GATE (Graduate Aptitude Test in Engineering) Physics: Questions 617 - 621 of 659

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Question 617

Appeared in Year: 2006

Question

MCQ▾

Three point charges and are located at and , respectively. The net dipole moment of this charge distribution is –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 618

Appeared in Year: 2006

Question

MCQ▾

Which one of the following is not a correct statement about semiconductors?

Choices

Choice (4)Response

a.

The electrons and holes have different mobility in a semiconductor

b.

Silicon has diamond structure

c.

Silicon is a direct band gap semiconductor

d.

In an type semiconductor, the Fermi level lies closer to the conduction band edge

Question 619

Appeared in Year: 2006

Question

MCQ▾

For the given transformations

and

;

where and are canonically conjugate variable, which one of the following statement is true?

Choices

Choice (4)Response

a.

(i) and (ii) are canonical

b.

Only (ii) is canonical

c.

Neither (i) and (ii) is canonical

d.

Only (i) is canonical

Question 620

Appeared in Year: 2006

Question

MCQ▾

In the given digital logic circuit, and from the input. The point is –

Circuit Diagram with Gate

Choices

Choice (4)Response

a.

b.

c.

d.

Question 621

Appeared in Year: 2006

Question

MCQ▾

The wavefunction of a particle in a one – dimensional potential at time is

Where and are the ground and first excited state of the particle with corresponding energies and . The wavefunction of the particle at a time is –

Choices

Choice (4)Response

a.

b.

c.

d.

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