# A material has conductivity of 10-2 mho/m and a relative permittivity of 4. The frequency at which the conduction current in the medium is equal to the displacement current is

1.  45 MHz

2.  90 MHz

3.  450 MHz

4.  900 MHz

4

45 MHz

Explanation :
No Explanation available for this question

# If  , then  over path shown in the Fig. is

1.  0

2.  2/√3

3.  1

4.  2√3

4

1

Explanation :
No Explanation available for this question

# The magnetic field at a distance from the centre of the wire is proportional to

1.   r for r a

2.  0 for r a

3.   r for r a

4.  0 for r a

4

r for r <a and 1/r for r>a

Explanation :
No Explanation available for this question

# A hole of radius b (b

1.   Uniform and depends only on d

2.   Uniform and depends only on b

3.  Uniform and depends only on b and d

4.  Non uniform

4

Uniform and depends only on d

Explanation :
No Explanation available for this question

# A system of three electric charges lying in a straight line is in equilibrium. Two of the charges are positive with magnitudes Q and 2Q., and are 50 cm apart. Determine the sign, magnetic and position of the third charge

1.  x=54.15cm from q and 4.15 cm from 2q

2.  x=50.15cm from q and 1.15 cm from 2q

3.  x=51.15cm from q and 3.15 cm from 2q

4.  x=44.15cm from q and 4115 cm from 2q

4

x=54.15cm from q and 4.15 cm from 2q

Explanation :
No Explanation available for this question

# If a plane electromagnetic wave satisfies the equation , the wave propagates in the

1.   x-direction

2.   z-direction

3.  y-direction

4.  x z plane at an angle of 450 between the x and z direction

4

z-direction

Explanation :
No Explanation available for this question

# The electric field of a uniform plane electromagnetic wave in free space along the possible x direction, is given by  . The frequency and polarization of the wave respectively are

1.  1.2 GHz and left circular

2.  4 Hz and left circular

3.  1.2 GHz and right circular

4.  4 Hz and right circular

4

1.2 GHz and left circular

Explanation :
No Explanation available for this question

# The electric field component of a uniform plane electromagnetic wave propagating in the Y-direction in a lossless medium will satisfy the equation

1.  (∂2Ey/∂y2)=με(∂2Ey/∂t2)

2.  (∂2Ey/∂x2)=με(∂2Ey/∂t2)

3.  (∂2Ex/∂y2)=με(∂2Ex/∂t2)

4.

4

Explanation :
No Explanation available for this question

# A uniform plane electromagnetic wave incident noemally on a plane surface of a directric material is reflected with a VSWR of 3. What is the percentaged of incident power that is reflected

1.  10%

2.  25%

3.  50%

4.  75%

4

25\%

Explanation :
No Explanation available for this question

# A plane wave propagating in air with  is incident on a perfectly conducting slab positioned at x≤0. The   field of the reflected wave is

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

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