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Q1. | A virtual ground is a ground for |

A. | voltage [Wrong Answer] |

B. | current [Wrong Answer] |

C. | both voltage and current [Wrong Answer] |

D. | voltage but not for current [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ Algebraic expression for

*z*-transform of

*x*[

*n*] is X[

*z*]... What is the algebraic expression of

*z*-transform of

*e*

^{jω0n}

*x*[

*n*]?

X(Z - Z

_{0})

X(

*e*

^{-jW0z})

X(

*e*

^{jω0z})

X(Z)

^{jω0z}

⇒ The value of VSWR is taken as ∞ when the line is

short-circuited

open-circuited

terminated with full load

terminated with load equal to the characteristic impedance of the load

⇒ The selectivity of a radio receiver is

its ability to reject adjacent unwanted signals

its ability to amplify weak signals

the frequency at which it gives maximum amplification to signal.

its ability to suppress noise.

⇒ When slider of the potentiometer AB is in the position shown in figure, what resistance reading would be indicated by an ohmmeter connected between A an

zero

infinite

can't say

none of the above

⇒ Quartz crystal has

very small Q

small Q

very high Q

Q less than 1

⇒ In H-plane metal plate lens the travelling wave front is

totally retarded

retarded

accelerated

neither accelerated nor retarded

⇒

Match the following:

List I (Logic family) | List II (Characteristic) | ||
---|---|---|---|

A. | TTL | 1. | Maximum power consumption |

B. | ECL | 2. | Highest packing density |

C. | NMOS | 3. | Least power consumption |

D. | CMOS | 4. | Saturated Logic |

A-1, B-4, C-2, D-3

A-1, B-4, C-3, D-2

A-4, B-1, C-2, D-3

A-4, B-1, C-3, D-2

⇒ In Weston frequency meter, the magnetic axes of the two fixed coils are

parallel

perpendicular

inclined at 60°

inclined at 15°

⇒ In terms of

*z*parameters, the condition for the network to be passive is

*z*

_{11}=

*z*

_{22}

*z*

_{12}=

*z*

_{21}

*z*

_{11}= 0

*z*

_{22}= 0

⇒ In the 2's complement Adder-Subtractor

sign magnitude numbers represent negative numbers

the sign magnitude numbers have "1" as leading bit

the sign magnitude numbers have '0' as leading bit

2's complement represents positive numbers

⇒ Mark out the WRONG statem

Needs very high-speed burst modems

Faces no problems caused by intermodulation of carriers so that transponder can be used at its full power

Needs high-speed manipulation of bit streams

Is less flexible so that channels of widely different capacities cannot used and intermixed

⇒ A (0.75 -

*j*50) ohm load is connected to a coaxial transmission line of Z

_{0}= 75 ohms at a frequency of 10 GHz Which of the following will be the best method of matching?

Connecting an inductance at the end

Connecting a short circuited stub at the load

Connecting a capacitance at some distance from the load

Connecting a short circuited stub at some specified distance from the load

⇒ Audio cassettes used in household tape recorders have a width of

1"

1/2"

1/4"

1/8"

⇒ If Nyquist plot has a encirclement of (-1 +

*jo*) point, the system is stable if

there are no poles of G(

*s*) H(

*s*) in right-half plane

there is one pole of G(

*s*) H(

*s*) in right-half plane

there is no zeros of G(

*s*) H(

*s*) in right-half plane

none of the above

⇒ If load impedance Z

_{L}>> Z

_{0}, then

Z

_{0}= Z

_{L}(VSWR)

Z

_{L}= Z

_{0}(VSWR)

Z

_{L}= Z

_{0}(VSWR - 1)

Z

_{L}= Z

_{0}VSWR

⇒ Consider the following statements about a magic tee

- The collinear arms are isolated from each other.
- On of the collinear arms is isolated from E arm.
- On of the collinear arms is isolated from H arm.
- E and H arms are isolated from each other.

1 and 2 are correct

1 and 3 are correct

1 and 4 are correct

2 and 3 are correct

⇒ The manufacturing technique used to manufacture strip type transmission line is

photoetching technique

oxidation technique

cladding

epitaxial

⇒ End fire array is called a linear resonant dipole array.

TRUE

FALSE

⇒ In which mode of BJT operation are both junctions reverse biased?

Active

Saturation

Cut off

Reverse active

⇒ In FSK no synchronous carrier is needed at the receiver

TRUE

FALSE

depend on distance

none

⇒ In C the range of real constants expressed in exponential form is

-2.3

*e*37 to + 2.3

*e*37

-3.4

*e*38 to + 3.4

*e*38

-3.4

*e*37 to + 3.4

*e*37

-2.3

*e*38 to + 2.3

*e*38

⇒

**Assertion (A):** Maxwell bridge is for measuring inductance of medium magnitude.

**Reason (R):** In Maxwell's bridge the unknown inductance is measured by comparing it with a capacitance.

Both A and R are true and R is correct explanation of A

Both A and R are true but R is not correct explanation of A

A is true R is false

A is false R is true

⇒ Precisely 1 K byte means

1000 bits

1012 bits

1020bits

1024 bits

⇒ The main advantage of CMOS circuit is

high gain

high output impedance

low power consumption

high gain and high output impedance

⇒ If A = 10 +

*j*then log

_{e}A is

14.14 ∠45°

200 ∠45°

2.65 +

*j*45°

2.65 +

*j*0.785

⇒

Match the following:

List I (Instrument) | List II (Parameters) | ||
---|---|---|---|

A. | Moving coil galvanometer | 1. | High inertia, soft spring control |

B. | Ballistic galvanometer | 2. | No control, high damping |

C. | Vibration galvanometer | 3. | Soft spring control, critical damping |

D. | Moving coil flux meter | 4. | Low inertia, tuned spring control |

A-4, B-2, C-3, D-1

A-1, B-3, C-2, D-4

A-2, B-1, C-4, D-3

A-3, B-1, C-4, D-2

⇒ Audio-signal modulates a 125 MHz carrier, causing a frequency deviation of 5 kHz. The bandwidth of the narrowband FM signal is __________ kHz.

10

8

9

20

⇒ In a modified series inverter with two inductors and two capacitors, the load current

has 2 parallel paths

has only one parallel path

can have three parallel paths

has four parallel paths

⇒ X(

*t*) is a stationary process with the power spectral density S

_{x}(

*f*) > 0 for all

*f*. The process is passed through a system shown be

S

_{y}(

*f*) > 0 for all

*f*

S

_{y}(

*f*) = 0 for |f| > 1kHz

S

_{y}(

*f*) = 0 for

*f*=

*nf*

_{0},

*f*

_{0}= 2kHz,

*n*any integer

S

_{y}(

*f*) = 0 for

*f*= (2

*n*+ 1)

*f*

_{0}= 1 kHz,

*n*any integer

⇒ Volume control found on the front panel of television receivers

a ganged resistor

a variable resistor of logarithmic type

a variable resistor of linear type

a trimmer potentiometer