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 120 m² and transmits an average power of 1.79 x 104 W. What are the rms values of the (a) electric and (b) magnetic fields? (a) Number i Units (b) Number i Units

1. A 27.4-meter-long spacecraft flies past a neutron star, and passes through the neutron star s extremely powerful magnetic field of strength 8.88 x 10^4 T. The spacecraft travels at a velocity of 5.67 km/s in a direction perpendicular to the magnetic field; the spacecraft s long axis is also perpendicular to the magnetic field. What is the induced emf (voltage) between the two ends of the spacecraft?     1.38E+09 V   1.38E+10 V   1.38E+07 V   1.38E+06 V

On a clear day at a certain location, a 100-V/m vertical electric field exists near the Earth's surface. At the same place, the Earth's magnetic field has a magnitude of 0.500 × 10-4 T. Compute the energy densities of the electric field

Considerable scientific work is currently under way to determine whether weak oscillating magnetic fields such as those found near outdoor electric power lines can affect human health. One study indicated that a magnetic field of magnitude 1.40 x 10-³ T, oscillating at 60 Hz, might stimulate red blood cells to become cancerous. If the diameter of a red blood cell is 7.6 μm, determine the maximum emf that can be generated around the perimeter of the cell. V

A pickup truck has a width of 79.9 in. If it is traveling north at 36 m/s through a magnetic field with vertical component of 37 µT, what magnitude emf is induced between the driver and passenger sides of the truck? mV Need Help? Read It

A low-frequency radio wave is oscillating at a rate of 60 MHz with a peak electric field of 120 N/C. Which of the following functions is the correct excpression for the magnetic field? а. 2л B (x,t) =40µTsin -(1.2x)(10'). b. B (x,t) =0.40µTsin 2л Ос. B (x,t) =4.0µTsin 2 1.2)(10), Od. В (х,1) %3D0.40диTsin| (1.0) е. B (x,t) =0.40µTsin (1.2)

An automobile with a radio antenna 1.0 m long travels at 100.0 km/h in a location where the Earth’s horizontal magnetic field is 5.5 × 10−5 T. What is the maximum possible emf induced in the antenna due to this motion?

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

A 24-turn circular coil of wire has diameter 1.09 m. It is placed with its axis along the direction of the Earth's magnetic field of 47.0 µT and then in 0.200 s is flipped 180°. An average emf of what magnitude is generated in the coil? x What is the change in the magnetic flux during this time interval? mV

The device shown in the figure allows you to measure the rate of blood flow in the vessels of the human body, since the blood contains electrically charged ions. Suppose that the blood vessel measures 2.0 mm in diameter, that the magnetic field is 0.080 T and that the fem measurement is 0.10 mV. Is this statement True or False? N S Voltímetro