2 Figure 32-20 shows a parallel-plate ca-pacitor and the current in the connectingwires that is discharging the capacitor. Arethe directions of (a) electric field E and(b) displacement current i leftward orrightward between the plates? (c) Is themagnetic field at point P into or out of thepage?Figure 32-20Question 2.

Answered: Image /qna-images/answer/ce96faa8-180b-4ab6-8001-a691346152c8.jpg

Answered: 2 Figure 32-20 shows a parallel-plate…

University Physics Volume 2

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Chapter16: Electromagnetic Waves

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Problem 89AP: In a region of space, the electric field is pointed along the x-axis, but its magnitude changes as...

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In an apparatus such as the one in Figure 21.22. suppose the black disk is replaced by one with half the radius. Which of the following are different after the disk is replaced? (a) radiation pressure on the disk (b) radiation force on the disk (c) radiation momentum delivered to the disk in a given time interval Figure 21.22 An .apparatus for measuring the radiation pressure of light. In practice, the system is contained in a high vacuum.
Suppose the maximum safe intensity of microwaves for human exposure is taken to be 1.00 W/m2. (a) If a radar unit leaks 10.0 W of microwaves (other than those sent by its antenna) uniformly in all directions, how far away must you be to be exposed to an intensity considered to be safe? Assume that the power spreads uniformly over the area of a sphere with no complications from absorption or reflection. (b) What is the maximum electric field strength at the safe intensity? (Note that early radar units leaked more than modern ones do. This caused identi?able health problems, such as cataracts, for people who worked near them.)
(II) Calculate the displacement current between thesquare plates, 5.8 cm on a side, of a capacitor if the electricfield is changing at a rate of 1.6 x 106 V/ m.s ?
3- A current of 2 uA is discharged on a capacitor with a plate area of 100 cm² and a capacitance of 1x10^-7F at t=0, and find the displacement current intensity (uA) between the plates at t=0. A) 3 B) 4 C) 5 D) 2 E) 1
EXAMPLE 31-6. E and B from the Sun. Radiation from the Sun reaches the Earth (above the atmosphere) at a rate of about 1350 J/s•m^2 (= 1350 W/m^2). Assume that this is a single EM wave, and calculate the maximum values of E and B.
A parallel-plate capacitor with circular plates of radius 0.10 m is being discharged. A circular loop of radius 0.20 m is concentric with the capacitor and halfway between the plates. The displacement current through the loop is 2.0 A. At what rate is the electric field between the plates changing?
A 0.120- A current is charging a capacitor that has square plates 5.80 cm on each side. The plate separation is 4.00 mm A) Find the time rate of change of electric flux between the plates V*m/s B) Find the displacement current between the plates A
In a region of space, the electric field is pointed along the x-axis, but its magnitude changes as described by Ex = (10 N/C) sin (20x − 500t) Ey = Ez = 0 where t is in nanoseconds and x is in cm. Find the displacement current through a circle of radius 3 cm in the x = 0 plane at t = 0 .
RF Electromagnetics: . If an x-component of the E-field varies as a sine function, and y-field component varies as a cosine function; assuming that the Ex=0.7Ey, what is the polarization of the resultant wave whichpropagates in the positive z-direction. For frequency f, write the full expression for the electricfield of a plane wave propagating in vacuum.
In a region of space, the electric field is pointed along the x-axis, but its magnitude changes as described by Ex=(10N/C)sin(20x500t)Ey=Ez=0 where t is in nanoseconds and x is in cm. Find the displacement current through a circle of radius 3 cm in the x = 0 plane at I = 0.
A spherical interplanetary grain of dust of radius 0.2 m is at a distance r1 from the Sun. The gravitational force exerted by the Sun on the grain just balances the force due to radiation pressure from the Sun's light. (i) Assume the grain is moved to a distance 2r1 from the Sun and released. At this location, what is the net force exerted on the grain? (a) toward the Sun (b) away from the Sun (c) zero (d) impossible to determine without knowing the mass of the grain (ii) Now assume the grain is moved back to its original location at r1, compressed so that it crystallizes into a sphere with significantly higher density, and then released. In this situation, what is the net force exerted on the grain? Choose from the same possibilities as in part (i).
A patient in an MRI unit turns his head quickly to one side and experiences momentary dizziness and a strange taste in his mouth. Discuss the possible causes.

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