Questions 21–30 of 100. Imported answers require independent review unless marked reviewed.

Topic practice 100 questionsPage 3 of 10

Question 43

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ECMCQ2 marksNeeds review
Let

be a complex variable. If

and

is the circle in the complex plane with

then

is ______.
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Question 54

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ECMSQ2 marksNeeds review
Let

,

, and

be functions of

. Suppose that for every given pair of points

and

in space, the line integral

evaluates to the same value along any path

that starts at

and ends at

. Then which of the following is/are true?
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Question 55

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ECMSQ2 marksNeeds review
Consider the matrix

, where

is a positive real number. Which of the following vectors is/are eigenvector(s) of this matrix?
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Question 11

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ECMCQ1 markNeeds review
Let

and

be two vectors. The value of the coefficient

in the expression

, which minimizes the length of the error vector

, is
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Question 12

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ECMCQ1 markNeeds review
The rate of increase, of a scalar field

, in the direction

at a point

is
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Question 13

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Let

. Which of the following cannot be a value of

?
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Question 14

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ECMCQ1 markNeeds review
The value of the contour integral

, where the contour

is

, taken in the counter clockwise direction, is
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Question 15

Open question
ECMCQ1 markNeeds review
Let the sets of eigenvalues and eigenvectors of a matrix

be

and

, respectively. For any invertible matrix

, the sets of eigenvalues and eigenvectors of the matrix

, where

, respectively, are
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Question 36

Open question
ECMCQ2 marksNeeds review
A random variable

, distributed normally as

, undergoes the transformation

, given in the figure. The form of the probability density function of

is
(In the options given below,

,

,

are non-zero constants and

is piece-wise continuous function)
Diagram for Electronics and Communication Engineering question 36

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Question 37

Open question
ECMCQ2 marksNeeds review
The value of the line integral

along the straight line joining the points

and

is
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