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Q1. | Ferroelectric materials are those which |

A. | cannot be polarized [Wrong Answer] |

B. | have a permanent polarization [Correct Answer] |

C. | have a_{e} equal to zero [Wrong Answer] |

D. | have μ_{p} = 0 [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 :**

⇒ It is found that in a telephone system 60 subscribers initiate calls during a 30 minute interval and the total duration of all the calls is 100 minutes. The load is

2

3 erlang

3.333 erlang

0.333 erlang

⇒ In figure if C is replaced by short circuit then R

_{B}wil

425 K

412 K

474 K

400 K

⇒ Due to which of the following reasons, the ground wave eventually disappears, as one moves away from the transmitter?

Tilting

Loss of line-of-eight conditions

Interference from the sky wave

Maximum single hop distance limitation

⇒ A volt ratio box should have low resistance.

TRUE

FALSE

⇒ The relative permeability of an iron specimen is 400 when B = 0.2 T. If B = 0.4 T, μ

_{r}will be

400

less than 400

more than 400

more or less than 400

⇒ In amplitude modulation, the magnitude of side bands is

*ma*/2 times the carrier amplitude, E

_{c}

*ma*times the carrier amplitude, E

_{c}

2

*ma*times the carrier amplitude, E

_{c}

4

*ma*times the carrier amplitude, E

_{c}

⇒ Consider a situation where number of minterms with even number of 0's are same as number of minterms with odd number of 1's. Then minterms with even number of 0's and minterms with odd number of 1's are __________ to each other then number of variables is __________ .

equivalent, even

complement, odd

complement, even

none of these

⇒ Consider the following statements

- Tellegen's theorem is applicable to any lumped network.
- Reciprocity theorem is applicable to linear bilateral network.
- Thevenin theorem is applicable to two terminal linear active network.
- Norton's theorem is applicable to linear active network.

1, 2 and 3

1, 2, 3 and 4

1, 2 and 4

3 and 4

⇒ In a series R-L circuit when excited by a 1 volt battery the current is 1 -

*e*

^{-t}. If it is excited by a source 2 sin

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*t*- 45°) +

*e*

^{-t}

2 sin (

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^{-t}

sin (

*t*- 45°) +

*e*

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sin (

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*e*

^{-t}

⇒ A function Z(

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the degree of numerator and denominator are equal

the numerator of Z(

*s*) is one degree higher than denominator

the denominator of Z(

*s*) is one degree higher than numerator

the degree of numerator and denominator are either equal or differ by one

⇒ Data can be changed from spatial code to temporal code and vice-versa by using

ADC and DAC

shift Register

synchronous counter

timers

⇒ In common base amplifier the current gain is less than one, but the voltage gain may be anywhere from

0.5 to 1

1 to 5

5 to 10

50 to 2000

⇒ If

*f*(-

*t*) =

*f*(

*t*), the function

*f*(

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TRUE

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⇒ In the given figure, the flip flop

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positive edge triggered

level triggered

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⇒ The factor which will have least effect on the voltage at the load end of a two-wire supply circuit is

length of the circuit

whether supply frequency is 25 Hz or 50 Hz

amount of load on the circuit

cross-section of the circuit wires

⇒ A satellite link uses different frequencies for receiving and transmitting in order to

avoid interference from terrestrial microwave links

avoid interference between its powerful transmitted signal and weak in coming signal

minimise free-space losses

maximise antenna gain

⇒ Television transmission is by

ground waves

sky waves

space waves

all of the above

⇒

**Assertion (A):** The response of a network to unit impulse can be obtained directly from the network function.

**Reason (R):** The response of a network for any input can be obtained from impulse response.

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

⇒

**Assertion (A):** In a BJT, a_{dc} is about 0.98.

**Reason (R):** In a BJT, recombination in base region is high.

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

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

A is true but R is false

A is false but R is true

⇒ In standard TTL, the 'totem pole' stage refers to

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phase splitter

the O/P buffer

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⇒ In 8085 the address space size is

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64 k bytes

32 kbits

16 k bytes

⇒ For a Gaussian process, auto-correlation sequence also implies that

statistical independence

statistical dependence

ergodic process

all

⇒

**Assertion (A):** In a magnitude comparator IC the cascading inputs provide a means to cascade the 4 bit comparators

**Reason (R):** A magnitude comparator has three outputs, A = B, A > B and A < B

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

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

A is true, R is false

A is false, R is true

⇒ For a second order system with 0 < ξ < 1, the angle which poles make with negative real axis is

sin

^{-1}ξ

cos

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tan

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cot

^{-1}ξ

⇒ The clock shown in figure has a frequency of 6 MHz. The frequency of the Q output wil

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24 MHz

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1.5 MHz

⇒ A pure tone at 1000 Hz has a dB level of 40 dB. If the required dB level is 100, the number of such tones is

2.5

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10

^{4}

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⇒ In which mode of circular waveguide does the attenuation continuously decrease as frequency is increased?

TE

_{01}

TE

_{11}

TE

_{05}

TE

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⇒ The impurity added to extrinsic semiconductor is of the order of

1 in 100

1 in 1000

1 in 100, 0000

1 in 100, 000, 000

⇒ Which of the following is true?

The poisson distribution is limiting case of binomial distribution.

In symmetrical distribution, the mean, median and mode coincide.

Regression is the estimation or production of unknown values of one variables from known values of another variable.

All are true.

⇒ In a telephone system, the grade of service means

the quality of sound reception at the receiver telephone

the probability that a called for connection is established

the type of wires cables used for the system

none of the above