Questions 291–300 of 715. Imported answers require independent review unless marked reviewed.

Topic practice 715 questionsPage 30 of 72

Question 31

Open question
EENAT1 markNeeds review
In the circuit shown below, the switch

is closed at

. The magnitude of the steady state voltage, in volts, across the 6

resistor is ________. (round off to two decimal places)
Diagram for Electrical Engineering question 31


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Question 32

Open question
EENAT1 markNeeds review
A single-phase full-bridge diode rectifier feeds a resistive load of 50

from a 200 V, 50 Hz single phase AC supply. If the diodes are ideal, then the active power, in watts, drawn by the load is ____________. (round off to nearest integer).

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Question 33

Open question
EENAT1 markNeeds review
The voltage at the input of an AC-DC rectifier is given by

where

rad/s. The input current drawn by the rectifier is given by

The input power factor, (rounded off to two decimal places), is __________________ lag.

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Question 34

Open question
EENAT1 markNeeds review
Two balanced three-phase loads, as shown in the figure, are connected to a 100

V, three-phase, 50 Hz main supply. Given

and

. The ammeter reading, in amperes, is ________. (round off to nearest integer)
Diagram for Electrical Engineering question 34


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Question 35

Open question
EENAT1 markNeeds review
The frequencies of the stator and rotor currents flowing in a three-phase 8-pole induction motor are 40 Hz and 1 Hz, respectively. The motor speed, in rpm, is ________________. (round off to nearest integer)

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Question 36

Open question
EEMCQ2 marksNeeds review
The output impedance of a non-ideal operational amplifier is denoted by

. The variation in the magnitude of

with increasing frequency,

, in the circuit shown below, is best represented by
Diagram for Electrical Engineering question 36

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Question 37

Open question
EEMCQ2 marksNeeds review
An LTI system is shown in the figure where

The steady state output of the system, to the input

, is given as

. The values of ‘

’ and ‘

’ will be
Diagram for Electrical Engineering question 37

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Question 38

Open question
EEMCQ2 marksNeeds review
The open loop transfer function of a unity gain negative feedback system is given as

. The Nyquist contour in the s-plane encloses the entire right half plane and a small neighbourhood around the origin in the left half plane, as shown in the figure below. The number of encirclements of the point (

) by the Nyquist plot of

, corresponding to the Nyquist contour, is denoted as

. Then

equals to
Diagram for Electrical Engineering question 38

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Question 39

Open question
EEMCQ2 marksNeeds review
The damping ratio and undamped natural frequency of a closed loop system as shown in the figure, are denoted as

and

, respectively. The values of

and

are
Diagram for Electrical Engineering question 39

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Question 40

Open question
EEMCQ2 marksNeeds review

denotes the exponential of a square matrix

. Suppose

is an eigenvalue and

is the corresponding eigen-vector of matrix

. Consider the following two statements: Statement 1:

is an eigenvalue of

. Statement 2:

is an eigen-vector of

. Which one of the following options is correct?
Your answerChoose one option.

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