physics
posted by rick .
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 is the peak emf of this generator?

physics 
drwls
Number of turns in the coil :
N = 5.5/(2 pi R) = 7.3
Coil area = A = pi R^2
B = 0.1 T
R = 0.12 m
Phi = magnetic flux = B A N cos theta
Induced EMF =d(Phi)/dt =  B A N sin theta * w
where w = d(theta) dt = 25 radians per second
Peak EMF = B A N w
Respond to this Question
Similar Questions

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
A generator uses a coil that has 280 turns and a 0.45T magnetic field. The frequency of this generator is 60.0 Hz, and its emf has an rms value of 120 V. Assuming that each turn of the coil is a square (an approximation), determine … 
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
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
A generator has a square coil consisting of 700 turns. The coil rotates at 78 rad/s in a 0.21T magnetic field. The peak output of the generator is 120.00 V. What is the length of one side of the coil? 
Physics
A generator has a square coil consisting of 700 turns. The coil rotates at 78 rad/s in a 0.21T magnetic field. The peak output of the generator is 120.00 V. What is the length of one side of the coil? 
Physics
A generator has a square coil consisting of 700 turns. The coil rotates at 78 rad/s in a 0.21T magnetic field. The peak output of the generator is 120.00 V. What is the length of one side of the coil? 
physics
The coil in a generator has 200 windings and a crosssectional area of 0.0100 m^2. If the coil turns at a constant rotational speed and the magnetic field in the generator is that of Earth (B = 0.500 × 10^4 T), how many 360 rotations … 
Physics HELP
1. A rectangular coil 0.065 m by 0.080 m is positioned so that its crosssectional area is perpendicular to the direction of a magnetic field. The coil has 66 turns and a total resistance of 7.6 Ω and the field decreases at a rate … 
Physics
1. A rectangular coil 0.065 m by 0.080 m is positioned so that its crosssectional area is perpendicular to the direction of a magnetic field. The coil has 66 turns and a total resistance of 7.6 Ω and the field decreases at a rate …