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Q1. | In the spectrum of a FM wave |

A. | the carrier frequency cannot disappear [Wrong Answer] |

B. | the carrier frequency disappears when the modulation index is large [Wrong Answer] |

C. | the amplitude of any sideband depends on the modulation index [Correct Answer] |

D. | the total number of sidebands depends on the modulation index [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss 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 :**

⇒ Which of the following circuits come under the class of combinational logic circuits?

- Full adder
- Full subtractor
- Half adder
- J-K flip-flop
- Counter

1 only

3 and 4

4 and 5

1, 2 and 3

⇒ The data of speed of train V and resistance to motion

6.7 + 0.0092 V

^{2}

3 + 0.001 V

^{2}

3.2 + 0.0012 V

^{2}

5.2 + 0.006 V

^{2 }

⇒ The circuit of figure is used to measure the value R

_{x}. Ammeter resistance R

_{a}= 0.1 Ω voltmeter resistance R

_{v}= 5000 Ω. It R

_{x1}and R

_{x2}, are the measured values of R

_{x}with switch in position 1 and 2, the mean of R

_{x1}, and R

_{x2},

9.98 Ω

10 Ω

10.04 Ω

10.1 Ω

⇒

**Assertion (A):** Different symbols are used for different gates

**Reason (R):** IEEE symbols are the same as traditional symbols for gates.

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

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

A is true, R is false

A is false, R is true

⇒ In the given figure, A = B = 1 and C = D = 0. Then

1

0

either 1 or 0

indeterminate

⇒

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

⇒

**Assertion (A):** In a common source amplifier with source terminal at ac ground the voltage gain is about *g*_{m} *r*_{d}

**Reason (R):** A common source amplifier is a source follower circuit

Both A and R are correct and R is correct explanation for A

Both A and R are correct but R is not correct explanation for A

A is correct R is wrong

A is wrong R is correct

⇒ A transmission line terminates in two branches, each of length λ/4, as shown. The branches are terminated by 50Ω loads. The lines are lossless and have the characteristics impedances shown. Determine the impedance Z

_{1}as seen by the so

200Ω

100Ω

50Ω

25Ω

⇒ The electric intensity for free space is given by

ε

_{0}

*d*

σ/ε

_{0}

σ.ε

_{0}

*d*/ε

_{0}

⇒ In 8085 microprocessor, how many I/O ports can be accessed by memory mapped method?

8

256

32 K

64 K

⇒

*N*-type silicon is obtained by doping silicon with

germanium

aluminium

boron

phosphorus

⇒ Binary 1111 when added to binary 11111, the result in binary is

111111

1111

1000

10000

⇒ India's first domestic geostationary satellite 1NSAT-IA was launched on 10th April 1982 from

USSR

USA

UK

UP

⇒ In a colour TV receiver the bandwidth of RF amplifier is

exactly equal to channel width

a little less than channel width

a little more than channel width

either (a) or (b)

⇒ The induced magnetic dipole moment has a direction opposite to the applied magnetic field.

TRUE

FALSE

⇒ Frequencies in the UHF range propagate by means of

space wave

surface waves

sky waves

ground waves

⇒ 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}

⇒ A second order system will have

all resistances

resistances and inductances

resistances, inductance and capacitances

either (b) or (c)

⇒ Choose the correct option

- Transit period is the time between two steady state
- Transient Response is the response due to internal energy stored in circuit
- Transit response is also called natural response
- Transit response arises due to presence of C and L in the circuit
- Transit is due to R, L, C in the circuit

4, 3, 2 , 1

5, 4, 3, 2

5, 4, 3, 1

5, 1, 4

⇒ The function (

*s*+ 2) (

*s*+ 4)/[(

*s*+ 1)(

*s*+ 3)]

is a reactance function

is an RC function

may be a reactance function or an RC function

may be RC function or an RL function

⇒ A 3 bit binary adder should use

3 full adders

2 full adders and 1 half adder

1 full adder and 2 half adders

3 half adders

⇒ A chopper

converts constant voltage dc into ac and then into variable voltage dc

converts constant voltage dc into variable voltage dc directly

converts ac of one frequency into ac of another frequency

converts ac to dc

⇒ Permalloy is

a variety of stainless steel

a polymer

a conon-ferrous alloy used in aircraft industry

a nickel an iron alloy having high permeability

⇒ Fermi level in intrinsic semiconductor is at the centre of forbidden energy band.

TRUE

FALSE

⇒ Consider the following expressions which indicate the step or impulse response of an initially relaxed system

- [5 - 4
*e*^{-2t}]*u*(*t*) - [
*e*^{-2t}+ 5]*u*(*t*) *d*(*t*) + 8*e*^{-2t}*u*(*t*)*d*(*t*) + 4*e*^{-2t}*u*(*t*)

1 and 3

1 and 4

2 and 4

2 and 3

⇒ In applications where __________ input resistance is needed, the JFET is preferred to the bipolar transistor.

zero

very low

low

high

⇒ A 2 μF capacitor is shunted by a 1 kΩ maintained at temperature 400 K. The rms noise voltage across the capacitor over the entire frequency band is:

6.25 x 10

^{-8}V

5.25 x 10

^{-6}V

6.25 x 10

^{-6}V

5.25 x 10

^{-8}V

⇒ In a single phase half wave ac regulator feeding a resistive load, the rms load current

is always positive

may be positive or negative

is always negative

can be even zero

⇒ In an R-L circuit excited by a battery of voltage E, the current and voltage across resistor are 1-

*e*

^{-t}and 2(1 -

*e*

^{-t}) respectively. If there were an initial current of 2 A in the inductance, the voltage across resistance would have been

1 -

*e*

^{-t}

2 - 2

*e*

^{-t}

2 + 2

*e*

^{-t}

4 - 4

*e*

^{-t}

⇒ The characteristic impedance of loss less transmission line is

L/R

L/C

1/LC

C/L