EMF Internal Retest_II ECE_2020-2021

Which of the following are not vector functions in Electromagnetics?

• a) Gradient

• b) Divergence

• c) Curl

• d) There is no non- vector functions in Electromagnetics

A vector is said to be solenoidal when its

• a) Divergence is zero

• b) Divergence is unity

• c) Curl is zero

• d) Curl is unity

Find the Cartesian coordinates of B(4,25⁰,120⁰)

• a) (0.845, 1.462, 3.625)

• b) (-0.845, 1.462, 3.625)

• c) (-8.45, 2.462, 6.325)

• d) (8.45, 2.462, 6.325)

Using volume integral, which quantity can be calculated?

• a) area of cube

• b) area of cuboid

• c) volume of cube

• d) distance of vector

 $\nabla\cdot\left(\nabla\times\overrightarrow{F}\right)$  
What will this operation result in?

• Scalar function

• Vector function

• Undefined

The coordinate (0,0) is also known as the ___.

• y-axis
• x-axis
• origin

How do you write a pair of coordinates?

• (X,X)

• (Y,X)

• (X,Y)

• (Y,Y)

The coordinate system provides

• spatial reference

• reference data

• Relationship among the data

• None of the above

 $\nabla\cdot\left(\nabla\times\overrightarrow{F}\right)$  
What will this operation result in?

• Scalar function

• Vector function

• Undefined

A vector is said to be solenoidal when its

• a) Divergence is zero

• b) Divergence is unity

• c) Curl is zero

• d) Curl is unity