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Q1. | The p mode of operation of magnetron signifies that |

A. | the phase difference between adjacent anode poles is p radians [Correct Answer] |

B. | the phase difference between adjacent anode poles is a multiple of p radians [Wrong Answer] |

C. | the total phase shift around the periphery is p radians [Wrong Answer] |

D. | none of the above [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss 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 :**

⇒ When a current source I is suddenly connected across a two terminal relaxed RC circuit at time

*t*= 0, the voltage across the current source is shown in figure. The RC circui

a series combination of R and C

a parallel combination of R and C

a series combination of R and parallel combination of R and C

a pure capacitor

⇒ Consider a parallel plate capacitor being charged. Identify the incorrect statements

Energy stored in the capacitor does not enter it through the connecting wires but through the space around the wires and plates uf capacitor

Rate at which energy flows into this volume is equal to the integration of the Poynting vector over the boundary of the volume between the plates.

The Poynting vector points everywhere radially outward of the volume between the plates

The Poynting vector points everywhere radially into the volume between the plates.

⇒ TM

_{01}mode in circular waveguide is analogous to

TM

_{10}mode in square waveguide

TM

_{11}mode in square waveguide

TM

_{20}mode in square waveguide

TM

_{02}mode in square waveguide

⇒ A coil resonates at 1 MHz with a resonating capacitance of 72 pF. At 500 pF, resonance is obtained with a resonating capacitor of 360 pF. The self capacitance of coil is

12 pF

24 pF

30 pF

72 pF

⇒ For the truth table of the given figure

A + B + C

A + BC

A

B

⇒ Number of cards read per minute by a card reader may be of the order of

20

1

10000

300

⇒

Match the following:

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

A. | Output of signal generator | 1. | Modulated |

B. | Error signal from a synchro | 2. | Digital |

C. | Output of a JK flip flop | 3. | Analog |

D. | Signal received by radar | 4. | Stoichastic |

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

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

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

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

⇒ 4 bit ripple counter and 4 bit synchronous counter are made using flip-flop having a propagation delay of 10 ns each. If the worst case delay in the ripple counter and the synchronous counter be R and S respectively, then

R = 10 ns, S = 40 ns

R = 40 ns, S = 10 ns

R = 10 ns, S = 30 ns

R = 30 ns, S = 10 ns

⇒ In which of the following devices can the operation be visualised in terms of a series feedback loops?

TWT

Reflex klystron

Klystron amplifier

Backward wave oscillator

⇒

**Assertion (A):** For a physically realisable driving point function, the degree of numerator and denominator should be equal.

**Reason (R):** The sum of positive real functions is real.

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

⇒ In CE amplifier circuit, voltage gain is directly proportional to

β

collector supply voltage

base resistance

none of the above

⇒ The electric field of an EM wave propagating in the

*z*direction given

linearly polarized in z direction

elliptically polarized

left hand circularly polarized

right hand circularly polarized

⇒ Which display device resembles vacuum tube?

LED

LCD

VF

None of these

⇒ Triatics are

small height antenna directly mounted on jeeps, ships, etc.

the towers or masts which are used as radiators

the towers or masts which are not used as radiators

supports for antenna conductors.

⇒ EEPROM is also known as

UVPROM

EAPROM

both UVPROM and EAPROM

none of the above

⇒ If

*v*(

*t*) = 0 for

*t*< 0 and

*e*

^{-at}for

*t*≥ 0 V(

*j*ω) = 1/(a +

*j*ω).

TRUE

FALSE

⇒ Power gain of antenna equals directive gain in VHF and UHF range if and only if efficiency of the antenna is

0.25

0.5

0.75

1

⇒ The two numbers represent in signed 2's complement form are P = 11101101 and Q = 111001110. If Q subtracted from P, the value obtained in signed 2's complement form is

100000111

111

11111001

111111001

⇒ If any term in the first column of a Routh array becomes zero, then

Routh criterion cannot be used to determine stability

Routh criterion can be used by substituting a small positive number for zero and completing the array

Routh criterion can be used by substituting a big positive number for zero and completing the array

Routh criterion can be used by substituting a small negative number for zero and completing the array

⇒ The antenna most commonly used for TV broadcasting in the UHF band is

turnstile antenna

dipole antenna

yagi antenna

rhombic antenna

⇒ In a Weston synchronoscope the deflecting torque is zero when

currents in fixed and moving coils are in phase

currents in fixed and moving coils are out of phase by 90°

currents in fixed and moving coils are out of phase by 60°

none of the above

⇒ The silicon sample with unit cross-sectional area shown below is in thermal equilibrium. The following information is given: T = 300 K, electronic charge = 1.6 x 10

^{-19}C, thermal voltage = 26mV and electron mobility = 1350 cm

^{2}

2.16 x 10

^{4}A/cm

^{2}

1.08 x 10

^{4}A/cm

^{2}

4.32 x 10

^{3}A/cm

^{2}

6.48 x 10

^{2}A/cm

^{2}

⇒ The concentration of minority carriers in a semiconductor depends mainly on

the extent of doping

temperature

the applied bias

none of the above

⇒ Lines of magnetic field attract each other.

TRUE

FALSE

⇒ The storage battery used in power stations and substations is generally

nickel cadmium battery

lead acid battery

zinc carbon battery

zinc carbon or lead acid battery

⇒ At very low temperatures, semiconducting materials behave as insulators.

TRUE

FALSE

⇒ A circuit which cannot demodulate SSB is

balanced modulator

product detector

BFO

phase discriminator

⇒ - 56 is not a valid real constant in Fortran.

TRUE

FALSE

⇒ In a Weston synchronoscope, the moving coil is connected across

bus bar

incoming alternator

lamp

fixed coils

⇒ Which of the following microphones has highest output impedance?

Carbon

Ribbon

Crystal

Condenser