A future space station in orbit about the earth is being powered by an electromagnetic beam from the earth. The beam has a cross-sectional area of 166 m2 and transmits an average power of 2.35 × 104 W. What are the rms values of the (a) electric and (b) magnetic fields?

Magnetic resonance imaging (MRI) is a medical technique for producing "pictures" of the interior of the body. The patient is placed within a strong magnetic field. One safety concern is what would happen to the positively and negatively charged particles in the body fluids if an equipment failure caused the magnetic field to be shut off suddenly. An induced emf could cause these particles to flow, producing an electric current within the body. Suppose the largest surface of the body through which flux passes has an area of 0.041 m² and a normal that is parallel to a magnetic field of 1.4 T. Determine the smallest time period during which the field can be allowed to vanish if the magnitude of the average induced emf is to be kept less than 0.013 V. B (out of screen) E

Problem 4: Displacement currents. A planar capacitor has two circular plates with equal radii R separated by a distance h. A dielectric cylinder of a smaller radius r 2 at.

An aircraft, of wing span 38.7 m, flies horizontally at a speed of 900 km/h. If the angle of dip of the magnetic field lines of the Earth is 64 degrees with respect to the Earth surface, calculate the emf induced between the tips of the wings. Take the value of the horizontal component of the magnetic field of the Earth B=2×10−5B=2×10−5 T. Please remember to select the correct units.

An automobile with a radio antenna 1.3 m long travels at 108.0 km/h in a location where the Earth's horizontal magnetic field is 3.0 ✕ 10−5 T. What is the maximum possible emf (in V) induced in the antenna due to this motion?

An electromagnetic wave with frequency 65.0 Hz travels in an insulating magnetic material that has dielectric constant 3.64 and relative permeability 5.18 at this frequency. The electric field has amplitude 7.20 × 10-³ V/m. Part A What is the speed of propagation of the wave? 17 ΑΣΦ V= Submit Request Answer Part B What is the wavelength of the wave? ΠΙ ΑΣΦ X = Submit Request Answer ? ? m/s m

Pulsars, or neutron stars, rotate at a fairly high speed, and they are surrounded by strong magnetic fields. The material in neutron stars is a good conductor, and hence a motional emf is induced between the center of the neutron star and the rim. Suppose that a neutron star of radius 12 km rotates at the rate of 35 rev/s and that the magnetic field has a strength of 1.00 x 108 T. What is the emf induced between the center of the star and a point on its equator?