What is the polarization loss factor due to mismatch if the two linear polarized antennas are rotated by an angle ∅?

Polarization loss factor in dB when two linear polarized antennas are rotated by an angle 45° is ___

A

3dB

B

-3dB

C

0.5dB

D

-0.5dB

What is the polarization loss factor when a linear polarized antenna receives a circular polarized?

A

0.5

B

1

C

0

D

2

Polarization loss factor describes the amount of power loss due to polarization mismatch at the receiving antenna from incident wave.

A

True

B

False

The four types of polarization are Electronic Polarization, Ionic Polarization, Space-charge polarization and ______

A

Magnetic Polarization

B

Electric Polarization

C

Orientational Polarization

D

Potential Polarization

The following items consist of two statements, one labeled as “Assertion (A)” and the other labeled as the “Reason (R)”. You are to examine the two statements carefully and decide if the Assertion (A) and the Reason (R) are individually true and if so whether the reason is a correct explanation of the assertion. Select your answer to these items using the codes given below and mark your answer accordingly. Assertion (A): Polarization preserving fibers have a special core design that maintains the state of polarization. Reason (R): In polarization preserving fibers, there is a stress applying part, which creates slow and fast axes in the core.

A

Both (A) and (R) are true and (R) is the correct explanation of (A).

B

Both (A) and (R) are true, but (R) is not the correct explanation of (A)

C

(A) is true, but (R) is false.

D

(A) false, but (R) is true.

The transmission mode polarization vector and receiving mode polarization vector of antenna polarization are ___________

A

always equal

B

conjugate to each other

C

negative of conjugate of other

D

inverse of Conjugate of other vector

Which of the following losses are NOT deductible from business Income? A. Loss incurred in closing down the business B. Loss incurred due to damage destruction etc. of capital assets C. Loss of stock-in-trade due to enemy action D. Loss sustained before the business is commenced E. Loss of raw material finished good-in-transit Choose the correct answer from the options given below:

A

A, B, C only

B

A, B, D only

C

C, D, E only

D

A, D, E only

During the short-circuit test of a synchronous machine, which of the following are accounted for in the short-circuit test loss? (i), I2R loss in the armature winding due to the flow of short-circuiting (AC) current (ii) Local core loss caused by armature leakage flux (iii) Core loss due to resultant air-gap flux. (iv) Windage and friction loss

A

(i), (ii), (iii) and (iv)

B

Only (i), (ii) and (iii)

C

Only (ii), (iii) and (iv)

D

Only (i), (ii) and (iv)

Angle ‘A’ of a cyclic quadrilateral ABCD is 53° less then angle B. Angle B is twice of angle C and angle C is 40° more than angle D. What would be the measure of angle A?

A

100.57°

B

102.33°

C

115.87°

D

110.44°

Unpolarized light falls from air to a planar air-glass interface (refractive index of glass is 1.5) and the reflected light is observed to be plane polarized. The polarization vector and the angle of incidence θ_i are

A

perpendicular to the plane of incidence and θ_i = 42°

B

parallel to the plane of incidence and θ_i = 56°

C

perpendicular to the plane of incidence and θ_i = 56°

D

parallel to the plane of incidence and θ_i = 42°

What is the polarization loss factor due to mismatch if the two linear polarized antennas are rotated by an angle ∅?

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