GATE (Graduate Aptitude Test in Engineering) Physics (PE): Questions 251 - 253 of 1823

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Question 251

Appeared in Year: 2012

Question MCQ▾

Consider the motion of a classical particle in a one – dimensional double – well potential . If the particle is displaced infinitesimally from the minimum on the positive x – axis (and friction is neglected) , then – (June)

Choices

Choice (4)Response

a.

The particle will switch between the right and left wells

b.

The particle will approach the bottom of the right well and settle there

c.

The particle will execute simple harmonic motion in the right well an angular frequency

d.

The particle will execute simple harmonic motion in the right well an angular frequency

Edit

Question 252

Appeared in Year: 2012

Question MCQ▾

A magnetic field sensor based on the Hall effect is to be fabricated by implanting As into a Si film of thickness . The specifications require a magnetic field sensitivity of at an excitation current of . The implantation dose is to be adjusted such that the average carrier density, after activation, is – (December)

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 253

Appeared in Year: 2012

Question MCQ▾

The magnetization M of a ferro-magnet, as a function of the temperature T and the magnetic field H, is described by the equation . In these units, the zero – field magnetic susceptibility in terms of is given by, (June)

Choices

Choice (4)Response

a.

b.

c.

d.

Edit