Users Also Read

MCQ's Search Engine

Electrical Engineering

Mechanical Engineering

Civil Engineering

Automobile Engineering

Chemical Engineering

Computer Engineering

Electronics Engineering

Medical Science Engg

Q1. | In a radio detector |

A. | stabilization against signal strength variation is provided [Wrong Answer] |

B. | linearity is worse than in a phase discriminator [Correct Answer] |

C. | the circuit is the same as in discriminator except that diodes are reversed [Wrong Answer] |

D. | output is twice that obtainable from a similar phase discriminator [Wrong Answer] |

View Answer
Explanation:-
Answer : BDiscuss 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 :**

⇒ Calculate

*i*(

*t*) for

*t*≥ 0, assuming the switch has been in position A for a long time at

*t*= 0, the switch is moved to positio

1 +

*e*

^{-5 x 103t}

*e*

^{-5 x 103t}

1.11

*e*

^{-5 x 103t}

1.11 (1 -

*e*

^{-5 x 103t})

⇒ A 10 bit D/A converter gives a maximum output of 10.23 V. The resolution is

10 mV

20 mV

15 mV

25 mV

⇒ DeMorgan's second theorem is

A . A = 0

A = A

A + B = A . B

AB = A + B

⇒ Choose the correct statement

The reflection coefficient (r) of a transmission line is greater than 1

r varies from 0 to ∞

r is less than or equal to 1

r varies from - ∞ to + ∞

⇒ For a transistor if a

_{dc}= 0.98 and emitter current I

_{E}is 2 mA, then base current will be

10 μA

40 μA

80 μA

200 μA

⇒ Consider the following statements as regards pulse repetition frequency

- Pulse interval should be as large as possible so that a pulse returns before next pulse is transmitted
- Greater the number of pulses reflected from a target, greater is the probability of distinguishing it from the noise

1 only

2 only

both 1 and 2

neither 1 nor 2

⇒ To evaluate X = (A + B + 1.2) * (A + B - C) the sequence of operation is

+ + + - * =

* + + + - =

+ + - * + =

- + + + * =

⇒ The synthesis of minimum function was suggested by

O'Brune

R. Richards

Bott and Duffin

none of the above

⇒ The maximum percent overshoot with maximum value of first overshoot as 3.5 V and steady state value as 2.575 V is

0.3592

0.2643

0.5761

0.1524

⇒ A reactance function

has a pole at origin

has a zero at origin

may have a pole or zero at origin

has a pole or zero at origin and a pole or zero at infinity

⇒ For a series circuit of R and variable X

_{L}the admittance locus is

a semicircle in first quadrant

a semicircle in fourth quadrant

a straight line in first quadrant

a straight line in fourth quadrant

⇒ In an op-amp a common mode signal is applied to

inverting terminal

non-inverting terminal

both terminals

one or both the terminals

⇒ Three identical coils each having self inductance L are connected in series so that the fluxes of all the three are in the same direction. If mutual inductance between each pair of coils is M, the total inductance of the arrangement is

3 L + 9 M

1.5 L + 3 M

3 L + 3 M

3 L + 6 M

⇒ The Boolean expression B⊕E is a simplified version of expression ABE + BCDE+ BC D E + A B D E + B C D E + A B D E then which of the following choice is correct?

- don't care conditions doesn't exist
- don't care conditions exist
*d*( 16, 18, 20, 23, 27, 29) is the set of don't care conditions*d*( 16, 20, 22, 27, 29) is the set of don't care conditions

1 only

2 and 3 only

2 and 4 only

data insufficient

⇒ Silicon and germanium have diamond structure. The number of atoms in a volume equal to

*a*

^{3}where

*a*is the edge of elementary cube are

32

16

8

4

⇒ For measuring inductance with high

*Q*, we should use

Maxwell's bridge

Maxwell Wien bridge

Hay's bridge

Either (a) or (b)

⇒

- P(
*s*) =*s*^{4}+*s*^{3}+ 2*s*^{2}+ 4*s*+ 3 - Q(
*s*) =*s*^{4}+ 2*s*^{3}+*s*

*s*) and Q(

*s*) polynomials?

Both P(

*s*) and Q(

*s*) are Hurwitz

Both P(

*s*) and Q(

*s*) are non-Hurwitz

P(

*s*) is Hurwitz but Q(

*s*) is non-Hurwitz

P(

*s*) is non-Hurwitz but Q(

*s*) is Hurwitz

⇒ Human body cannot sustain electric current beyond

1 μA

10 μA

5 μA

35 μA

⇒ If each branch of a Delta circuit has impedance 3 Z then each branch of the equivalent Y circuit has impedance.

Z/3

3 Z

3/3 Z

Z/3

⇒ A parallel plate capacitor with air as dielectric has a capacitance C. If the dielectric has a dielectric constant ∈

_{r}and the remaining dimensions are the same, the capacitance will be

C/∈

_{r}

∈

_{r}C

∈

^{2}

_{r}C

∈

^{3}

_{r}C

⇒

**Assertion (A):** Operator has a value 1 ∠ - 90° or 1 ∠ 90°.

**Reason (R):** Operator '*a*' has a value 1 ∠ 120°.

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

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

A is true but R is false

A is false but R is true

⇒ Video signals are transmitted through

amplitude modulation

frequency modulation

either amplitude or frequency modulation

neither amplitude nor frequency modulation

⇒ An ideal power supply has

zero internal resistance

very high internal resistance

high output resistance

both (b) and (c)

⇒ The impulse response

*h*(

*t*) of a linear invariant continuous time system is given by h(

*t*) = exp (- 2

*t*)

*u*(

*t*), where

*u*(

*t*) denotes the unit step function. The output of this system to the sinusoidal input

*x*(

*t*) = 2cos(2

*t*) for all time

*t*, is

0

2

^{-0.25}cos (2

*t*- 0.125p)

2

^{-0.5}cos (2

*t*- 0.125p)

2

^{-0.5}cos (2

*t*- 0.25p)

⇒ In AM increased depth of modulation increases __________ and in FM with increased depth of modulation __________ increases.

total transmitted power, bandwidth

bandwidth, bandwidth

bandwidth, total transmitted power

total transmitted power, sideband power

⇒ For ideal performance, a filter should be terminated in characteristic impedance.

TRUE

FALSE

⇒

**Assertion (A):** An unbiased p-n junction develops a built-in potential at the junction with the *n*-side positive and the *p*-side negative.

**Reason (R):** The *p-n* junction behaves as a battery and supplies current to a resistance connected across its terminals.

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

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

A is true but R is false

A is false but R is true

⇒ If

*e*= 10 sin(10

^{8}

*t*+ 3 sin 10

^{4}

*t*) then the modulation index is

1

2

3

4

⇒ Depth of penetration does not depend on frequency.

TRUE

FALSE

⇒ The most suitable method for detecting a modulated signal

*g*(

*t*) = (3 to 6 cos 2p

*f*) cos 2p

_{m}t*f*is

_{c}tenvelope detector

synchronous detector

ratio detector

both a and b