For the circuit shown, the Thevenin equivalent is

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
No Explanation available for this question

The directivity of an isotropic antenna is

1.  zero

2.  less than unity

3.  unity

4.  infinity

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4
Correct Answer :

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

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4
Correct Answer :

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

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4
Correct Answer :

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

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4
Correct Answer :

10 A


Explanation :
No Explanation available for this question

Poisson’s equation for an inhomogeneous medium is

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
No Explanation available for this question

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

1.  

2.  

3.  

4.  

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4
Correct Answer :


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.  

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4
Correct Answer :


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.  

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4
Correct Answer :


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.  

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4
Correct Answer :


Explanation :
No Explanation available for this question
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