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UP polytechnic Lecturer (EE) Paper-2 Quiz 50

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Question 1

In dc chopper, the waveforms for input and output voltage are respectively:-

Question 2

_l and

_p represent the impurity scattering and phonon scattering limited values of mobility of a semiconductor, the overall mobility would be

Question 3

A four-quadrant operation requires

Question 4

A phase locked loop (PLL) is a feedback circuit consisting of a:-

Question 5

Find the number of poles of a 3-phase induction motor when synchronous speed of motor is 600 rpm and supply frequency is 50 Hz.

Question 6

Kick fuses are used across relay coils to prevent relay operation during

Question 7

The function

in canonical sum of product form

Question 8

The conversion of decimal 0.0625 into its binary equivalent will be

Question 9

The duty cycle of the most significant bit (MSB) from a 4-bit BCD counter is ____________

Question 10

A stepper motor is a _______ device

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Dec 10AE & JE Exams