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Electricity and Magnetism
A uniform plane wave of 100 kHz travelling in free space strikes a large block of a
material having 4 , 9 and 0 ε = ε0 µ = µ0 σ = normal to the surface. If the incident
magnetic field vector is given by
10 cos( ) ˆ tesla 6 B = ωt −βy z
−
r
write the complete expressions for the incident, reflected, and transmitted field
vectors.
material having 4 , 9 and 0 ε = ε0 µ = µ0 σ = normal to the surface. If the incident
magnetic field vector is given by
10 cos( ) ˆ tesla 6 B = ωt −βy z
−
r
write the complete expressions for the incident, reflected, and transmitted field
vectors.
Electricity and Magnetism
A long, straight wire of radius 5.0 mm carries a current of 20A. i) Calculate the
magnetic field at the surface of the wire, and ii) calculate the perpendicular distance,
from the axis of the wire, at which the magnitude of magnetic field will be half of
its value at the wire surface.
magnetic field at the surface of the wire, and ii) calculate the perpendicular distance,
from the axis of the wire, at which the magnitude of magnetic field will be half of
its value at the wire surface.
Electricity and Magnetism
Two long, straight, parallel wires A and B, separated by a distance of 30 cm, carry
currents IA = 10A and IB = 30A. The currents in both the wires flow in the same
direction. Calculate the net magnetic field at the midpoint of the line joining the two
wires and perpendicular to them.
currents IA = 10A and IB = 30A. The currents in both the wires flow in the same
direction. Calculate the net magnetic field at the midpoint of the line joining the two
wires and perpendicular to them.
Electricity and Magnetism
https://www.youtube.com/watch?v=CQrxLHkgxjM
Is this true what is being showed in above video link?
Is this true what is being showed in above video link?
Electricity and Magnetism
Two long, straight, parallel wires A and B, separated by a distance of 30 cm, carry currents IA = 10A and IB = 30A. The currents in both the wires flow in the same direction. Calculate the net magnetic field at the midpoint of the line joining the two wires and perpendicular to them
Electricity and Magnetism
A long, straight wire of radius 5.0 mm carries a current of 20A. i) Calculate the magnetic field at the surface of the wire, and ii) calculate the perpendicular distance, from the axis of the wire, at which the magnitude of magnetic field will be half of its value at the wire surface.
Electricity and Magnetism
Using Maxwell’s equations in free space, derive the wave equation for the electric field vector. Obtain the conditions under which the following time varying electric and magnetic fields satisfy Maxwell’s equations in vacuum with no source charges or currents:
) (sinˆ 0 vt yE −= kE
) (sinˆ 0 vt yB −= iB
where E0 and B0 are constant.
) (sinˆ 0 vt yE −= kE
) (sinˆ 0 vt yB −= iB
where E0 and B0 are constant.
Electricity and Magnetism
1. A positively charged sphere is brought near to two neutral spheres. Indicate the charge distribution on both of the neutral spheres either in words or by drawing plus and minus signs within the neutral spheres.
2. A conducting sphere has a charge of +10 coulombs. A similar but neutral sphere is brought in contact with it.
a. What is the charge on each of the spheres once they touch?
b. Which particles are transferred and which way do they flow?
3. A conducting sphere A has a positive charge. Two neutral conducting spheres, B and C, are brought close to A. as shown. (Note that B and C are touching, unlike the case in question #1.)
ABC
In the end,
_____
a. B becomes positive and C negative
b. B becomes negative and C positive
c. both B and C remain neutral
2. A conducting sphere has a charge of +10 coulombs. A similar but neutral sphere is brought in contact with it.
a. What is the charge on each of the spheres once they touch?
b. Which particles are transferred and which way do they flow?
3. A conducting sphere A has a positive charge. Two neutral conducting spheres, B and C, are brought close to A. as shown. (Note that B and C are touching, unlike the case in question #1.)
ABC
In the end,
_____
a. B becomes positive and C negative
b. B becomes negative and C positive
c. both B and C remain neutral
Electricity and Magnetism
A satellite explodes in the outer space and can be seen quickly from a spaceship in lunar orbit but the explosion cannot be heard, because ____.
A. There is no air on the moon
B. Light travels faster than sound
C. The light is reflected around the moon
D. Sound waves don't travel in straight lines
A. There is no air on the moon
B. Light travels faster than sound
C. The light is reflected around the moon
D. Sound waves don't travel in straight lines
Electricity and Magnetism
One mole of a gas occupies 22.4 liters at 0°C and 760 mm Hg. Calculate the pressure needed to compress 2.00 moles of oxygen into a 3.00-liter container maintained at 25°C.
