To solve this problem it is necessary to apply the concepts related to the magnetic flow of a coil and take into account the angles for each case.
It is also necessary to delve into part C, the concept of electromotive force (emf) which is defined as the variation of the magnetic flux as a function of time.
By definition the magnetic flux is determined as:
Where
N = Number of loops We will calculate the value for each of the spins
B = Magnetic Field
A = Cross-sectional Area
Angle between the perpendicular cross-sectional area and the magnetic field.
PART A) The magnetic flux through the coil after it is rotated is as follows:
PART B) For the second case the angle formed is perpendicular therefore:
PART C) The average induced emf of the coil is as follows:
Frequency, is the number of times in a cycle
The correct option is D.
The critical angle is defined as the angle of incidence, which provides an angle of refraction of 90 degree. At any angle of incidence greater than the critical angle, all the light will totally reflected, resulting in total internal reflection.Thus, the critical angle is equal to the refractive index.
True
Explanation: Since the cornea is a curved surface, it acts like a convex lens and begins to focus the light rays. The light then passes through the pupil and hits the lens of the eye. The lens, also convex, further focuses the light so that it will hit the retina at the back of the eyeball.
Understand future consequences, for tell the future, control urges, and delayed gratification