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Q1. | In E plane metal plate lens antenna |

A. | travelling wavefronts are retarded [Wrong Answer] |

B. | travelling wavefront are accelerated [Correct Answer] |

C. | travelling wavefront remains unaffected [Wrong Answer] |

D. | none of the above [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 :**

⇒ If the energy is supplied from a source, whose resistance is 1 ohm, to a load of 100 ohms the source will be

a voltage source

a current source

both of the above

none of the above

⇒ Which statement is false as regards holes

Holes exist in conductors as well as semiconductors

Holes constitute positive charges

Holes exist only in semiconductors

Holes and electrons recombine

⇒ During transmission over a communication channel, bit errors occur independently with probability P. If a block of

*n*bits is transmitted, the probability of at most one bit error is equal to

1 - (1 - P)

^{n}

P + (

*n*- 1) (1 - P)

*n*P (1 - P)

^{n - 1}

(1 - P)

^{n}+

*n*P (1 - P)

^{n - 1}

⇒ Which of the following theorems enables a number of voltage (or current) sources to be combined directly into a single voltage (or current) source?

Superposition theorem

Compensation theorem

Millman's theorem

Thevenin's theorem

⇒ In a homogeneous magnetic field H of a solenoid, the core carries a magnetic dipole moment M per unit volume equal to

μ

_{0}H

μ

_{r}H

(μ

_{r}- 1) H

μ

_{o}μ

_{r}H

⇒ The most effective anti jamming technique is

frequency hopping

spread-spectrum modulation

key leverage

once-only key

⇒ When an alternating current passes through an ohmic resistance the electrical power converted into heat is

apparent power

true power

reactive power

none of the above

⇒ Consider the differential amplifier shown in figure. (Assume β is very hi

1 MΩ

100 kΩ

15 kΩ

≈ 0

⇒ When a transistor is to be at a temperature above 25°C

smaller heat sink be provided

maximum power rating be derated

biasing circuit must be strengthened

earth connections must be connected through a resistor

⇒ 23.6

_{10}= __________

_{2}

11111.1001

10111.1001

111.101

10111.1

⇒ An ideal current source has

infinite source resistance

zero source resistance

large value of source resistance

finite value of source resistance

⇒ The most common method for biasing a JFET is

reverse bias

self bias

voltage divider bias

none of the above

⇒ RMS value is always higher than average value.

TRUE

FALSE

⇒ In a single-stage RC coupled common emitter amplifier, the phase shift at the lower 3 dB frequency is

zero

135°

180°

225°

⇒ Consider the CMOS circuit shown, where the gate voltage V

_{G}of the n-MOSEFT is increased from zero, while the gate voltage of the p-MOSFET is kept constant at 3 V. Assume that, for both transistor, the magnitude of the threshold voltage is 1 V and the product of the transconductor parameter and the (W/L) ratio, i.e. the quality μC

_{0x}(W/L), is 1mA. V

^{-2Both the MOSFET are in saturation regionBoth the MOSFET are in triode regionn-MOSFET is in triode and p-MOSFET is in saturation regionn-MOSFET is in saturation and p-MOSFET is in triode region}

⇒ In 8085 microprocessor based system running at 3 MHz clock frequency what should be the minimum pulse width of the INTR signal, so that it is recognized successfully?

0.33 μs

0.666 μs

5.8 μs

none of these

⇒ For the infix expression (A/B) * (C * F + (A - D) * E) the corresponding Post fix notation is

A / D * CF AD - F * +

AB / CF * AD - E * + *

AB / C * FAD - E * + *

None of the above

⇒ An SR flip flop can be built using

NOR gate only

NAND gate only

either NOR or NAND gates

neither NOR nor NAND gates

⇒ An ammeter has a resistance of 50 ohms and a shunt of 0.01 Ω. The deflection is θ. If the shunt resistance is increased to 0.02 Ω, the deflection will be.

θ

2θ

0.5θ

0.25θ

⇒ When two

`ALU 1C 74181`

are cascadedthe carry out of first stage is connected to carry in of second stage

the carry in of first stage connected to carry in of second stage

the carry in of first stage is connected to carry out of second stage

the carry out of first stage is connected to carry out of second stage

⇒ All magnetic materials exhibit the phenomenon of saturation.

TRUE

FALSE

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

TRUE

FALSE

⇒ The voltage

*e*

_{o}indicated in the figure has been measured by an ideal voltmeter. Which of the following can be calcula

Bias current of inverting input only

Bias current of inverting and non-inverting inputs only

Input offset current only

Both the bias currents and the I/P offset current

⇒ The trapezoidal pattern of figure is obtained when examining an AM wave by an oscilloscope. Modulation factor of the wave

0.33

0.5

2

1

⇒ In a 4-ary FSK, the frequencies are separated by

*f*. Then they are

_{s}in phase

in phase opposition

orthogonal

none of the above

⇒ If the energy gap of a semiconductor is 1.1 eV, then it would be

opaque to visible light

transparent to visible light

transparent to ultraviolet radiation

transparent to infrared radiation

⇒ Consider the following statements relating to synchros

- Rotor of control transformer is either disc shaped or umbrella shaped
- Rotor of transmitter has low magnetic reluctance
- Transmitter and control transformer pair act as error detector

1, 2, 3

1 and 2

2 and 3

1 and 3

⇒ Rotation of a geosynchronous satellite means its

drift from stationary position

wobbling

three-axis stabilization

three-dimensional stabilization

⇒ Typical values of current gains for CE, CB and CC amplifiers are

120, 120 and 1 respectively

120, 1 and 120 respectively

1, 120 and 120 respectively

1, 1 and 120 respectively

⇒ In a CE amplifier circuit

Q point must lie on both dc and ac load lines

Q point lies on dc load line

Q point lies on ac load line

Q point lies may or may not lie on both dc and ac load lines