GATE (Graduate Aptitude Test in Engineering) Physics: Questions 73 - 78 of 659

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Question 73

Appeared in Year: 2015

Question

MCQ▾

Which one of the following DOES NOT represent an exclusive OR operation for input A and B?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 74

Appeared in Year: 2014

Question

MCQ▾

Which one of the following quantities is invariant under Lorentz transformation?

Choices

Choice (4)Response

a.

Current

b.

Charge

c.

Electric field

d.

Charge density

Question 75

Appeared in Year: 2015

Question

MCQ▾

Let L and p be the angular and linear momentum operates, respectively for a particle. The commutator gives –

Choices

Choice (4)Response

a.

b.

0

c.

d.

Question 76

Appeared in Year: 2014

Write in Short

Short Answer▾

The electric field of a uniform plane wave propagating in a dielectric, non – conducting medium is given by,

The phase velocity of the wave is ________

Question 77

Appeared in Year: 2015

Question

MCQ▾

The decay is forbidden, because it violates –

Choices

Choice (4)Response

a.

Angular momentum conservation

b.

Baryon and lepton number conservation

c.

Momentum and lepton number conservations

d.

Lepton number conservation

Question 78

Appeared in Year: 2014

Write in Short

Short Answer▾

For Nickel the number density is and electronic configuration is . The value of the saturation magnetization of Nickel in its ferromagnetic state is .

(Given the value of Bohr magneton )

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