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Q1. | In a AM wave the carrier and one of the side bands is suppressed. If m = 0.5, the percentage saving in power is |

A. | 0.5 [Wrong Answer] |

B. | 0.833 [Wrong Answer] |

C. | 0.944 [Correct Answer] |

D. | 1 [Wrong Answer] |

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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 :**

⇒

Match the following:

List I | List II | ||
---|---|---|---|

A. | C | 1. | 7 eV |

B. | Si | 2. | 1.15 eV |

C. | Ge | 3. | 0.75 eV |

D. | Sn | 4. | 0.1 eV |

E. | Pb | 5. | 0 eV |

A-2, B-3, C-4, D-5, E-1

A-1, B-2, C-3, D-4, E-5

A-3, B-1, C-2, D-5, E-4

A-4, B-5, C-1, D-2, E-3

⇒ In a gate output is Low if and only if all inputs are High. The gate is

OR

AND

NOR

NAND

⇒ The voltage and current distributions on a grounded λ/4 dipole (Marconi antenna) are similar to those of a half wave dipole in space.

TRUE

FALSE

⇒ In a resistor the current is

*i*and the voltage is

*v*. The rate of dissipation of heat at any time

*t*is

*vi*

*vit*

*vt*

*vit*

^{2}

⇒ All inverters use forced commutation.

TRUE

FALSE

⇒

**Assertion (A):** In a full wave rectifier output the lowest ac component is at twice the input frequency

**Reason (R):** In a full wave rectifier, the output waveform consists of half sinusoids

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

⇒ Voice signal band limited to 3.4 KHz is sampled and pulse code modulated using 64 quantization levels. Ten such signals are time division multiplexed using one 5-bit synchronizing word every alternate frame. The minimum channel bandwidth required for transmission of the TDM signal is

100 KHz

200 KHz

50 KHz

150 KHz

⇒ The phase difference (

*j*ω -

*p*

_{1}) means

phasor drawn from

*p*

_{1}to

*j*ω

phasor drawn from origin to

*p*

_{1}

phasor directed from origin to

*j*ω point

phasor directed from

*j*ω to

*p*

_{1}

⇒ Which amplifier has a voltage gain of less than 1?

Common emitter

Common collector

Common base

Both CB and CC

⇒ Drift velocity of electrons is generally less than 1 mm/s.

TRUE

FALSE

⇒ For telegraphy the most commonly used modulation system is

FSK

two tone modulation

PCM

single tone modulation

⇒ Saturation of iron core causes distortion.

TRUE

FALSE

⇒ In the circuit, S was initially open. At time

*t*= 0, S is closed. When the current through the inductor is 6 A, the rate of change of current through the resistor is 6 A/s. The value of the inductor woul

1 H

2 H

3 H

4 H

⇒ The forbidden energy gap for germanium is

0.12 eV

0.32 eV

0.72 eV

0.92 eV

⇒ In a megger the controlling torque is provided by

spring

gravity

coil

eddy current

⇒ 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

⇒ The number of variables in a function is odd and the number of minterms with even number of 0's are same as the number of minterms with odd number at 1's, the expression formed can be represented in __________ as well as __________ form.

Ex - OR, NOR

Equivalence, Ex - OR

AND, Coincidence

OR, Ex - OR

⇒ In an RC series circuit excited by dc voltage E, the current at

*t*= 0 is

E/R

E/C

zero

infinity

⇒ In a transmission line terminated with a load equal to the characteristic impedance, the reflection coefficient is

0

1

-1

Infinity

⇒ What will be the maximum conversion time in 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000).

108 sec

63 μ sec

40 sec

80 μ sec

⇒ A single phase full wave regulator feeds R-L load. The best gating signal is

short duration pulses

long duration pulses

pulse train

either (a) or (b)

⇒ Which of the following microphones works on the piezoelectric effect?

Carbon

Condenser

Moving coil

Crystal

⇒ For a P-N diode, the number of minority carriers crossing the junction depends on

forward bias voltage

potential barrier

rate of thermal generation of electron hole pairs

none of the above

⇒ Initially the number decimal 8 is stored. If instruction

`RAL`

is executed twice, the final number stored will bedecimals 8

decimal 16

decimal 32

decimal 2

⇒ The input impedance of short-circuited line of length

*l*where λ/4 <

*l*< λ/2, is

resistive

inductive

capacitive

none of the above

⇒ Which of the following plot can be directly used to determine β?

V

_{CE}versus

*i*

_{C}for constant I

_{B}

V

_{BE}versus

*i*

_{B}for constant V

_{CE}

V

_{CB}versus

*i*

_{C}for constant I

_{B}

All of the above

⇒ A signal with ± 10 V ranged and 1 KHz band width is being digitized using a sample and hold circuit and a 10 bit quantizer. The minimum sampling rate is :

62831.9 V/sec

125663.8 V/sec

31415.95 V/sec

None

⇒ A time varying magnetic field produces

electric field only

magnetic field only

both magnetic and electric fields

none of the above

⇒ A network N is dual of network N if

both of them have same mesh equation

both of them have same node equation

mesh equation of one are the node equations of the other

KCL and KVL equations are the same

⇒ UHF range is

30 MHz to 300 MHz

300 MHz to 3000 MHz

3000 MHz to 30, 000 MHz

above 30, 000 MHz