Electromagnetic Theory (GATE Physics): Questions 17 - 20 of 36

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Question number: 17

» 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^

Question number: 18

» Electromagnetic Theory » Solutions of Electrostatic and Magnetostatic Problems

Appeared in Year: 2012

MCQ▾

Question

Given F=r×B , where B=B0(i^+j^+k^) is a constant vector and r is the position vector. The value of CFdr , where C is a circle of unit radius centered at origin is,

Choices

Choice (4) Response
a.

1

b.

2πB0

c.

2πB0

d.

0

Question number: 19

» Electromagnetic Theory » Diffraction and Polarization

Appeared in Year: 2012

MCQ▾

Question

fdv hnjkvichnjvlkvlikjdfvhd

Choices

Choice (4) Response
a.

D2=ε0[4i^6j^+10k^]

b.

D2=ε0[4i^+6j^+10k^]

c.

D2=ε0[10i^15j^+10k^]

d.

D2=ε0[10i^+15j^+10k^]

Question number: 20

» Electromagnetic Theory » Energy and Momentum of Electromagnetic Waves

Appeared in Year: 2012

MCQ▾

Question

The space – time dependence of the electric field of a linearly polarized light in free space is given by x^E0cos(ωtkz) where E0,ω and k are the amplitude, the angular frequency and the wavevector, respectively. The time average energy density associated with the electric field is –

Choices

Choice (4) Response
a.

2ε0E02

b.

12ε0E02

c.

ε0E02

d.

14ε0E02

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