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Q1. | A reactance function is always a quotient of |

A. | even to odd polynomials [Correct Answer] |

B. | odd to even polynomials [Wrong Answer] |

C. | even to odd or odd to even polynomials [Wrong Answer] |

D. | even to even polynomials [Wrong Answer] |

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Explanation:-
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⇒ Consider the following statements as regards BPSK and QPSK:

- In BPSK we deal individually with each bit of duration T
_{b} - In QPSK we lump two bits to form a symbol
- In both BPSK and QPSK signal changes occur at bit rate
- In QPSK the symbol can have any one of four possible values

1, 2, 3, 4

1, 2, 3

1, 2, 4

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⇒ In a thermocouple temperature transducer, the output voltage is usually measured by

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high resistance voltmeter

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none of the above

⇒ The autocorrelation function of the white noise is

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step function

constant

none of the above

⇒ Which of the following is a valid logical expression in Pascal?

2.5 : = A

(A + B) < < (C + D)

A = < B

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⇒ An angle modulated signal is expressed by

*f*(

_{a}*t*) = cos (2 x 10

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*t*) + 75 sin (2 x 10

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7.5 kHz

75 kHz

100 MHz

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⇒ A dc series motor is coupled to a load whose torque is proportional to speed. It is fed by a single phase ac supply through a full converter. When speed is 500 rpm, firing angle is 45°. It is desired to raise the speed. It will be necessary to

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⇒ The following program starts at location 0

20 H

02 H

00 H

FFH

⇒ In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will

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be doubled

be four times as high

be reduced to one fourth

⇒ If the mantissa has a sign bit of 0 and the exponent is changed from a negative number to a more positive number the result is

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⇒ In the stabilized reactance modulator AFC system

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the discriminator must have a fast time constant to prevent demodulation

the higher discriminator frequency, better the oscillator frequency stability

⇒ Read the following statements about Excel

- It supports many arithmetic functions like SUM, ABS, EXP, INT, MOD etc.
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aspect of target

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none of the above

⇒ If

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⇒ Figure shows an R-L circuit. The current is

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⇒ In a radio receiver the input from local oscillator is fed to

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mixer

IF amplifier

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⇒ In a sine wave, maximum rate of change of voltage occurs at

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- ve maximum

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less noisy

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⇒ Voltage V

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