Q. Light of wavelength 2000 Angstrom falls on a metal surface of work function 4.2 ev. What is the kinetic energy in ev of fastest and slowest photo electron emitted from the surface?

Kumar Ankit 6 years, 6 months ago

False

Preet Kaur 6 years, 6 months ago

False

Varsha Shahi 6 years, 6 months ago

False

Chanchal Rathore 6 years, 6 months ago

Ture

ANSWER

Test match kal suru hoga, konsa tense hai

Posted by Ritesh Kumar 6 years, 6 months ago

CBSE > Class 12 > English Core

2 answers

Gursharn Kaur 6 years, 6 months ago

Test match is beginning from next day

Gursharn Kaur 6 years, 6 months ago

Future

ANSWER

A compound forms h.c.p structure.calculate the total number of void in 0.5 mol of it

Posted by Mintu Bez Baruah 6 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Sir and mame kal mujhe mere history ke number Pata chle 46 thein mein bahut hi bura feel kar raha hu ab mein kya karu plzz guide me

Posted by Dharmender Kumar 6 years, 6 months ago

CBSE > Class 12 > इतिहास

2 answers

Minakshi Charan 6 years, 6 months ago

Ab aap History me high score karne ke liye History ke last 10 years ke paper read aur learn kar lo ..isse aap board me 80 me se 75 to definitely score kar sakte ho so phle 10 years karo...??

5Thank You

Harsh Mishra 6 years, 6 months ago

Out of 50, Bhaiya.....

ANSWER

All have to tell me your school guys

Posted by Tannu Madaan 6 years, 6 months ago

CBSE > Class 12 > English Core

4 answers

Ritesh Kumar 6 years, 6 months ago

What is this

Varsha Shahi 6 years, 6 months ago

Sabi

Alu Chalu 6 years, 6 months ago

K.V. SEONI MALWA

Ritesh Kumar 6 years, 6 months ago

What

ANSWER

Swartz rxn

Posted by Tannu Madaan 6 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Chetna Regar 6 years, 6 months ago

When alkyl chloride or alkyl bromide react with Agf,Hg2f etc. there Will be form alkyl Floride

Unique Girl.. ? 6 years, 6 months ago

What

ANSWER

Tell me your school name

Posted by Tannu Madaan 6 years, 6 months ago

CBSE > Class 12 > English Core

3 answers

Vansh Sharma 6 years, 6 months ago

You tell me first

Varsha Shahi 6 years, 6 months ago

Genius global academy

Rushal Thakur 6 years, 6 months ago

Gov boys sen sec shoop

ANSWER

Three point charges of equal mangnitude and same nature 'q' are placed at the vertex of an equilateral triangle of side 'a' . Find electric field itensity at the center of triangle . ?

Posted by Yugratan Kumar 6 years, 6 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Two charges +q are separated by distance 'd' and a third charge 'Q' is placed at the line joining both charges so that the net force acting on 'Q' is zero . Find the location , nature and magnitude of charge 'Q' . ?

Posted by Yugratan Kumar 6 years, 6 months ago

CBSE > Class 12 > Physics

1 answers

Anjali Jain 6 years, 6 months ago

Location is at the a/2. nature can be negative or positive both. Magnitude is q/2 since the forces must balance each other.

ANSWER

Explain the concept of excess demand and deficit demand ?

Posted by Vaishnavi Mishra 6 years, 6 months ago

CBSE > Class 12 > Economics

0 answers

ANSWER

What was the problem faced by the peasants of champaran?

Posted by Meena Jadav 6 years, 6 months ago

CBSE > Class 12 > English Core

0 answers

ANSWER

Two charges +4e and +e are separated by distance d . A third charge 'q' is kept at the line joining both charges so that charge 'q' remains in equilibrium . Find the position , nature and magnitude of third charge 'q' . ?

Posted by Yugratan Kumar 6 years, 6 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Analyse the problems being faced by the archaeologists to recontruct the religion practices of harappans

Posted by Preeti Preeti 6 years, 6 months ago

CBSE > Class 12 > History

0 answers

ANSWER

Integrate sin√x

Posted by Amul Sharma 6 years, 6 months ago

CBSE > Class 12 > Mathematics

1 answers

Ganesh Gani 6 years, 6 months ago

Take √x will be t

ANSWER

"Planning is to vital importance in the managerial procesa". Do you agree ? Explain in brief any three reason in support of your answer

Posted by Bhavya Singhal 6 years, 6 months ago

CBSE > Class 12 > Business Studies

1 answers

Devansh Mohan 6 years, 6 months ago

Yes, planning has a vital importance in management process because - 1 - as it gives direction to achieve our objectives. 2 - it facilitate decision making with carefull future assumptions. 3 - it is also considered as a primary function as it helps to achieve our goals. Done!?

ANSWER

"Coordination is the orderly arragement of group efforts to prove unity of action in the pursuit of common purpose ". in the light of the statement , explain the nature of coordination

Posted by Bhavya Singhal 6 years, 6 months ago

CBSE > Class 12 > Business Studies

1 answers

Devansh Mohan 6 years, 6 months ago

Nature of coodination explain in the following points as - 1 - coordination is the essence of management. 2 - it is required to perform all the functions of management. 3 - it is a force that binds all the other functions of management. 4 - it make sure that planned objectives are achieved with minimum efforts.

ANSWER

Hire purchase

Posted by Biswanath Majhi 6 years, 6 months ago

CBSE > Class 12 > Accountancy

0 answers

ANSWER

one of the objectives of management is to consistently createand economic value forvarious constituents of the society..give two examples of this objective

Posted by Priyanka Kataria 6 years, 6 months ago

CBSE > Class 12 > Business Studies

1 answers

Devansh Mohan 6 years, 6 months ago

Examples are - 1 - organistion should lift up the living standard of the weaker section 2 - it should provide financial help to the community.

