CSIR Physical Sciences: Questions 237 - 239 of 401

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Question number: 237

» Electronics and Experimental Methods » A-D and D-a Converters

Appeared in Year: 2013

MCQ▾

Question

A 4 – variable switching function is given by, Equation ; where Equation is the do not care condition. The minimized form of Equation in sum of products (SOP) from is – (Dec– 2013)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 238

» Thermodynamic and Statistical Physics » Random Walk

Appeared in Year: 2014

MCQ▾

Question

In one dimension, a random walker takes a step with equal probability to the left or right. What is the probability that the walker returns to the starting point after 4 steps? (June – 2014)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 239

» Condensed Matter Physics » Free Electron Theory

Appeared in Year: 2014

MCQ▾

Question

The dispersion relation for electron in an f. c. c. crystal is given, in the tight binding approximation, by Equation ; where a is the lattice constant and Equation is a constant with the dimension of energy. The x – component of the velocity of the electrons at Equation is – (June – 2014)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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