Physics
posted by Mike .
A rectangular coil of 70 turns, dimensions 0.100 m by 0.200 m and total resistance 10.0 ohms, rotates with angular speed 32.0 rad/s about the y axis in a region where a 1.00 T magnetic field is directed along the x axis. The rotation is initiated so that the plane of the coil is perpendicular to the direction of vector B at t = 0.
(a) Calculate the maximum induced emf in the coil.
_______V
(b) Calculate the maximum rate of change of magnetic flux through the coil.
_______Wb/s
(c) Calculate the induced emf at t = 0.0500 s.
_______V
(d) Calculate the torque exerted on the coil by the magnetic field at the instant when the emf is a maximum.
_______N·m

a. induced current i = emf/R
emf e = NawB coswt
= 70*0.1*0.2 * 32 *1 * cos 32
= 38 volts
b. rate of change of flux = emf = 38 volts
c. emf e= AdB/dt= 72*0.1*0.2 * 1/5
= 0.288 volts
d. torque T = NiABw coswt
Respond to this Question
Similar Questions

physics
The coil of a generator has a radius of 0.12 m. When this coil is unwound, the wire from which it is made has a length of 5.5 m. The magnetic field of the generator is 0.10 T, and the coil rotates at an angular speed of 25 rad/s. What … 
Physics
A coil of wire with 200 circular turns of radius of 3 cm is in a uniform magnetic field along the axis of the coil. the coil has R=40 ohms. At what rate, in Teslas per second, must the magnetic field be changing to induce a current … 
Physics
An electric generator contains a coil of 100 turns of wire, each turn forming a rectangular loop 50cm by 30cm. The coil is placed entirely in a uniform magnetic field with magnitude, B = 3.5T and direction initially perpendicular to … 
physics
Need help on which formulas I use to solve problems? 
physics
The coil of the ac generator rotates at a frequency of f =60.0 Hz and develops an emf of 120 V (rms). The coil has an area of A = 3.0 x 10 3 m 2 and consists of N = 500 turns. a. Find the magnitude of the magnetic field in which the … 
Physics
A flat circular coil with 192 turns, a radius of 2.35 x 102 m, and a resistance of 0.359 Ù is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field … 
Physics
The coil of a generator has a radius of 0.12 m. When this coil is unwound, the wire from which it is made has a length of 5.8 m. The magnetic field of the generator is 0.21 T, and the coil rotates at an angular speed of 26 rad/s. What … 
Physics :(( help please TT
A neutral solid conducting cylinder rotates about its axis with angular speed 1600 rad/s. In addition, there is an external magnetic field of induction B directed along the cylinder's axis. What must the magnitude of the magnetic field … 
SIMPLE physics!!!!!!
A neutral solid conducting cylinder rotates about its axis with angular speed 1600 rad/s. In addition, there is an external magnetic field of induction B directed along the cylinder's axis. What must the magnitude of the magnetic field … 
physics
A neutral solid conducting cylinder rotates about its axis with angular speed 1600 rad/s. In addition, there is an external magnetic field of induction B directed along the cylinder's axis. What must the magnitude of the magnetic field in …