Electromagnetic 1 Examination Solution 2009

Fourth Stage Electromagnetic Time: 60 minutes

Sulaimani University College of Sciences Physics Department Q1/ Chose the correct answer for each of the following: 1- Which of these is correct? | | (a) (b)

·

·

·

(c)

·

along

2- The component of (a) (b)

is:

(c) /

(d) 2 , ,

3- At Cartesian point (a)

, which of these is incorrect? (c)

(b)

(d)

4- Which of the following is zero? (a)

(c)

(b)

(d)

5- If a vector field (a)

·

(d)

√

is solenoidal, which of these is true?

·

(c) (d)

(b) Q2/ Express vector

in Cartesian coordinates.

Q4/ Show that the scalar field evaluate Q3/ If around the path shown in Figure:

·

is not harmonic. .

Cylindrical Coordinate:

1 ·

1

1

1

1

1

Spherical Coordinate: 1 ·

1

1 1

1

1

1

1

1

Sulaimani University - College of Sciences - Physics Department First Examination (19/11/2008) Electromagnetic Q1/ Chose the correct answer for each of the following: 1- Which of these is correct? | | (a) (b)

·

·

·

(c) (d)

·

2- The component of (a) (b)

along (c)

/

3- At Cartesian point (a)

, ,

, which of these is incorrect? (c) (d)

4- Which of the following is zero? (a)

(c)

(b)

(d)

√

is solenoidal, which of these is true? (c) ·

(b)

(d)

Q2/ Express vector

in Cartesian coordinates.

0

But:

is:

(d) 2

(b)

5- If a vector field · (a)

·

;

1

;

tan

sin

cos

sin

cos 10

·

10

· 10

.

evaluate Q3/ If around the path shown in Figure:

·

·

1-

·

2-

·

3-

·

4-

·

·

|

2

√3

1

√3

1

√

30 |

5 60

√3

1

21√3 4

5 √3 2

5 2

21 4

27 √3 4

1

Q4/ Show that the scalar field

is not harmonic.

10 1 1

1 1

10 20

20 10 10

1

2

2

2

2

10

2

10

2

1

1

2

2

T

0 The function is not harmonic.

2

10 10