GATE (Graduate Aptitude Test in Engineering) Physics: Questions 75 - 79 of 622

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Question number: 75

» Classical Mechanics » Lorentz Transformations

Appeared in Year: 2014

MCQ▾

Question

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

Choices

Choice (4) Response

a.

Charge

b.

Electric field

c.

Charge density

d.

Current

Question number: 76

» Quantum Mechanics » Angular Momentum and Spin

Appeared in Year: 2015

MCQ▾

Question

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

Choices

Choice (4) Response

a.

Equation

b.

0

c.

Equation

d.

Equation

Question number: 77

» Electromagnetic Theory » Electromagnetic Waves and Their Reflection

Appeared in Year: 2014

Short Answer Question▾

Write in Short

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

Equation

The phase velocity of the wave is ________Equation

Question number: 78

» Nuclear and Particle Physics » Conservation Laws

Appeared in Year: 2015

MCQ▾

Question

The decay Equation is forbidden, because it violates –

Choices

Choice (4) Response

a.

Baryon and lepton number conservation

b.

Angular momentum conservation

c.

Momentum and lepton number conservations

d.

Lepton number conservation

Question number: 79

» Nuclear and Particle Physics » Nuclear Models

Appeared in Year: 2014

Short Answer Question▾

Write in Short

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

(Given the value of Bohr magneton Equation )

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