please answer all 11 questions. short answer question. 19. Explain the differenc
ID: 1546214 • Letter: P
Question
please answer all 11 questions. short answer question.
Explanation / Answer
19) The Difference Between Electric Motors and Generators
1) Energy is converted from many forms to electrical energy to operate equipment Electric Motors & Generators
Electric Motors • The electric motor converts electrical energy into mechanical energy • The shaft of a motor is driven by the magnetic forces developed between the armature and field • Current has to be supplied to the armature winding. • Motors obey Fleming`s Left Hand Rule
Electric Motors Fleming`s Left Hand Rule The Left Hand Rule shows what happens when charged particles enter a magnetic field.
Generators • A generator converts mechanical energy into electrical energy. • A shaft attached to the rotor is driven by a mechanical force • Electric current is produced in the armature windings. • Generators obey Fleming’s Right Hand Rule
Generators The Right Hand Rule shows how a current-carrying wire generates a magnetic field. Fleming`s Right Hand Rule
Faraday’s Law • Any change in magnetic environment of a wire coil creates voltage • In an electric motor, electrical current and magnetic field exist and lead to creation of motion • In a generator, motion and magnetic field exist, leads to creation of electrical current.
21) A solenoid is a coil of insulated or enameled wire wound on a rod-shaped form made of solid iron, solid steel, or powdered iron. Devices of this kind can be used as electromagnets, as inductors in electronic circuits, and as miniature wireless receiving antennas.
In a solenoid, the core material is ferromagnetic, meaning that it concentrates magnetic lines of flux. This increases the inductance of the coil far beyond the inductance obtainable with an air-core coil of the same dimensions and the same number of turns.
22) The motion of an electric charge producing a magnetic field is an essential concept in understanding magnetism. The magnetic moment of an atom can be the result of the electron's spin, which is the electron orbital motion and a change in the orbital motion of the electrons caused by an applied magnetic field.
23) Yes, Ferromagnetic materials have domains.
24) In an electrical circuit, the condition that exists when the inductive reactance and the capacitive reactance are of equal magnitude, causing electricalenergy to oscillate between the magnetic field of the inductor and the electric field of the capacitor.
25) Self inductance or in the other words inductance of the coil is defined as the property of the coil due to which it opposes the change of current flowing through it. Inductance is attained by a coil due to the self-induced emf produced in the coil itself by changing the current flowing through it.
28) In a direct current (DC) circuit, voltage or current is simple to define, but in an alternating current (AC) circuit, the definition is more complicated, and can be done in several ways. Root-mean-square (rms) refersto the most common mathematical method of defining the effective voltage or current of an AC wave.
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