An industrial laser is used to burm a hole through a piece of metal. The average intensity of the light is Sav = 1.27 x 10" W/m². What is the rms value of the electric field? For this same laser, what is the ms value of the magnetic field?
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- A 23.9-meter-long spacecraft flies past a neutron star, and passes through the neutron stars extremely powerful magnetic field of strength 4.08 x 10^4 T. The spacecraft travels at a velocity of 7.35 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? 7.17E+09 V 7.17E+06 V 7.17E+05 V 7.17E+08 VD Current Attempt in Progress 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 UnitsThe owl has good night vision because its eye can detect an average light intensity as small as 3.0 10-13 W/m2for light with wavelength of 550 nm. (a) What is the rms value of the electric field of light with this intensity? (b) What is the peak value of the magnetic field of light with this intensity?
- Problem 4. A magnetic field directed into the page changes with time according to B = 2.0t³ - 4.0ť² + 3.0, where B is in tesla and t is in seconds. The field has a circular cross section of radius R = 2.5 cm (see figure below). (a) When t= 1.00 s and r₁= 5.0 cm, what are the magnitude and the direction of the electric field at point P₁? (b)When t = 2.00 s and r2 = 2.0 cm, what are the magnitude and the direction of the electric field at point P₂? xxxxx xxxxx xxxx** ** xxx T97 xxx R x xxxxx ****** xxxxx Bin n P₁A 0.220–A current is charging a capacitor that has circular plates 10.1 cm in radius. The plate separation is 4.00 mm. (a) What is the time rate of increase of electric field between the plates? V/(m·s)(b) What is the magnetic field between the plates 5.00 cm from the center? TA 11.3-A current flows through the wire shown as gray in the figure below. What is the magnitude of the magnetic field due to a 0.46-mm segment of wire (shown as yellow) as measured at (a) point A and (b) point B?
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