# A circuit with a resistor, inductor and a capacitor in series is resonant of f0 Hz. If all the component values are now doubled, the new resonant frequency is

1.  2f0

2.  Still f0

3.  f0/4

4.  f0/2

4
Correct Answer :

f0/2

Explanation :
No Explanation available for this question

# Antenna recriprocity is put to use in

1.  radar systems

2.   television broadcast systems

3.  commercial radio  broadcast systems

4.  none of these

4
Correct Answer :

radar systems

Explanation :
No Explanation available for this question

# The combinational logic circuit shown in the given figure has an output Q which is

1.  A B C.

2.  A + B + C

3.  A ⊕ B ⊕ C

4.  A B ? C

4
Correct Answer :

A + B + C

Explanation :
No Explanation available for this question

# A synchro-transmitter receiver unit is a

1.  Two-phase device

2.  3-phase ac device

3.   Dc device

4.   Single-phase ac device

4
Correct Answer :

Single-phase ac device

Explanation :
No Explanation available for this question

# In the circuit in Fig. 1, it is desired to have a constant direct current I (t) through the ideal inductor L. The nature of the voltage source v (t) must be

1.  Constant value

2.   Linearly increasing voltage

3.  An ideal impulse

4.   Exponentially increasing voltage

4
Correct Answer :

An ideal impulse

Explanation :
No Explanation available for this question

# The output of the gated network shown in the figure is

1.

2.

3.  AB + CD +EF

4.  (A + B) (C + D) (E + F)

4
Correct Answer :

AB + CD +EF

Explanation :
No Explanation available for this question

# Directivity of an antenna is

1.  same as its directive gain

2.  directive gain expressed in decibels

3.  the maximum value of its directive gain

4.  none of the these

4
Correct Answer :

the maximum value of its directive gain

Explanation :
No Explanation available for this question

# The digital multiplexers basically a combination logic circuit to perform the operation

1.  AND – AND.

2.  OR – OR

3.  AND – OR

4.  OR – AND

4
Correct Answer :

AND – OR

Explanation :
No Explanation available for this question

# Viewed from the terminals AB, the following circuit shown in the figure can be reduced to an equivalent circuit of single voltage source in series with a single resistor with the following parameters

1.  5 volt source in series with 10 resistor

2.  1 volt source in series with 2.4? resistor

3.  15 volt source in series with 2.4? resistor

4.   1 volt source in series with 10? resistor

4
Correct Answer :

1 volt source in series with 2.4? resistor

Explanation :
No Explanation available for this question

# Directive gain of an antenna is defined as the ratio of

1.   average radiated power to the radiated power in a given direction

2.   radiation intensity in a given direction to that of the radiation intensity in the same direction due to a hypothetical isotropic radiator that radiates the same total power

3.  radiation intensity in a given direction due to a hypothetical isotropic radiator to the radiation intensity in the same direction due to the actual antenna

4.  none of these

4
Correct Answer :

radiation intensity in a given direction to that of the radiation intensity in the same direction due to a hypothetical isotropic radiator that radiates the same total power

Explanation :
No Explanation available for this question

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