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Electricity and Magnetism
For a plane electromagnetic waves propagating in a non conducting medium which one of the following statement is true ?
1)the wave velocity is more than that in free space
2) the wave velocity is less than that in free space
3)the electric energy density is more than the magnetic energy density
4) the magnetic energy density is zero
1)the wave velocity is more than that in free space
2) the wave velocity is less than that in free space
3)the electric energy density is more than the magnetic energy density
4) the magnetic energy density is zero
Electricity and Magnetism
How is a wave group formed ? Obtain an expression for the velocity of a wave group. What is the relation connecting the group and phase velocities ?
Electricity and Magnetism
A transverse wave is incident on a boundary separating two media of acoustic impdances Z1 and Z2.
(a) Write down the equations of incident, reflected and transmitted waves. .
(b) Write down the boundary conditions.
(c) Obtain expressions for reflection and
transmission coefficients
(a) Write down the equations of incident, reflected and transmitted waves. .
(b) Write down the boundary conditions.
(c) Obtain expressions for reflection and
transmission coefficients
Electricity and Magnetism
1. Three point charges are arranged along the x-axis. Charge q1 = +5.00µC is at the origin, and charge q2 = -8.00µC is at x = 0.400m. Charge q3 = -10.00µC. Where is q3 located if the net force on q1 is 9.00N in the -x-direction(negative x direction)?
2. An 18-gauge copper wire, with a diameter of 2mm carries a constant current of 1.86A to a 240-W lamp. The free-electron density in the wire is 6.5x10^28 per cubic meter and the resistivity is 1.72x10^-8 Ωm. Find:
a. the curremt density
b. the drift speed
c. the electric-field magnitude in the wire
d. the potential difference between two points in the wire 60m apart
e. the resistance of a of this wire.
2. An 18-gauge copper wire, with a diameter of 2mm carries a constant current of 1.86A to a 240-W lamp. The free-electron density in the wire is 6.5x10^28 per cubic meter and the resistivity is 1.72x10^-8 Ωm. Find:
a. the curremt density
b. the drift speed
c. the electric-field magnitude in the wire
d. the potential difference between two points in the wire 60m apart
e. the resistance of a of this wire.
Electricity and Magnetism
a metal strip 6.5cm long,0.88cm wide &0.76mm thick moves with constant velocity v through a magnetic field B=1.2mT perpendicular to the strip.A Potential difference of 3.9V is measured between points x & y across the strip.Calculate the speed V.
Electricity and Magnetism
a metal strip 6.5cm long,0.88cm wide &0.76mm thick moves with constant velocity v through a magnetic field B=1.2mT perpendicular to the strip.A Potential difference of 3.9V is measured between points x & y across the strip.Calculate the speed V.
Electricity and Magnetism
Under what conditions do the following
time-varying electric and magnetic fields
satisfy Maxwell's equations in vacuum with
no source charges or currents ?
E = k E0 sin (y - vt)
B = I B0 sin (y - vt)
where E0 and Bo are constants.
time-varying electric and magnetic fields
satisfy Maxwell's equations in vacuum with
no source charges or currents ?
E = k E0 sin (y - vt)
B = I B0 sin (y - vt)
where E0 and Bo are constants.
Electricity and Magnetism
A plane electromagnetic wave propagates from one dielectric to another at normal incidence. Calculate the ratio of the indices of refraction of the two dielectrics for which the reflection and transmission coefficients are both equal to 0.5.
Electricity and Magnetism
he pole faces of a cyclotron magnet are 100 cm in diameter and the magnetic field between the pole faces is 0.60 tesla. The cyclotron is used to accelerate protons. Calculate the kinetic energy, in eV, and the speed of the protons as they emerge from the cyclotron.
Electricity and Magnetism
Using Ampere's law, obtain the expression for the magnetic field clue to a solenoid.
