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Q1. | Bitter powder patterns prove the existence of domains. |

A. | TRUE [Correct Answer] |

B. | FALSE [Wrong Answer] |

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

⇒ The relation between the apparent power, actual power and reactive power is given by

Apparent power = actual power + reactive power

Apparent power = actual power - reactive power

Apparent power = (actual power)

^{2}- (reactive power)

^{2}

Apparent power = (actual power)

^{2}+ (reactive power)

^{2}

⇒ Which type of gate is in the given fig

NOR

OR

NAND

EX-OR

⇒ In the above case if the modulating frequency is increased to 20 kHz the bandwidth will be

0.05 MHz

1 MHz

2 MHz

4 MHz

⇒ BCD numbers are useful whenever

binary to hexadecimal conversion is desired

binary to BCD conversion is desired

decimal information is transferred into or out of a digital system

none of the above

⇒ At a frequency equal to cutoff frequency in a rectangular wave guide

the flow of electromagnetic energy is zero

the flow of electromagnetic energy is infinite

the flow of electromagnetic energy is 50% of maximum

the flow of electromagnetic energy is 10% of maximum

⇒ A Hartley oscillator is used for

very low frequencies

radio frequencies

micro wave frequencies

audio frequency

⇒ For a quadratic factor in denominator of transfer function the phase angle at corner frequency (in Bode phase angle plot)

is -90°

is +90°

depends on the damping factor

none of the above

⇒ A sinusoidal voltage is written as

*v*= I

_{m}(R

^{2}+ X

_{C}

^{2})

^{0.5}sin 314

*t*. Its peak value and frequency are

I

_{m}and 50

I

_{m}(R

_{2}+ X

^{2}

_{C})

^{0.5}and 50

0.707 I

_{m}(R

_{2}+ X

^{2}

_{C})

^{0.5}and 50

2 I

_{m}(R

_{2}+ X

^{2}

_{C})

^{0.5}and 50

⇒ A memoryless source emits

*n*symbols each with a probability

*p*. The entropy of the source as a function of

*n*

increases as log

*n*

decreases as log (1/

*n*)

increases as

*n*

increases as

*n*log

*n*

⇒

**Assertion (A):** The function δ'(*t* - *b*) is equal to 0 for *t* ≠ *b*

**Reason (R):** A number of impulses spaced from one another form an impulse train.

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

⇒ When a bit is 0 is a DDR, it makes the corresponding port pin an __________ On the other hand, a 1 bit programs a __________ Pin.

output, input

output, output

input, input

input, output

⇒ A sinusoidal signal is measured by CRO. The scale is set at 4 mV/cm. If vertical distance between positive and negative peaks is 6 cm, the peak value of ac signal is

6 mV

12 mV

24 mV

3 mV

⇒ In CE amplifier the base current is very high.

TRUE

FALSE

⇒ A network has two branches in parallel. One branch contains impedance Z

_{1}and the other branch has impedance Z

_{2}. If it is fed from an ac voltage V of frequency f, the current through Z

_{1}depends, on

V, Z

_{1}, Z

_{2}

V, Z

_{1}

Z

_{1}, Z

_{2}

V, Z

_{1}, f

⇒ Which of the following is true about an impulse voltage?

It is a unidirectional voltage

Chopped impulse flashover does not occur

Time taken to rise is equal to time taken to fall

RMS value is always less than 50% of average value

⇒ In the FM wave described by equation

*v*= 15 sin (4 x 10

^{8}

*t*+ 3 sin 1100

*t*), the carrier frequency and signal frequency respectively are

63.66 MHz and 175 Hz

4 x 10

^{8}Hz and 1100 Hz

175 Hz and 63.66 MHz

1100 Hz and 4 x 10

^{8}Hz

⇒ In home tape recorders the tape width is 2 inches.

TRUE

FALSE

⇒ A 0-200 V voltmeter has an accuracy of 0.75% of full scale reading. If voltage measured is 100 V, the error is

0.03

0.02

0.015

0.0075

⇒ In a tape recorder the output from RF oscillator is given to

only erase head coil

only record head coil

coils of both erase head and record head

none of the above

⇒ Ebers Moll model is applicable to

bipolar Junction transistor

N MOS transistor

unipolar junction transistor

field effect transistor

⇒ 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

⇒ The Fourier series of an odd periodic function contains

odd harmonics only

even harmonics only

cosine harmonics only

sine harmonics only

⇒ Figure shows basic Hartley oscillator configuration. Do you think the polarities marked for the split coiled are corr

yes they are

no they are not

it really doesn't matter

none of the above

⇒ A complex wave is 5 + 5 sin ω

*t*. Its rms value is

7.07 V

5 V

10 V

6.12 V

⇒ One T state is precisely equal to one clock period.

TRUE

FALSE

⇒ When a BJT is operated under saturated condition

both junctions are forward biased

both junctions are reverse biased

CB junction is forward biased and EB junction is reverse biased

EB junction is forward biased and CB junction is reverse biased

⇒

Match the following:

List I (Diode Rectifier) | List II (Efficiency is R_{f}/R_{L} = 0.25) | ||
---|---|---|---|

A. | Half wave | 1. | 0.54 |

B. | Bridge Rectifier | 2. | 0.65 |

C. | Full wave using tapped centre transformer | 3. | 0.325 |

A-1, B-2, C-3

A-2, B-1, C-3

A-3, B-2, C-1

A-3, B-1, C-2

⇒ A two port network is reciprocal if and only if

Z

_{11}= Z

_{22}

BC - AD = - 1

Y

_{12}= Y

_{21}

*h*

_{12}=

*h*

_{21}

⇒ Internet is a worldwide network of computers where most of the information is freely available.

TRUE

FALSE

⇒ Which of the following is most likely to be found in an SSB transmitter?

Class A, RF output amplifier

Class B, RF amplifier

Tuned modulator

Class C, audio amplifier