Q1. | The direction of rotation of a CD is |

A. | clockwise [Wrong Answer] |

B. | anticlockwise [Correct Answer] |

C. | clockwise or anticlockwise depending on frequency of data stored [Wrong Answer] |

D. | mostly anticlockwise but some times clockwise [Wrong Answer] |

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Explanation:-
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⇒ In an impedance smith chart, a clockwise movement along a constant resistance circle gives rise to

decrease in the value of reactance

an increase in the value of reactance

no change in the reactance value

no change in the impedance value

⇒ Forbidden energy gap in germanium at 0 K is about

10 eV

5 eV

2 eV

0.78 eV

⇒ A 12-bit binary counter has the following state. The octal number represente

677

7163

7128

7183

⇒ The circuit in the given figur

low pass filter

high pass filter

band Pass filter

band reject filter

⇒ A nibble corresponds to

2 successive bits of data

4 successive bits of data

8 successive bits of data

16 successive bits of data

⇒ A single turn loop is situated in air, with a uniform magnetic field normal to its plane. The area of the loop is 5 m

^{2}and the rate of change of flux density is 2 Wb/m

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-5 V

-2 V

-0.4 V

0 V

⇒ For a transfer function the coefficients of the numerator and denominator polynomials in s must be real.

TRUE

FALSE

⇒

**Assertion (A):** The circuit in figure produces repetitive narrow pulses when input is fed with sine or triangular waveform having peak value more than + V

**Reason (R):** The high gain op-amp produces voltages at two levels. If input is more than + V, the output is + 15 V otherwise the output is - 1

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

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⇒ For resonant long wire antenna '*n*' half wavelength long in free space, if '*n*' is increased then inclination of the major lobe with wire axis will __________ .

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none

⇒ The purpose of series quadrature windings in amplidyne is to

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increase the gain

increase response time

⇒ Find V_{x} V_{y} V_{zVx = -6 Vy = 3 Vz = -3Vx = -6 Vy = -3 Vz = 1Vx = 6 Vy = 3 Vz = 3Vx = 6 Vy = 1 Vz = 3}

⇒ On which bands, do the optical fibers operate?

1 only

1 and 2 only

1, 2 and only

1, 3 and 4

⇒ A better SNR can be obtained in a PCM by

increasing sampling rate above Nyquist rate

decreasing the code bits

reducing channel bandwidth

increasing Quantization levels

⇒ If

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^{k}*and*

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FALSE

⇒ An amplifier has open loop gain of 100, input impedance 1 kΩ and output impedance 100 Ω. If negative feedback with β = 0.99 is used, the new input and output impedances are

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⇒ All network theorems of dc are applicable to ac also with different quantities taken as phasors.

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⇒ In a positive edge triggered JK flip flop, J = 1, K = 0 and clock pulse is rising Q will

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⇒ Degaussing in a picture tube means

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Removing residual magnetism in mask, shield etc...

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⇒ The switch in the circuit shown was on position

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*t*> 0 is give

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*u*(

*t*) mA

20

*e*

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*u*(

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20

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⇒ The Y plates of a CRO are excited by a voltage 2 sin 100

*t*and the X plates are not connected. The display would be

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⇒ A notch filter is sometimes used in communication receivers to

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increase receiver gain at some specific frequency

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spread the bandwidth

⇒ The signal flow graph of a system is shown in the given figure. The effect of disturbance T

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decreasing G

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increasing G

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TE waves

TM waves

TE and TM waves

TEM waves

⇒ In static RAM 6264 the number of address inputs are

10

12

13

15

⇒ The Hilbert transform of cos ω

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*t*is

sin ω

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*t*- cos ω

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*t*

cos ω

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*t*- cos ω

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*t*

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*t*+ sin ω

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⇒ In amplitude modulation

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⇒ What is typical bandwidths of a 2-wire telephone line?

300 Hz to 3.4 kHz

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6