A helicopter (see figure below) has blades of length 3.50 m, extending out from a central hub and rotating at 3.30 rev/s. If the vertical component of the Earth's magnetic field is 50.0 μT, what is the magnitude of emf induced between the blade tip and the center hub? mv Sascha Hahn/Shutterstock.com

Time left 1:15:1 A 40 turn circular coil (radius = 4.0 cm, total resistance = 0.20 0) is placed in a uniform magnetic field directed perpendicular to the plane of the coil. The magnitude of the magnetic field varies with time as given by B 95 sin(10 Tt) mT where t is measured in s. What is the magnitude of the induced current in the coil at 0.07 s? O a. 1.76 A O b. 3.05 A O c. 1.49 A O d. 2.42 A e. 0 A Next page Introduction to Phys102

a flat circular coil with 150 turns, a radius of 6.00 * 10^-2 m, and a resistance of 0.30 is exposed to an external magnetic feild that is directed perpendicular to the plane of the coil. the magnitude of the external magnetic feild is changing with time at a rate of 0.80 T/s.  a. find the magnitude of the induced current.  b. find the magnitude of the induced magnetic feild B(induced) at the center of the coil.

A circular region 19.0 m in radius is filled with an electric field perpendicular to the face of the circle. The magnitude of the field in the circle varies with radius and time as E(r,t) = Arcos(at) where A 1000. V/m2 and -5.00 x 10's. What is the maximum value of the magnetic field at the edge of the region? T

The magnitude of the magnetic flux through the surface of a circular plate is 2.50 10-5 T. m2 when it is placed in a region of uniform magnetic field that is oriented at 46.0° to the vertical. The radius of the plate is 8.50 cm. Determine the strength of the magnetic field.        mT?

A circular loop rotates at constant speed about an axle through the centerof the loop. Shown is an edge view and defines the angle Φ, which increases from 0° to 360° as the loop rotates.a. At what angle or angles is the magnetic flux a maximum?b. At what angle or angles is the magnetic flux a minimum?c. At what angle or angles is the magnetic flux changing most rapidly?

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The component of the external magnetic field along the central axis of a 78 turn circular coil of radius 32.0 cm decreases from 2.40 T to 0.100 T in 2.00 s. If the resistance of the coil is R=3.00 Ω, what is the magnitude of the induced current in the coil? magnitude:              A   What is the direction of the current if the axial component of the field points away from the viewer?

Pls help me with the following question and make sure it's 100% correct  One solenoid is centered inside another. The outer one has a length of   53.0 cmcm and contains 6650 coils, while the coaxial inner solenoid is 3.00 cmcm long and 0.140 cmcm in diameter and contains 15.0 coils. The current in the outer solenoid is changing at 36.0 A/sA/s . For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of The Tesla coil. Part A. What is the mutual inductance of these solenoids? Express your answer in microhenrys.   Part B. Find the emf induced in the inner solenoid. Express your answer in volts.