GATE (Graduate Aptitude Test in Engineering) Physics: Questions 18 - 22 of 622

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Question number: 18

» Quantum Mechanics » Angular Momentum and Spin

Appeared in Year: 2014

Short Answer Question▾

Write in Short

A hydrogen atom is in the stateEquation

Where Equation in Equation denote the principal, orbital and magnetic quantum numbers, respectively. If Equation is the angular momentum operator, the average value of Equation is________Equation .

Question number: 19

» Solid State Physics » Elements of Crystallography

Appeared in Year: 2015

Short Answer Question▾

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The lattice parameters Equation of an orthorhombic crystal are related by Equation . In units of Equation , the inter-planar separation between the Equation planes is ________ (up to three decimal places)

Question number: 20

» Electronics » Semiconductor Devices

Appeared in Year: 2015

Short Answer Question▾

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The bad gap of an intrinsic semiconductor is Equation and Equation . At 300 K, the Fermi level with respected to the edge of the valence band (in eV) is at ________ (up to three decimal places)

Equation

Question number: 21

» Classical Mechanics » Relativistic Kinematics

Appeared in Year: 2014

Short Answer Question▾

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If the half – life of an elementary particle moving with speed Equation in the laboratory frame is Equation , then the proper half – life is ________Equation . Equation

Question number: 22

» Mathematical Physics » Elements of Complex Analysis » Residue Theorem and Applications

Appeared in Year: 2014

MCQ▾

Question

The value of the integralEquation Where C is the circle Equation , is –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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