An electromangnetic wave has a peak magnetic field of 0.0045 T. What is its peak electric field?
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An electromangnetic wave has a peak magnetic field of 0.0045 T. What is its peak electric field?
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- 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)1. A magnetic field has a magnitude of 1.20 x 10 T, and an electric field has a magnitude of 4.70 x 10° N/C. Both fields point in the same direction. A positive 2.5 µC charge moves at a speed of 3.00 x 10° m/s in a direction that is perpendicular to both fields. Determine the magnitude of the net force that acts on the charge. NAssuming moving uniformly in all directions, a source of radio waves uses 15kW to send 2MHz. What is the electric field from these waves be 20km from the source?
- Lasers can be constructed that produce an extremely high intensity electromagnetic wave for a brief time. These devices are called pulsed lasers and can be used to ignite nuclear fusion, for example. Consider a pulsed laser that produces an electromagnetic wave with a maximum electric field strength of 1.25×10^11 V/m for a duration of 1.00 ns. What energy does it deliver on a 1.00 mm^2 area? Give your answer in units of kilojoules.A surface of area 50 cm ^2 is placed perpendicular to a magnetic field of strength 0.85T. The magnetic flux passing through the circuit will be * 5 x10 ^-3weber 4.25x 10^-3 weber 2.25x 10^ +3 weber 6.25x 10^+3 weberA 35.6-meter-long spacecraft flies past a neutron star, and passes through the neutron star s extremely powerful magnetic field of strength 7.95 x 10^4 T. The spacecraft travels at a velocity of 2.43 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? 6.88E+08 V 6.88E+09 V 6.88E+06 V 6.88E+05 V
- 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 mPulsars, 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?You want to build a very strong electromagnetic for your home. You have 13 Ampere power supply, a lot of wire, and a 12.4 cm long solenoid. How many turns of that wire are you going to wind on that solenoid to make a 0.307 Tesla field? Assume an ideal solenoid and that your wire will not be damaged by your current.
- 99. A velocity selector consists of electric and magnetic w fields described by the expressions E Bi, with B = 15.0 mT. Find the value of E such that a 750-eV electron moving in the negative x direction is undeflected. = Ek and B = %3D %3D %3DAt a given instant of time the electric field in a beam of sunlight has a magnitude of 429 N>C.What is the magnitude of the magnetic field at this instant?