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Q1. | Ferrites are |

A. | ferromagnetic materials [Correct Answer] |

B. | ferrimagnetic materials [Wrong Answer] |

C. | ferroelectric materials [Wrong Answer] |

D. | ferri-ferromagnetic materials [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 :**

⇒ A fascimile reproduction has a specification of 200 lines per frame, progressive scanning and 5 frames per second. The time to scan one line is

5 ms

2.5 ms

1 ms

0.1 ms

⇒ In band III of TV, distant reception (beyond line of sight range) is possible due to

tropospheric bending by refraction

reflection of waves

ionospheric scattering

none of the above

⇒ In integral cycle control the period of on-off control should be more than mechanical time constant of load.

TRUE

FALSE

⇒ Which one of the following is not necessarily an advantage of the phase cancellation method of obtaining SSB over the filter method?

It is possible to generate SSB at any frequency

SSB with lower audio frequencies present can be generated

Switching from one sideband to other is simpler

There are more balanced modulators; therefore the carrier is suppressed better

⇒ The current through a PN Junction diode with

*v*volts applied to the P region to the N region, where (I

_{0}is the reverse saturation current to the diode,

*m*the ideality factor,

*k*the Boltzmann constant, T the absolute temperature and

*q*the magnitude of charge on an electron) is

I

_{0}(

*e*

^{-qv/mkT}- 1)

I

_{0}

*e*

^{-qv/mkT}

I

_{0}(1 -

*e*

^{qv/mkT})

I

_{0}(

*e*

^{qv/mkT}- 1)

⇒ 'Rotate instruction' in microprocessor belongs to

data transfer group

arithmetic group

logic group

branch group

⇒ In force current analogy, displacement

*x*is analogous to

charge

magnetic flux linkage

electrostatic energy

voltage

⇒ In Weston synchronoscope the fixed coils are connected across

bus bars

incoming alternator

lamp

either (a) or (b)

⇒ Computer communication networks have

star configuration

tree configuration

loop/mesh configuration

All of the above

⇒ Find

*V*

_{o}(

*t*) for the following circ

0 V

5 V

3 V

2 V

⇒ For the system of the given figure, the closed loop poles ar

0 and -4

-2 ±

*j*6

2 ±

*j*6

-3 ±

*j*8

⇒

*V*

_{L}= 100 cos (10

*t*+ 30&d

116.57 sin (10

*t*- 29°) V

116.57 sin (10

*t*+ 29°) V

117.00 sin (10

*t*- 29°) V

117.00 sin (10

*t*+ 29°) V

⇒ A plot of modulation index vs carrier amplitude yields a

horizontal line

vertical line

parabola

hyperbola

⇒ The circuit in figure, is to be scaled to an impedance level of 5kΩ and resonant frequency of 5 x 10

^{6}rad/sec. The possible combination of R, L,

2.5Ω, 0.2 mH, 200 pF

5 kΩ, 0.2 mH, 200 pF

5 kΩ, 0.2 mH, 200 μF

5 kΩ, 0.1 mH, 0.4 μF

⇒

- Hall coefficient R
_{H}is directly proportional to the charge density - R
_{H}depends upon type of the semiconductor material (*n*- type or*p*- type) - Hall co-efficient R
_{H}is directly proportional to hall voltage V_{H}

I only

II only

III only

all of the above

⇒ Double integration of unit step function leads to

an impulse

a parabola

a ramp

a doublet

⇒ When analysing two port networks in parallel it is more convenient to use

*z*parameters

*h*parameters

T parameters

*y*parameters

⇒ The given figure shows a control system. The maximum value of gain for which the system is stabl

3

3

4

5

⇒ A lead compensator

speeds up the transient response

increases the stability margin

increases the stability margin and speeds up the transient-response.

none of the above.

⇒ In degenerate

*p*type semiconductor material, the Fermi level,

is in the valence band

is in conduction band

is at the centre in between valence and conduction bands

is very near conduction band

⇒ In a pure sample of silicon

the number of holes and free electrons is always equal

the number of free electrons is more than the number of holes

the number of free electrons and holes is equal at low temperature

the number of free electrons is less than number of holes

⇒ A TEM wave is incident normally on a perfect conductor. The E and H fields at boundary will respectively be

minimum and maximum

minimum and minimum

maximum and minimum

maximum and maximum

⇒ The minimum number of comparators required to build an 8 bit flash ADC is

8

63

255

256

⇒ In common base configuration, the input characteristics of bipolar junction transistor are drawn between

V

_{EB}and I

_{E}

V

_{CB}and I

_{C}

I

_{C}and V

_{CE}

I

_{E}and V

_{CE}

⇒ The ac bridge in figure is balanced. Z

_{1}= 100∠30°, Z

_{2}= 150∠0°, Z

_{3}= 250∠ - 40° Then Z

_{4375∠70° Ω375∠ - 70° Ω150∠0° Ω150∠20° Ω}

⇒ Out of S, R, J, K, Preset, Clear inputs to flip flops, the synchronous inputs are

S, R, J, K only

S, R, Preset, Clear only

Preset, Clear only

S, R only

⇒ The number of comparator circuits required to build a three-bit simultaneous A/D converter is

7

8

15

16

⇒ Typical values of voltage gain for CE, CB and CC amplifiers are

100, 100 and 1 respectively

100, 1 and 100 respectively

100, 1 and 1 respectively

1, 100 and 100 respectively

⇒ In a network

the number of tree branches is always less than the number of links

the number of tree branches is always more than the number of links

the number of tree branches and links are always equal

the number of tree branches has no relation with the number of links

⇒

**Assertion (A):** The Laplace transform of a ramp is 1/*s*^{2}.

**Reason (R):** The integral of a unit step function gives an impulse function.

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