If a light wave has an electric field strength of 437.3 V/m, what is the magnetic field strength in a vacuum? Express your answer in micro Tesla ( uT =*10^ ^ -6) and to 3 decimal places
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- Magnetic flux is measured in webers which can be expressed in units of V*s (V = volts). The magnetic flux was 14.993 V*s. What is the magnetic flux in kV*µs?A laser beam has an average intensity, S = 8,005.9 W/m2. What is the magnitude of the rms magnetic field, Brms in mT, component of the electromagnetic waves emitted by this laser? 1.0 mT = 10-6 T. Please round your answer to one decimal place. Equations: cB2 S= TIMS Ho H₂=47x10-¹Tm/ A c= 3.0x108 m/sA (7.4020x10^-1)-m radius cylindrical region contains a uniform electric field that is parallel to the axis and is increasing at the rate (3.24x10^12) V/mxs. What is the magnitude of the magnetic field at a point (2.0320x10^-1) m from the axis? Express your result with three significant figures.
- (a) Suppose a star is 6.42 ✕ 1018 m from Earth. Imagine a pulse of radio waves is emitted toward Earth from the surface of this star. How long (in years) would it take to reach Earth (b) The Sun is 1.50 ✕ 1011 m from Earth. How long (in minutes) does it take sunlight to reach Earth? (c) The Moon is 3.84 ✕ 108 m from Earth. How long (in s) does it take for a radio transmission to travel from Earth to the Moon and back?A rocket zooms past the earth at v= 2.0 x 10 m/s. Scientists on the rocket have created the electric and magnetic fields shown in the figure.(Figure 1) Assume that B = 0.60 T and E= 6.0x105 V/m. Figure B E 2.0 x 10 m/s 1 of 1 What is the electric field strength measured by an earthbound scientist? Express your answer using two significant figures. 5 ΑΣΦ E = Submit Part B X Incorrect; Try Again; One attempt remaining Check your signs. O Up -6.105 What is the direction of the electric field measured by an earthbound scientis Down Submit Part C O Left O Right O Into the page O Out of the page Previous Answers Request Answer B = 0.60 T Submit ? Request Answer What is the magnetic field strength measured by an earthbound scientist? Express your answer using two significant figures. Correct Previous Answers V/mA metal cube with sides of length a is moving at velocity v=voj across a uniform magnetic field B = Bok. The cube is oriented so that four of its edges are parallel to its direction of motion (i.e., the normal vector of two faces are parallel to the direction of motion). (Figure 1) Figure Во 1 of 1 VO ▼ Part A Find E, the electric field inside the cube. Express the electric field in terms of vo, Bo, and unit vectors (i, j, and/or k). Ē=-voBoi Submit Correct Now, instead of electrons, suppose that the free charges have positive charge q. Examples include "holes" in semiconductors and positive ions in liquids, each of which act as "conductors" for their free charges. Part B Previous Answers If one replaces the conducting cube with one that has positive charge carriers, in what direction does the induced electric field point? O`-i O +i O +j O-k Submit Provide Feedback Request Answer Next
- An electromagnetic wave has wavelength λ and frequency f. What is the frequency of an electro-magnetic wave whose wavelength is 2λ?Electric field vector E and magnetic field vector B have dot product of -6.00 and their cross product has a magnitude of +9.00. Ehat is the angle between these two vector?(a) Suppose a star is 7.61 ✕ 1018 m from Earth. Imagine a pulse of radio waves is emitted toward Earth from the surface of this star. How long (in years) would it take to reach Earth? years (b) The Sun is 1.50 ✕ 1011 m from Earth. How long (in minutes) does it take sunlight to reach Earth? minutes (c) The Moon is 3.84 ✕ 108 m from Earth. How long (in s) does it take for a radio transmission to travel from Earth to the Moon and back? s
- The AM radio band in a particular area has a frequency range of 554 kHz to 1620 kHz. How long is the wavelength of the radiation at the beginning of the range and how long is the wavelength of the radiation at the end of the range? Answer in units of m.The general equation for the electric and the magnetic field as per the electromagnetic theory is, | E| = Emax. cos (kx – ot) = Bmay cos ( kx – ot) The energy per unit volume in an electric field is, 1 Ug 2 The energy per unit volume in a magnetic field is, UM 2 Ho Also, the energy density and the total energy associated with the magnetic field and the 1 electric field are equal. The rate with the energy flows in an EM wave is S =÷(E×B). Ho In the positive x direction, a plane EM wave varies sinusoidally at 99 MHz and the peak value of the electric field is 2 mV/m and it is moving in the ±y direction. The average density in the radiation is, (a) 1.75 ×10-14 J/m³ (b) 1.5 J/m? (с) 30х10-13 J/m3 (d) 0.755×10-14 J/m³A metal cube with sides of length a is moving at velocity v=voj across a uniform magnetic field B = Bok. The cube is oriented so that four of its edges are parallel to its direction of motion (i.e., the normal vector of two faces are parallel to the direction of motion). (Figure 1) Figure Bo N 1 of 1 Vo Part A Find E, the electric field inside the cube. Express the electric field in terms of vo, Bo, and unit vectors (i, j, and/or k). E = Submit Part B V ΑΣΦ -î Request Answer Now, instead of electrons, suppose that the free charges have positive charge q. Examples include "holes" in semiconductors and positive ions in liquids, each of which act as "conductors" for their free charges. www. J? If one replaces the conducting cube with one that has positive charge carriers, in what direction does the induced electric field point? Submit Request Answer