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Q1. | Wiedemann-Franz law correlates |

A. | electrical and thermal conductivities [Correct Answer] |

B. | electron arrangement in shells [Wrong Answer] |

C. | temperature and photo electric emission [Wrong Answer] |

D. | all of the above [Wrong Answer] |

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**Also Read Similar Questions Below :**

⇒ X-rays cannot penetrate through a thick sheet of

wood

paper

lead

aluminium

⇒ Which of the following statements is false?

Push pull signals are equal and opposite in phase

Class AB operation cannot be used for a push pull audio power output phase

A push pull output transformer has a centre-tapped primary

All of the above

⇒ If the frequency is less than the damped frequency in a series- inverter

the distortion of output voltage waveform is low

the distortion of output voltage waveform is high

the distortion of output voltage may be high or low depending on the load impedance

none of the above

⇒ A lead compensator is basically a

high pass filter

low pass filter

band stop filter

none of the above

⇒ A TEM wave incident obliquely on a dielectric boundary with ε

_{r1}= 2 and ε

_{r2}= 1, the angle of incidence for total reflection is

30°

60°

45°

90°

⇒ Which of the following options is the closest in meaning to the world be

cyclic

indirect

confusing

crooked

⇒ The numerical value of directive gain may lie between

1 and + 1

0 and 1

0 and ∞

1 and ∞

⇒ The time constant of the network shown in figur

2 RC

5/3 RC

RC/2

None of these

⇒

Match the following:

List I (Characteristics) | List II (Device) | ||
---|---|---|---|

A. | Voltage controlled device | 1. | BJT |

B. | Current controlled device | 2. | UJT |

C. | Conductivity modulation device | 3. | FET |

D. | Negative conductance device | 4. | Impatt diode |

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

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

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

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

⇒ The maximum permissible distance between two samples of a 2 kHz signal is

1000 μ sec

500 μ sec

250 μ sec

2000 sec

⇒ A ramp input applied to a unity feedback system results in 5% steady state error. The type number and zero frequency gain of the system are respectively.

1 and 20

0 and 20

0 and 1/20

1 and 1/20

⇒ For a good public address system the sound intensity at the farthest point should be at least

20 dB over threshold of hearing

40 dB over threshold of hearing

80 dB over threshold of hearing

120 dB over threshold of hearing

⇒ The geostationary communication satellite APPLE is parked in the equatorial orbit at

102° E longitude over Sumatra

90° E longitude over Bangladesh

74° E longitude over India

67° E longitude over Pakistan

⇒ Force = Electric intensity x current.

TRUE

FALSE

⇒ A reactance function is always a quotient of

even to odd polynomials

odd to even polynomials

even to odd or odd to even polynomials

even to even polynomials

⇒ Given two numbers A and B in sign magnitude representation in an eight bit format A = 00011110 and B = 10011100 then A ⊕ B gives

10000010

11111

10011101

11100001

⇒ Which one of the following statements is wrong. The radar cross-section of a target?

depends on frequency

may be reduced by special coating of non-spherical target

depends on the aspect of target if it is non-spherical

is equal to actual cross-sectional area for small targets

⇒ Consider the following statements about data structures in Pascal

- Arrays and files are types of data structures.
- List structure is not a data structure in Pascal.
- Each element of a binary tree is called a node of the tree.

All

1, and 2 only

1 and 3 only

2 and 3 only

⇒ Examine the following truth table. The product of sum from this truth tabl

(X + Y) (X + Y)

(X + Y) (X + Y)

(X + Y) (X + Y)

(X + Y) (X + Y)

⇒ Two coils having equal resistance but different inductances are connected in series. The time constant of the series combination is

average of the time constants of individual coils

sum of the time constants of the individual coils

geometric mean of the time constants of individual coils

product of the time constants of the individual coils

⇒ 8085 has 6 sign flags.

TRUE

FALSE

⇒ Radiation resistance of an antenna is 54 Ω and loss resistance is 6 Ω. If antenna has power gain of 10, then directivity is:

9

11.11

data not sufficient

10

⇒ In AM the amplitude of carrier components ... while in FM it

remains constant, does not remain constant

does not remain constant ... remains constant

remains constant... also remains constant

does not remain constant, also does not remain constant

⇒ For a 4096 x 8 EPROM, the number of address lines is

14

12

10

8

⇒ In the expression 3 * * 2 ** 4 ** 2 in FORTRAN 77 which exponentiation is performed first

4 * * 2

2 * * 4

3 * * 2

all exponentiation are performed together

⇒ A uniform plane EM wave incident normally on a plane surface of a dielectric material is reflected with a VSWR of 3. What percentage of incident power that is reflected?

0.1

0.25

0.5

0.75

⇒ The complement of exclusive OR function is

AB + A B

AB + A B

A B + A

AB + A B

⇒ In a positive-edge-triggered JK flip-flop, a low J and a low K produce __________ state. A high __________ on the rising edge of the clock.

inactive, reset

active, reset

active, toggle

inactive, toggle

⇒ Assume that op-amp in figure is ideal. If input V

_{i}is triangular, the output V

_{0}wil

square wave

sine wave

triangular wave

parabolic wave

⇒ An open wire transmission line having a characteristic impedance of 600 ohms is terminated by a resistive load of 900 Ω. The standing wave ratio will be

1.5

2.5

3.5

4.5