Electromagnetics [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 7 - 9 of 96

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Question 7

Electromagnetics
Differential and Integral Forms and Their Interpretation

Appeared in Year: 2018 (UGC-NET)

Question

Assertion-Reason▾

Assertion(Ꭺ)

The magnetic flux per unit length through a loop of small length is called the magnetic flux density. (July)

Reason(Ꭱ)

The direction of magnetic flux density is taken as the normal to the plane of the loop when oriented to enclose maximum flux.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Ꭺ is false but Ꭱ is true

Question 8

Electromagnetics
Equations

Appeared in Year: 2018 (UGC-NET)

Question

Assertion-Reason▾

Assertion(Ꭺ)

For transmission lines, having their length equal to odd multiple of , the following expression are given sin =

(July)

Reason(Ꭱ)

Under the above conditions, i.e.. for odd multiples of Quarter wavelengths the input impedance becomes equal to

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are false

d.

Ꭺ is false but Ꭱ is true

Question 9

Electromagnetics
Differential and Integral Forms and Their Interpretation

Appeared in Year: 2016 (UGC-NET)

Question

Assertion-Reason▾

Assertion(Ꭺ)

In Electromagnetics, materials are divided roughly into two classes, i.e.. conductors and dielectrics or insulators.

Reason(Ꭱ)

In Maxwell equation, σ/ω decides, whether the medium is a good conductor or a dielectric.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are false

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

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