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A photoelectric material having work-function phi 0 is illuminated with light of wavelength lemda (lemda < hc/phi 0 ). The fastest photoelectron has a de-Broglie wavelength
15
Oct
A photoelectric material having work-function phi 0 is illuminated with light of wavelength lemda (lemda < hc/phi 0 ). The fastest photoelectron has a de-Broglie wavelength A photoelectric material having work-function phi 0 is illuminated with light of wavelength lemda (lemda < hc/phi 0 ). The fastest photoelectron has a de-Broglie wavelength October 15, 2020 [...]
1. Write the answer of each of the following questions: (i) What is the name of horizontal and the vertical lines drawn to determine the position of any point in the Cartesian plane? (ii) What is the name of each part of the plane formed by these two lines? (iii) Write the name of the point where these two lines intersect.
15
Oct
1. Write the answer of each of the following questions: (i) What is the name of horizontal and the vertical lines drawn to determine the position of any point in the Cartesian plane? (ii) What is the name of each part of the plane formed by these two lines? (iii) Write the name of the [...]
Light of wavelength lemda ph falls on a cathode plate inside a vacuum tube as shown in the figure. The work function of the cathode surface is phi and the anotde is a wire mesh of conducting material
15
Oct
Light of wavelength lemda ph falls on a cathode plate inside a vacuum tube as shown in the figure. The work function of the cathode surface is phi and the anotde is a wire mesh of conducting material Light of wavelength lemda ph falls on a cathode plate inside a vacuum tube as shown in [...]
In a historical experiment to determine Planck’s constant, a metal surface was irradiated with light of different wavelengths. The emitted photoelectron energies were measured by applying
15
Oct
In a historical experiment to determine Planck’s constant, a metal surface was irradiated with light of different wavelengths. The emitted photoelectron energies were measured by applying a metal surface was irradiated with light of different wavelengths. The emitted photoelectron energies were measured by applying In a historical experiment to determine Planck's constant October 15, 2020 [...]
2. (Street Plan): A city has two main roads which cross each other at the centre of the city. These two roads are along the North-South direction and East-West direction. All the other streets of the city run parallel to these roads and are 200 m apart. There are 5 streets in each direction. Using 1cm = 200 m, draw a model of the city on your notebook. Represent the roads/streets by single lines. There are many cross- streets in your model. A particular cross-street is made by two streets, one running in the North – South direction and another in the East – West direction. Each cross street is referred to in the following manner: If the 2nd street running in the North – South direction and 5th in the East – West direction meet at some crossing, then we will call this cross-street (2, 5). Using this convention, find: (i) how many cross – streets can be referred to as (4, 3). (ii) how many cross – streets can be referred to as (3, 4).
15
Oct
2. (Street Plan): A city has two main roads which cross each other at the centre of the city. These two roads are along the North-South direction and East-West direction. All the other streets of the city run parallel to these roads and are 200 m apart. There are 5 streets in each direction. Using [...]
1. How will you describe the position of a table lamp on your study table to another person?
15
Oct
1. How will you describe the position of a table lamp on your study table to another person? 1. How will you describe the position of a table lamp on your study table to another person? October 15, 2020 Category: Chapter 3 - Coordinate Geometry , Maths , NCERT Class 9 ,
A metal surface is illuminated by light of two different wavelengths 248 nm and 310 nm. The maximum speeds of the photoelectrons corresponding to these wavelengths are u1 and u2,
15
Oct
A metal surface is illuminated by light of two different wavelengths 248 nm and 310 nm. The maximum speeds of the photoelectrons corresponding to these wavelengths are u1 and u2, A metal surface is illuminated by light of two different wavelengths 248 nm and 310 nm. The maximum speeds of the photoelectrons corresponding to these [...]
Example 25 : Factorise : 8x^3 + y^3 + 27z^3 – 18xyz
15
Oct
Example 25 : Factorise : 8x^3 + y^3 + 27z^3 – 18xyz Example 25 : Factorise : 8x^3 + y^3 + 27z^3 - 18xyz October 15, 2020 Category: Chapter 2 - Polynomials , Maths , NCERT Class 9 ,
A pulse of light of duration 100 nm is absorbed completely by a small object initially at rest. Power of the pulse is 30 mW and the speed of light is 3 * 10^8 m/s. The final momentum of
15
Oct
A pulse of light of duration 100 nm is absorbed completely by a small object initially at rest. Power of the pulse is 30 mW and the speed of light is 3 * 10^8 m/s. The final momentum of The anode voltage of a photocell is kept fixed. The wavelength lemda of the light falling [...]
Example 24 : Factorise 8x^3 + 27y^3 + 36x^2y + 54xy^2
15
Oct
Example 24 : Factorise 8x^3 + 27y^3 + 36x^2y + 54xy^2 Example 24 : Factorise 8x^3 + 27y^3 + 36x^2y + 54xy^2 October 15, 2020 Category: Chapter 2 - Polynomials , Maths , NCERT Class 9 ,