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Q1. | In metals the thermal conductivity K and electrical conductivity σ are related as (K/σT) = L, L is known as |

A. | Lattice constant [Wrong Answer] |

B. | Lorentz number [Correct Answer] |

C. | Lanevin function [Wrong Answer] |

D. | Larmor number [Wrong Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ In 8085 microprocessor with memory mapped I/O which of the following is true?

I/O devices have 16 bit addresses

I/O devices are accessed during IN and OUT instructions

There can be a maximum of 256 input and 256 output devices

Logic operations can not be performed

⇒ An intrinsic silicon sample has 2 million free electrons. The number of holes in the sample is

2 million

almost zero

more than 2 million

less than 2 million

⇒ A dielectric should have poor heat conductivity.

TRUE

FALSE

⇒ In VHS format diameter of head drum is about

1 m

20 cm

6 cm

1 cm

⇒ A super heterodyne receiver has a IF of 465 kHz. It is tuned to a station broadcasting at 500 KHz and its oscillator is operating at 965 KHz, then the 1330 KHz frequency would be

adjacent channel frequency

image frequency

gyro frequency

maximum usable frequency

⇒ The resistance values of a PIN diode under positive bias and negative bias respectively are about

a few ohms and a kilo ohms

about 100 ohms and 1000 ohms

about 0.1 ohm and 100 ohms

about 1000 ohms and 10000 ohms

⇒ The units for transconductance are

ohms

amperes

volts

siemens

⇒ In a shunt-shunt negative feedback amplifier, as compared to the basic amplifier

both input and output impedances, decrease

input impedance decreases but output impedance increase

I/P impedance increases but O/P impedance decreases

both input and O/P impedance increases

⇒ Which one is correct option about ROC?

ROC does not contain any pole

ROC of finite duration sequence is entire plane expect

*z*= 0,

*z*= ∞

*a*and

*b*

only

*a*

⇒

Match the following:

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

A. | Darlington pair | 1. | uses pnp and npn transistors used as power amplifier |

B. | CB amplifier | 2. | Voltage gain nearly 1 and high input impedance |

C. | Cascade amplifier | 3. | low input impedance used for high frequency isolation |

A-1, B-2, C-3

A-2, B-3, C-1

A-2, B-1, C-3

A-3, B-1, C-2

⇒ The gate electrode in the FET corresponds to the

collector in a bipolar transistor

base in a bipolar transistor

emitter in a bipolar transistor

none of the above

⇒

**Assertion (A):** The gall tinsley potentiometer is a coordinate potentiometer and has two exactly similar potentiometers.

**Reason (R):** An ac potentiometer may measure the unknown voltage in polar form or rectangular coordinate form.

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

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

A is true R is false

A is false R is true

⇒ Each cell of static RAM contains

4 MOS transistors

4 MOS transistors and 1 capacitor

2 MOS transistors

4 MOS transistors and 2 capacitors

⇒ The arrangement in the given figure is a hybid

*T*. If 100 mW fed at port 1, the power reflected back at port

0

25 mW

50 mW

100 mW

⇒ In an

*n*type semiconductor the fermi level is 0.35 eV below the conduction band, the concentration of donor atoms is increased to three times. The new position of Fermi level will be

0.35 eV below conduction band

about 0.32 eV below conduction band

about 0.32 eV above conduction band

about 0.1 eV below conduction band

⇒ At night the ionosphere can be considered to be consisting of

D, E, F

_{1}and F

_{2}layers

D, E, F

_{1}layers

D, E, F

_{2}layers

E and F

_{2}layers

⇒ In a biased limiter the clipping level can be adjusted by adjusting the voltage of battery.

TRUE

FALSE

⇒ The number of roots of

*s*

^{3}+ 2

*s*

^{2}+ 7

*s*+ 3 = 0 in the left half of the s-plane is :

zero

one

two

three

⇒ Which one of the following compounds is widely used for making ferrites?

FeO

CuO

MgO

Fe

_{2}O

_{3}

⇒ The maximum power that can be transferred to the load is resistor R

_{L}from the voltage source in the figur

1 W

10 W

0.25 W

0.5 W

⇒ Frequency modulation consists in

varying the frequency and amplitude of the carrier in accordance with the instantaneous value of modulating signal

varying the amplitude of the carrier in accordance with the instantaneous value of the modulating voltage

varying the frequency of the carrier voltage in accordance with the instantaneous value of the modulating voltage

vary the frequency of the carrier voltage

⇒ Two sinusoidal waves 1 and 2 have peak values V

_{m1}and V

_{m2}. Wave 1 is leading wave 2 by ∠θ. Which of the following is correct?

*v*

_{1}= V

_{m1}sin θ and

*v*

_{2}= V

_{m2}cos θ

*v*

_{1}= V

_{m1}sin ω

*t*and

*v*

_{2}= V

_{m2}sin (ω

*t*- θ)

*v*

_{1}= V

_{m1}sin (ω

*t*+ θ/2) and

*v*

_{2}= V

_{m2}sin ω

*t*

none of the above

⇒ Which of the following integer expressions is incorrect in Pascal?

`L div M + P `

`A * * B`

`A div B - C `

`A mod B`

⇒ The energy of constant amplitude complex valued exponential sequence is ...

A

^{2}

∞

1

0

⇒ The natural frequency S

_{n}of the given circui

-1

1

42737

-2

⇒ If σ is standard deviation, variation is

σ - 1

σ

^{1.5}

σ

^{2}

σ

^{3}

⇒ A register is

a group is memories

a group of devices that store digital data

a chip used in computers

a pure silica piece used in digital systems

⇒ An antenna having an effective temperature of 27°K is fed into a microwave amplifier that has an effective noise temperature of 30 K. Calculate the available noise power per unit bandwidth

30 K

57 K

27 K

3K, K is Boltzmann constant

⇒ Find

*'X'*in the circuit bel

p(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15)

0

Σ(14)

1

⇒ Binary 1000 will be the result of which of the following?

Binary 1000 - 100

Binary 1011 - 1111

Binary 1111 - 111

Binary 11111 - 1111