A source of electromagnetic waves radiates power uniformly in all directions at a single frequency. At a distance of 3.50 km from the source, a detector measures the intensity of the wave to be 28.0 µW/m², a) What is the peak value of the magnetic field at the detector due to the wave? b) What is the average power radiated by the source? c) Now the detector is replaced with a perfectly absorbing sheet normal to the incident flux, with surface area 1.50 m'. What is the force on the sheet due to the wave?

Consider an electromagnetic wave with a maximum magnetic field strength of 7.5 × 10-4 T.Randomized VariablesB = 7.5 × 10-4 T What is the maximum electric field strength in the wave in kV/m?

A 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? T

The helium-neon lasers most commonly used in student physics laboratories have average power outputs of 0.250 mW. (a) If such a laser beam is projected onto a circular spot 1.30 mm in diameter, what is its intensity? 1.88e2 W/m2 (b) Find the peak electric field strength. 1.255e-6 What is the relationship between intensity and electric field strength? V/m (c) Find the peak magnetic field strength. 3.765e-6 What is the relationship between electric field strength and magnetic field strength in an electromagnetic wave? T

A parallel-plate, air-filled capacitor is being charged. The circular plates have radius 4.00 cm, and at aparticularinstant the conduction current in the wires is 0.520 A. What is the induced magneticfield between the plates at a distance of 2.00 cm from the axis?

Suppose you have an electric field as a result of superposition of two waves given by Ē(z, t) = Eo cos(kz - wt) + Eo cos(kz + wt)â. a. Simplify Ē(z, t) as one term and find its associated magnetic field b. Find the instantaneous and time-averaged energy density.

5) A circular-plate capacitor with radius 10.0 cm and plate separation 4.00 mm is being charged with a 0.100 A current. Calculate the a) the time rate of change of electric flux between the plates and b) the displacement current. c) the magnetic field between the plates, 5.00 cm from the center. 6) An electromagnetic wave in vacuum has an electric field amplitude of 100 V/m and frequency of 60 kHz. Calculate the a) amplitude, b) frequency of the corresponding magnetic field.

The helium-neon lasers most commonly used in student physics laboratories have average power outputs of 0.250 mW. (a) If such a laser beam is projected onto a circular spot 3.64 mm in diameter, what is its intensity?                W/m2 (b) Find the peak electric field strength.                 V/m (c) Find the peak magnetic field strength.                  T

An electromagnetic wave is traveling out of the page (normal to page) towards you with itselectric field osscilating along the horizontal. If the peak electric field in an electromagnetic waveis 754 µV/m, what is the peak magnetic field for the same wave and the direction of the magneticfield?

A plane electromagnetic wave is traveling in a vacuum. The magnetic field is directed along the z-axis and given by: B, = 3.0µT sin ((1.0 × 107 )x - (3.0 × 1015 )t ) a) Determine the wavelength , of the wave. b) What is the frequency, f, of the wave in Hertz? c) Determine the maximum strength of the B-field. d) Determine the maximum strength of the E-field and it direction. e) Can you find a time and place when the B-field is zero? f) What is the strength of the E-field when the B-filed is zero?