GATE (Graduate Aptitude Test in Engineering) Physics: Questions 264 - 267 of 622

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Passage

The tight binding energy dispersion Equation relation for electrons in a one – dimensional array of atoms having lattice constant Equation and total length Equation is, Equation ; where Equation and Equation are constants and Equation is the wave – vector.

Question number: 264 (2 of 2 Based on Passage) Show Passage

» Solid State Physics » Mobility and Effective Mass

Appeared in Year: 2011

MCQ▾

Question

The effective mass of electrons in the band is given by,

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 265

» Solid State Physics » Diffraction Methods for Structure Determination

Appeared in Year: 2011

MCQ▾

Question

A metal with body centered cubic Equation structure shows the first (i. e. , smallest angle) diffraction peak at a Bragg angle of Equation . The wavelength of X – ray used is Equation . The volume of the primitive unit cell of the metal is –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 266

» Electronics » Field Effect Transistors

Appeared in Year: 2011

MCQ▾

Question

In the following circuit, Equation and Equation are identical transistors having Equation . The current passing through the transistor Equation is –

A circuit diagram consists of two transistors

A Circuit Diagram Consists of Two Transistors

In figure a circuit diagram consists of two transistors is shown.

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 267

» Electronics » Basic Digital Logic Circuits

Appeared in Year: 2011

MCQ▾

Question

The following Boolean expression

Equation

can be simplified to –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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