# For the circuit shown, the Thevenin equivalent is

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# The directivity of an isotropic antenna is

1.  zero

2.  less than unity

3.  unity

4.  infinity

4

unity

Explanation :
No Explanation available for this question

# Medium wave radio signals may be received at far off distance at night because

1.  Radio waves travel faster at night

2.  Ground wave attenuation is low at night

3.  The sky wave is stronger at night

4.  There is no fading at night

4

The sky wave is stronger at night

Explanation :
No Explanation available for this question

# For a short wave radio link between two stations via the ionosphere, the ratio of the maximum usable frequency to the critical frequency

1.  Is always less than 1.

2.   Is always greater than 1

3.  May be 1 depending on the distance between the two stations

4.  Does not depend on the distance between the two stations

4

Is always greater than 1

Explanation :
No Explanation available for this question

# In order to radiate 100w from a circular loop for circumference equal to 0.1λ, the current required will be

1.  10 A

2.  100 A

3.  200 A

4.  400 A

4

10 A

Explanation :
No Explanation available for this question

# Poisson’s equation for an inhomogeneous medium is

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# Kirchhoff’s current law for direct current is implicit in the expression

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# When a lossy capacitor with a dielectric of permittivity€ and conductivity operates at a frequency, the loss tangent for the capacitorois given by

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# In addition to the condition that Y (s) is real when ‘s’ is real, for admittance function Y(s) to be positive real, which of the following conditions are to be satisfied

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# Two electric dipoles aligned parallel to each other and having the same axis exert a force F on each other, when a distance d apart. I the dipoles are at distance 2 d apart, then the mutual force between them would be

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

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