Electromagnetic Theory-Poynting Vector (GATE Physics): Questions 1 - 2 of 2

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Question number: 1

» Electromagnetic Theory » Poynting Vector

Appeared in Year: 2016

MCQ▾

Question

The electric field component of a plane electromagnetic wave travelling in vacuum is given by E(z,t)=E0cos(kzωt)i^ . The Poynting vector for the wave is –

Choices

Choice (4) Response
a.

(cε02)E02cos2(kzωt)k^

b.

cε0E02cos2(kzωt)k^

c.

cε0E02cos2(kzωt)j^

d.

(cε02)E02cos2(kzωt)j^

Passage

A plane electromagnetic wave has the magnetic field given by,

B(x,y,z,t)=B0sin[(x+y)k2+ωt]k^;

where, k is the wave number and i^,j^andk^ are the Cartesian unit vector in x,yandz directions, respectively.

Question number: 2 (1 of 1 Based on Passage) Show Passage

» Electromagnetic Theory » Poynting Vector

Appeared in Year: 2011

MCQ▾

Question

The average Poynting vector is given by,

Choices

Choice (4) Response
a.

cB022μ0(i^+j^)2

b.

cB022μ0(i^+j^)2

c.

cB022μ0(i^j^)2

d.

cB022μ0(i^j^)2

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