ANSWER

What is mutarotation? Explain with example.

Posted by Deeya Singh 6 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 6 years, 6 months ago

Mutarotation refers to the spontaneous change in the optical rotation of a freshly prepared solution of an optically active compound with time. All monosaccharides exhibit mutarotation in aqueous solutions.
For example: The specific rotation of a freshly prepared solution of alpha-D-glucose gradually decreases from +112 to +52.7 while that of beta-D-glucose increases from +19 to +52.7 with time. This change in specific rotation of an optically active compound in solution with time, to an equilibrium value, is an example of mutarotation.

ANSWER

How to done project work

Posted by Abhishek Gupta 6 years, 6 months ago

CBSE > Class 12 > राजनीति विज्ञान

0 answers

ANSWER

What is the time period of sinx ??

Posted by Utkarsh Mishra 6 years, 6 months ago

CBSE > Class 12 > Mathematics

3 answers

Vishal Kumar Sahu 6 years, 6 months ago

Time period of sinx is {2π

Shatayu Ganvir 6 years, 6 months ago

All trigonometric functions have a period of "2π"

Aditya Raj 6 years, 6 months ago

Time period of sinx is {2π}

ANSWER

What is the dimension of magnetic field 'B'

Posted by Vaibhav Singh 6 years, 6 months ago

CBSE > Class 12 > Physics

2 answers

Gursharn Kaur 6 years, 6 months ago

B= f/ qv U can calculate using this

Sohan .G 6 years, 6 months ago

[M L^0 T^-2 A^-1]

ANSWER

What is carbohydrate?

Posted by Rahul Bidiyasar 6 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Sohan .G 6 years, 6 months ago

Carbohydrates may be defined as optically active polyhydroxy aldehydes or ketones or the compounds which produce such units on hydrolysis

ANSWER

Structure of personality

Posted by Bhupendra Singh Bhupendra Singh 6 years, 6 months ago

CBSE > Class 12 > Psychology

1 answers

Sayan Ray 6 years, 4 months ago

Id, ego and superego

ANSWER

Application of gauss law

Posted by Kunj Parmar 6 years, 6 months ago

CBSE > Class 12 > Physics

1 answers

Gaurav Seth 6 years, 6 months ago

According to Gauss’s law, the total of the electric flux out of a closed surface is equal to the charge enclosed divided by the permittivity. The total electric flux through a closed surface is zero if no charge is enclosed by the surface.

Gauss’s law is true for any closed surface, no matter what its shape or size.
The term q on the right side of Gauss’s law includes the sum of all charges enclosed by the surface. The charges may be located anywhere inside the surface.
In the situation when the surface is so chosen that there are some charges inside and some outside, the electric field is due to all the charges, both inside and outside S. The term q on the right side of Gauss’s law, however, represents only the total charge inside S.
The surface that we choose for the application of Gauss’s law is called the Gaussian surface. The Gaussian surface can pass through a continuous charge distribution.
Gauss’s law is useful for the calculation of the electrostatic field for a symmetric system.
Gauss’s law is based on the inverse square dependence on distance contained in the Coulomb’s law. Any violation of Gauss’s law will indicate departure from the inverse square law.

ANSWER

When 0.1 mole of MnO4²- is oxidised, the quantity of electricity required to completely oxidise MnO4²- to MnO4-

Posted by Diana Sagolsem 6 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Harsh Mishra 6 years, 6 months ago

Copied it from Zigya.com Nice Work, Gaurav Bro.......

Gaurav Seth 6 years, 6 months ago

Answer is: 9650 C

Explanation is given below:

As per the equation, for 1 mole of MnO₄^2-, 1F of electricity is required. Thus, for 0.1 mole of MnO₄^-, 0.1 F of electricity is required.

Since, 1 F = 96500 C
0.1 F = 0.1 x 96500 C
= 9650 C
Hence, 9650 C of electricity is required to completely oxidise MnO₄^2- to MnO₄^-

ANSWER

Light of wavelength 2400Å falls on a metal surface of work function 3.6eV what is the kinetic energy in electron volt of the (i)fastest and (ii)the slowest electrons emitted from the surface

Posted by Sohan .G 6 years, 6 months ago

CBSE > Class 12 > Physics

3 answers

Harsh Mishra 6 years, 6 months ago

I know that You'd copied it from Meritnation, Gaurav Bhaiya.....But, I'm not going to do the Same.....

Well, Vandana If you want similar Questions, So You'n try my home website Brainly.... we don't get the exact Q. there but a lot of similar ones..... For Instance :-

Q. Light of wavelength 2000 Angstrom falls on a metal surface of work function 4.2 ev. What is the kinetic energy in ev of fastest and slowest photo electron emitted from the surface?

</article> <section id="answers">

Hope this helps you....

</section>

Harsh Mishra 6 years, 6 months ago

Kya Hua Gaurav Bhaiya, Copy karne ke liye exact Answer naheen Mila.....That's why, You're advising us to do the similar Question!!!

Gaurav Seth 6 years, 6 months ago

Take help from similar ques:

Light of wavelength 2500Å falls on a metal surface of work function 3.5V. What is the kinetic energy (in eV) of (i) the fastest and (ii) the slowest electronic emitted from the surface? If the same light falls on another surface of work function 5.5eV, what will be the energy of emitted electrons?

Wavelength of incident radiation (λ) = 2500Å

Work function (W₀) =3.5eV

(i) KE of fastest electron =1.47eV
(ii) KE of slowest electron = 0eV
If the same light (having energy 4. 97eV) falls on the surface (of work function 5.5eV), then no photoelectrons will emit.