GATE (Graduate Aptitude Test in Engineering) Physics: Questions 68 - 72 of 659

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Question 68

Appeared in Year: 2015

Write in Short

Short Answer▾

In the given circuit, the voltage across the source resistor is 1 V. The drain voltage (in V) is ________.

A Circuit Diagram Consist of JFET

Question 69

Appeared in Year: 2015

Question

MCQ▾

For a black body radiation in a cavity, photons are created and annihilated freely as a result of emission and absorption by the walls of the cavity. This is because –

Choices

Choice (4)Response

a.

Photons are spin – 1 particle

b.

The chemical potential of the photons is zero

c.

Photons obey Pauli exclusion principle

d.

The entropy of the photons is very large.

Question 70

Appeared in Year: 2015

Write in Short

Short Answer▾

The number of permitted transitions from in the present of a weak magnetic field is ________.

Question 71

Appeared in Year: 2015

Question

MCQ▾

Given that the magnetic flux through the closed loop PQRSP is . If along PQR, the value of along PSR is –

Showing the Closed Loop PQRSP

Choices

Choice (4)Response

a.

b.

c.

d.

Question 72

Appeared in Year: 2015

Question

MCQ▾

Consider the circuit shown in the figure, where . For an input signal shown below, choose the correct from the options:

A Circuit of an Op – Amp and Input Signal

Choices

Choice (4)Response

a.

Output Signals of Given Op – Amp: Choice A

b.

Output Signals of Given Op – Amp: Choice B

c.

Output Signals of Given Op – Amp: Choice C

d.

Output Signals of Given Op – Amp: Choice D

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