CSIR Physical Sciences: Questions 382 - 383 of 389

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 389 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 250.00 or

Passage

The two dimensional lattice of graphene is an arrangement of Carbon atoms forming a honeycomb lattice of lattice spacing a , as shown below. The Carbon atoms occupy the vertices. (June)

The two dimensional lattice

The Two Dimensional Lattice

In figure the two dimensional lattice of graphene is an arrangement of Carbon atoms forming a honeycomb lattice spacing a is shown.

Question number: 382 (2 of 2 Based on Passage) Show Passage

» Condensed Matter Physics » Bravais Lattices

Appeared in Year: 2011

MCQ▾

Question

The Wigner – Seitz cell has an area of –

Choices

Choice (4) Response

a.

32a2

b.

332a2

c.

63a2

d.

2a2

Question number: 383

» Electronics and Experimental Methods » Semiconductor Devices » Diodes

Appeared in Year: 2011

MCQ▾

Question

The figure below shows a voltage regulator utilizing a Zener diode of breakdown voltage 5V and a positive triangular wave input of amplitude 10V.

A circuit for a voltage regulator

A Circuit for a Voltage Regulator

In figure shows a voltage regulator utilizing a Zener diode of breakdown voltage 5V.

Graph of input voltage verses time

Graph of Input Voltage Verses Time

In figure positive triangular wave of voltage passing through Zener diode is shown.

For Vi>5V , the Zener regulates the output voltage by channeling the excess current through itself. Which of the following waveforms shows the current i passing through the Zener diode? (December)

Choices

Choice (4) Response

a.

Current passing through Zener diode: Choice A

Current Passing Through Zener Diode: Choice A

In figure waveforms shows the current passing through Zener diode.

b.

Current passing through Zener diode: Choice B

Current Passing Through Zener Diode: Choice B

In figure waveforms shows the current passing through Zener diode.

c.

Current passing through Zener diode: Choice C

Current Passing Through Zener Diode: Choice C

In figure waveforms shows the current passing through Zener diode.

d.

Current passing through Zener diode: Choice D

Current Passing Through Zener Diode: Choice D

In figure waveforms shows the current passing through Zener diode.

Sign In