1) A large jetliner with a wingspan of 40 m flies horizontally and due north at
ID: 3097122 • Letter: 1
Question
1) A large jetliner with a wingspan of 40 m flies horizontally and due north at a speed of 300 m/s in a region where the magnetic field of earth is 60 uT directed 50 degrees below the horizontal. What is the magnitude of the induced emf between the ends of the wing?a) 250 mV
b)350 mV
c) 550 mV
d) 750 mV
2) A 500-turn circular coil with an area of 0.050 m^2 is mounted on a rotating frame, which turns at a rate of 20.0 rad/s in the presence of a 0.050-T uniform magnetic field that is perpendicular to the axis of rotation. What is the instantaneous emf in the coil at the moment that the normal is parallel to the field?
a) zero
b) 125 V
c) 216 V
d) 250 V
Explanation / Answer
1) emf= Blv = (60E-6)(sin50)(40)(300) = .552 V = 552 mV (choice C) 2) When the normal is parallel to the field, the flux is maximum and the instantaneous emf at that point is zero. E = -N?f/?t = 0 Choice A
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.