Physics
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For an electromagnetic wave at a particular location, the electric field is represented as E = (100 i + 200 j - 50k) V/m, while the magnetic field is denoted as B = (5.2 i - 8.3 j - b k)T at the same instance. Determine the Poynting vector at this particular moment.
In a science laboratory, you have a thin, black plastic film with dimensions of 8.0 by 8.0 inches and a mass of 0.42 g. You use an advanced laser system capable of producing a precisely controlled, upward-facing beam. Determine the minimum intensity required to suspend the plastic film in mid-air horizontally.
Given an electromagnetic wave with an intensity of 2000 W/m2, determine its total energy density.
A newly established base 6.0 × 10 9 km from Earth has set up communication with Earth. The base's 50 W transmitter sends data to Earth. Assuming equal broadcast in all directions, estimate the intensity of the signal received on Earth from the newly established base.
Consider a cylindrical cable with a radius of 'a', carrying a constant current 'I' and having a resistance 'R.' This current generates a magnetic field of strength 'B' surrounding the cable and an electric field 'E' which is uniform everywhere. Determine the Poynting vector's strength and direction at the cable's surface.
A cylindrical wire of radius a, length b, and resistance R carries a current I. If the power per unit area carried by an electric and magnetic field at the surface of the wire is (I2R) / (2πab), what should be the flux of the Poynting vector over the surface of the wire?
A research facility is testing a highly sensitive electromagnetic wave detector capable of detecting signals with a minimum electric field amplitude of 500 μV/m. Determine the intensity of the weakest electromagnetic wave the detector can perceive.
A radar signal is being used for remote sensing. The signal has an intensity of 50 W/m2 at the source. Determine the amplitude of the magnetic field associated with this radar signal.