown. The projectile passes through two coils separated by a distance d. As the projectile passes through each coil, a pulse of emf is induced in the coil. The time interval between pulses can be measured accurately with an oscilloscope, and thus the speed can be determined. (a) Sketch a graph of ΔV versus t for the arrangement shown. Consider a current that flows counterclockwise as viewed from the starting point of the projectile as positive. On your graph, indicate which pulse is from coil 1 and which is from coil 2. (b) If the pulse separation is 2.40 ms and d = 1.50 m, what is the projectile speed?

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B- give the Answers of the following questions: 1- Derive the output equation of the d.c. generator. 2- What is the late commutation, the cause of late commutation, the effect of late commutation and H to improve the late commutation.