Code No: 13094
NR
Set No - 1
1. (a) Derive the general expression for explaining polarization.
in
II B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 ELECTRO MAGNETIC THEORY Common to Electronics And Control Engineering, Electronics And Instrumentation Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
[6M]
ld .
(b) What are the wave characteristics for a completely polarized wave?
[10M]
2. (a) A charge of 0.2 micro coulombs is acted upon by a force of 0.1Nw.in the presence of another charge of 0.45µc. Determine the distance between the two charges. Take the medium as air. [8M]
or
(b) What is the electric field intensity at a distance of 20cm from a charge of 0.2 micro coulombs in a vaccum. [8M]
3. (a) Determine the normal incidence reflection coefficients for sea-water and fresh water at a frequency of 1MHz. Use σ=4mho /m, εr =80 for sea-water; [8M]
uW
(b) A perpendicularly polarized wave propagates from region 1 (σ=0mho /m, εr =8.5,µr =1) to region 2,(free space), with an angle of incidence 150 . Given E0 i =1.0µv/m, find E0 r , E0 t , and VSWR. [8M] 4. (a) Write Maxwell’s equations in point form as well as in integral form. Then give the word statements of the these field equations. [8M] (b) A copper wire carries conduction current of 1 amp at 60 Hz. What is the displacement current in the wire? For copper assume ε = ε0 , µ = µ0 , σ = 5.8 ×107 mho/m. [8M]
nt
5. (a) Differentiate and explain conductors and dielectrics
[6M]
(b) The electric field E in air above a block of paraffin with relative dielectric constant=2.1 is at an angle of 450 with respect to the plane surface of the block. Find the angle between E and the surface in the paraffin [10M]
Aj
6. (a) Discuss the significance and applications of Poynting Theorem.
[8M]
(b) Explain the utility of Poynting vector. If the peak poynting vector in free space is 10w/m2 find the amplitudes of electric and magnetic fields. [8M]
7. Define the vector magnetic potential A and find A due to a straight long current conductor of length 2L meters , located on Z-axis. Hence find H at any point in yz plane. [16M] 8. (a) Distinguish between a “traveling wave” and a “standing wave”.
[5M]
(b) Obtain the equations for phase velocity and index of refraction.
[5M]
1
Code No: 13094
NR
Set No - 1
(c) Determine the propagation constant γ for a material having µr =1, εr = 8 and σ =0.25ps/m if the wave frequency is 1.6Mz. [6M]
Aj
nt
uW
or
ld .
in
?????
2
Code No: 13094
NR
Set No - 2
in
II B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 ELECTRO MAGNETIC THEORY Common to Electronics And Control Engineering, Electronics And Instrumentation Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
ld .
1. Define the vector magnetic potential A and find A due to a straight long current conductor of length 2L meters , located on Z-axis. Hence find H at any point in yz plane. [16M] 2. (a) Distinguish between a “traveling wave” and a “standing wave”.
[5M]
(b) Obtain the equations for phase velocity and index of refraction.
[5M]
or
(c) Determine the propagation constant γ for a material having µr =1, εr = 8 and σ =0.25ps/m if the wave frequency is 1.6Mz. [6M] 3. (a) A charge of 0.2 micro coulombs is acted upon by a force of 0.1Nw.in the presence of another charge of 0.45µc. Determine the distance between the two charges. Take the medium as air. [8M]
uW
(b) What is the electric field intensity at a distance of 20cm from a charge of 0.2 micro coulombs in a vaccum. [8M] 4. (a) Differentiate and explain conductors and dielectrics
[6M]
(b) The electric field E in air above a block of paraffin with relative dielectric constant=2.1 is at an angle of 450 with respect to the plane surface of the block. Find the angle between E and the surface in the paraffin [10M]
nt
5. (a) Write Maxwell’s equations in point form as well as in integral form. Then give the word statements of the these field equations. [8M] (b) A copper wire carries conduction current of 1 amp at 60 Hz. What is the displacement current in the wire? For copper assume ε = ε0 , µ = µ0 , σ = 5.8 ×107 mho/m. [8M]
Aj
6. (a) Determine the normal incidence reflection coefficients for sea-water and fresh water at a frequency of 1MHz. Use σ=4mho /m, εr =80 for sea-water; [8M] (b) A perpendicularly polarized wave propagates from region 1 (σ=0mho /m, εr =8.5,µr =1) to region 2,(free space), with an angle of incidence 150 . Given E0 i =1.0µv/m, find E0 r , E0 t , and VSWR. [8M]
7. (a) Derive the general expression for explaining polarization. (b) What are the wave characteristics for a completely polarized wave? 8. (a) Discuss the significance and applications of Poynting Theorem. 3
[10M] [6M] [8M]
Code No: 13094
NR
Set No - 2
(b) Explain the utility of Poynting vector. If the peak poynting vector in free space is 10w/m2 find the amplitudes of electric and magnetic fields. [8M]
Aj
nt
uW
or
ld .
in
?????
