For extrinsic semiconductors; when doping level is increased;

A certain metallic surface is illuminated by monochromatic radiation of wavelength

λ

. The stopping potential for photoelectric current for this radiation is

3 V_{0}

. If the same surface is illuminated with a radiation of wavelength

2 λ

, the stopping potential is

V_{0}

, The threshold wavelength of this surface for photoelectric effect is _______

λ

Topic:

Dual Nature of Radiation and Matter

Exam:

JEE Mains 2021 July 20 Shift 2

View 4 solutions

was produced for two slits separated by

A fringe width of

6 mm

1 mm

apart. The screen is placed

10 m

away. The wavelength of light used is ' x '

nm

. The value of ' x ' to the nearest integer is :

Topic:

Wave Optics

Exam:

JEE Mains 2021 Mar 16 Shift 1

View 2 solutions

For the given circuit, comment on the type of transformer used.

Auxiliary transformer
Step down transformer
Step -up transformer
Autotransformer

Topic:

Alternating Current

Exam:

JEE Mains 2021 Mar 16 Shift 2

View solution

A plane electromagnetic wave of frequency

100 MHz

travelling in vacuum along the

x

-direction. At a particular point in space and time,

B = 2.0 \times 1 0^{- 8} \hat{k} T

. (where

\hat{k}

is unit vector along z-direction) What is

E

. at this point ? (speed of light

c = 3 \times 1 0^{8} m / s

)

$0.6 \hat{j} V / m$
$0.6 \hat{k} V / m$
$6.0 \hat{k} V / m$
$6.0 \hat{j} V / m$

Topic:

Electromagnetic Waves

Exam:

JEE Mains 2021 Mar 18 Shift 1

View 4 solutions

Practice questions from Semiconductor Electronics: Materials, Devices and Simple Circuits in the same exam

Four NOR gates are connected as shown in figure. The truth table for the given figure is :

$A 0011 B 0101 Y 1001$
$A 0011 B 0101 Y 1010$
$A 0011 B 0101 Y 0101$
$A 0011 B 0101 Y 0110$

Topic:

Semiconductor Electronics: Materials, Devices and Simple Circuits

Exam:

JEE Mains 2021 Aug 26 Shift 2

View 2 solutions

In the adjacent circuit,And B represent two inputs and C represents the output.

The circuit represents

NOR gate
AND gate
NAND gate
OR gate

Topic:

Semiconductor Electronics: Materials, Devices and Simple Circuits

Book:

Arihant Physics JEE Main Chapterwise Solutions (2019-2002) (Arihant)

Exam:

JEE Mains 2008

View 7 solutions

A piece of copper and another of germanium are cooled from room temperature to

Easy

77 K

, the resistance of
(a) each of them increases
(b) each of them decreases
(c) copper decreases and germanium increases
(d) copper increases and germanium decreases

Topic:

Semiconductor Electronics: Materials, Devices and Simple Circuits

Book:

Arihant Physics JEE Main Chapterwise Solutions (2019-2002) (Arihant)

Exam:

JEE Mains 2003

View solution

In a semiconductor, the number density of intrinsic charge carries at

2 7^{\circ} C

1.5 \times 1 0^{16} / m^{3}

. If the semiconductor is doped with impurity atom, the hole density increases to

4.5 \times 1 0^{22} / m^{3}

. The electron density in the doped semiconductor is

1 0^{9} / m^{3}

Topic:

Semiconductor Electronics: Materials, Devices and Simple Circuits

Exam:

JEE Mains 2021 July 25 Shift 2

View solution

Practice more questions from Semiconductor Electronics: Materials, Devices and Simple Circuits

, initially a rest, undergoes alpha-decay according to the equation,

Hard

A nucleus

X

_{92}^{A} X \to_{Z}^{228} Y + α

(a) Find the values of

A

in the above process. (b) The alpha particle produced in the above process is found to move in a circular track of radius

Z

0.11 m

in a uniform magnetic field of 3 tesla. Find the energy (in

MeV

) released during the process and the binding energy of the parent nucleus

X

. Given that:

m (Y) = 228.03 amu; m (_{0}^{1} n) = 1.009 amu

m (_{2}^{4} He) = 4.003 amu; m (_{1}^{1} H) = 1.008 amu

Topic:

Semiconductor Electronics: Materials, Devices and Simple Circuits

Book:

Physics Galaxy Optics and Modern Physics Vol 4 (Ashish Arora)

View solution

With reference to semiconductor devices, define a p-type semiconductor and a Zener diode. What is the use of a Zener diode?

Easy

Topic:

Semiconductor Electronics: Materials, Devices and Simple Circuits

View solution

A signal wave of frequency

12 kHz

is modulated with a carrier wave of frequency

2.51 MHz

. The upper and lower side band frequencies are respectively (a)

2512 kHz

2508 kHz

(b)

2522 kHz

2488 kHz

(c)

2502 kHz

2498 kHz

(d)

2522 kHz

2498 kHz

Topic:

Semiconductor Electronics: Materials, Devices and Simple Circuits

Book:

Arihant Physics JEE Main Chapterwise Solutions (2019-2002) (Arihant)

Exam:

JEE Mains 2008

View solution

The value of current in the following diagram will be

Zero
$1 0^{- 2} A$
$10 A$
$0.025 A$

Topic:

Semiconductor Electronics: Materials, Devices and Simple Circuits

View 3 solutions

Practice questions on similar concepts asked by Filo students

3. wo identical charged spheres suspended from a connitially at a distance

d (d << D)

apart because of their mutual repulsion. The charges begin to leak from both the spheres approach each other with a velocity

v

. the spheres approach each other with a velocity

v

. Then

v

varies, as

{"(b) $v p ro pt o x^{- 1}$ ","(d) $v p ro pt o x$ ","(NEET-I 2016)","(c) $v p ro pt o x^{1/2}$ carrying equal charges are suspended"}

Topic:

Electrostats

View 2 solutions

A unit positive electric charge moves from infinite distance towards a given point in the electric field under the repulsive force, then it's.........

Kinetic energy keeps on increasing
Potential energy keeps on decreasing
Mechanical energy keeps on increasing (D) Kinetic energy keeps on decreasing

Topic:

Electrostats

View solution

rock climber finds himself dangling from the end of a rope that had been

After a fall, a

95 kg

15 m

long and

9, 6 mm

in diameter but has stretched by

2.8 cm .

For the rope, calculate (a) the strain,(b) the stress, and (c) the Young's modulus.

Topic:

Physics

View solution