4
Code No: 13094
NR
Set No - 3
1. (a) Differentiate and explain conductors and dielectrics
in
II B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 ELECTRO MAGNETIC THEORY Common to Electronics And Control Engineering, Electronics And Instrumentation Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
[6M]
ld .
(b) The electric field E in air above a block of paraffin with relative dielectric constant=2.1 is at an angle of 450 with respect to the plane surface of the block. Find the angle between E and the surface in the paraffin [10M]
or
2. Define the vector magnetic potential A and find A due to a straight long current conductor of length 2L meters , located on Z-axis. Hence find H at any point in yz plane. [16M] 3. (a) Distinguish between a “traveling wave” and a “standing wave”.
[5M]
(b) Obtain the equations for phase velocity and index of refraction.
[5M]
uW
(c) Determine the propagation constant γ for a material having µr =1, εr = 8 and σ =0.25ps/m if the wave frequency is 1.6Mz. [6M] 4. (a) Derive the general expression for explaining polarization. (b) What are the wave characteristics for a completely polarized wave? 5. (a) Discuss the significance and applications of Poynting Theorem.
[10M] [6M] [8M]
(b) Explain the utility of Poynting vector. If the peak poynting vector in free space is 10w/m2 find the amplitudes of electric and magnetic fields. [8M]
nt
6. (a) A charge of 0.2 micro coulombs is acted upon by a force of 0.1Nw.in the presence of another charge of 0.45µc. Determine the distance between the two charges. Take the medium as air. [8M]
Aj
(b) What is the electric field intensity at a distance of 20cm from a charge of 0.2 micro coulombs in a vaccum. [8M]
7. (a) Determine the normal incidence reflection coefficients for sea-water and fresh water at a frequency of 1MHz. Use σ=4mho /m, εr =80 for sea-water; [8M] (b) A perpendicularly polarized wave propagates from region 1 (σ=0mho /m, εr =8.5,µr =1) to region 2,(free space), with an angle of incidence 150 . Given E0 i =1.0µv/m, find E0 r , E0 t , and VSWR. [8M]
8. (a) Write Maxwell’s equations in point form as well as in integral form. Then give the word statements of the these field equations. [8M]
5
Code No: 13094
NR
Set No - 3
(b) A copper wire carries conduction current of 1 amp at 60 Hz. What is the displacement current in the wire? For copper assume ε = ε0 , µ = µ0 , σ = 5.8 ×107 mho/m. [8M]
Aj
nt
uW
or
ld .
in
?????
6
Code No: 13094
NR
Set No - 4
in
II B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 ELECTRO MAGNETIC THEORY Common to Electronics And Control Engineering, Electronics And Instrumentation Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
ld .
1. (a) Determine the normal incidence reflection coefficients for sea-water and fresh water at a frequency of 1MHz. Use σ=4mho /m, εr =80 for sea-water; [8M]
(b) A perpendicularly polarized wave propagates from region 1 (σ=0mho /m, εr =8.5,µr =1) to region 2,(free space), with an angle of incidence 150 . Given E0 i =1.0µv/m, find E0 r , E0 t , and VSWR. [8M] 2. (a) Differentiate and explain conductors and dielectrics
[6M]
or
(b) The electric field E in air above a block of paraffin with relative dielectric constant=2.1 is at an angle of 450 with respect to the plane surface of the block. Find the angle between E and the surface in the paraffin [10M] 3. (a) Discuss the significance and applications of Poynting Theorem.
[8M]
uW
(b) Explain the utility of Poynting vector. If the peak poynting vector in free space is 10w/m2 find the amplitudes of electric and magnetic fields. [8M] 4. Define the vector magnetic potential A and find A due to a straight long current conductor of length 2L meters , located on Z-axis. Hence find H at any point in yz plane. [16M] 5. (a) Derive the general expression for explaining polarization.
[6M]
nt
(b) What are the wave characteristics for a completely polarized wave?
[10M]
6. (a) A charge of 0.2 micro coulombs is acted upon by a force of 0.1Nw.in the presence of another charge of 0.45µc. Determine the distance between the two charges. Take the medium as air. [8M]
Aj
(b) What is the electric field intensity at a distance of 20cm from a charge of 0.2 micro coulombs in a vaccum. [8M]
7. (a) Distinguish between a “traveling wave” and a “standing wave”.
[5M]
(b) Obtain the equations for phase velocity and index of refraction.
[5M]
(c) Determine the propagation constant γ for a material having µr =1, εr = 8 and σ =0.25ps/m if the wave frequency is 1.6Mz. [6M]
8. (a) Write Maxwell’s equations in point form as well as in integral form. Then give the word statements of the these field equations. [8M]
7
Code No: 13094
NR
Set No - 4
(b) A copper wire carries conduction current of 1 amp at 60 Hz. What is the displacement current in the wire? For copper assume ε = ε0 , µ = µ0 , σ = 5.8 ×107 mho/m. [8M]
Aj
nt
uW
or
ld .
in
?????
8
