Showing posts from May, 2020


WILHELM CONRAD RONTGEN Born On: 27th March 1845. Died On: 10th February 1923.     Wilhelm Rontgen born in Lennes, Germany. His father is a farmer and his mother is a homemaker. He studied in Holand. He did Ph.D. at Zurich University , Switzerland. After his Ph.D. he joined as a Physics professor at Fritzberg University . While working in this university he accidentally identified X-rays. For this discovery, he got Noble prize in the year 1901. He the first Physicist who got Noble Prize in Physics. X-rays:             Very high-frequency electromagnetic radiation (more frequency than UV rays)  Applications of X - rays :         X - rays are having plenty of uses/applications. Those are To identify flaws in the heavy machines. To identify the uniform thickness of metal sheets, tennis balls, etc. Using to remove the stones in the kidneys. Using in cancer treatment. To identify the structure of the crystals. A useful tool in crystallography research. Using X

Generate Electricity from Waste Water

To Generate Electricity from Waste Water   in Multi-storied Buildings Summary:        In   the modern world, the lifestyle of human beings has changed a lot. A large number of people now live in multi-storied apartments . Each of these apartments uses a huge amount of water and leave it as wastewater to the drainage. We are suggesting to store this waste in the middle floor in tanks instead of leaving it to the drainage. This stored water when allowed to flow from a height will have enough kinetic energy to rotate the turbine and generate electricity. The electricity, thus, produced can be used common lights and elevators. Further, the water coming out of the turbine can be purified and reused in the toilets. The non-purified water can be soaked in the pits to increase the level of groundwater . The scarcity of power and water is felt in urban areas all over the world more so in developing countries. The suggested plan will enable us to solve the problem to some extent and


ABOUT BENJAMIN FRANKLIN BORN IN THE YEAR: 17th January 1706. DIED ON: 17th April 1790.         Benjamin Franklin was an American Scientist . He is not only a Scientist but also an Inventor, Political Philosopher , Statesman , and diplomat . He involved in the development of the constitution so he is also called one of the fathers of the United States. Benjamin showed more interest in the  Chess game. He did more research on electricity. His father is a small businessman and poor. Even then with his hard work and innovative thinking he becomes more popular at that time. Benjamin Contributions in Science: He studied about thunders and electric charges in the clouds. Benjamin designed Lightning Conductors to save the big buildings form the thunders. Still, we are using lightning conductors as an earthing wire (metal wire) to save from the thunders. He invented a wood burning Stove . Benjamin supported the wave theory of light proposed by Huygen. Benjamin identifie

Blaise Pascal

About BLAISE PASCAL Born In the Year: 1623. Died in the Year:  1662.           Blaise Pascal was a French Scientist . From his childhood, he showed more interest in geometry . With his curiosity and analytical thinking, he proposed a theory that the sum of the three angles in a triangle is equal to the sum of two right angles. His father an accountant. To help his father in calculations he designed a machine, later on, it leads to developing a calculator.  His contributions to the Science: Pascal showed that the sum of the three angles in a triangle is equal to the sum of two right angles. He designed a theorem called the Universal theorem of geometry. Pascal designed a machine to do calculations like sums, subtractions, multiplications, and divisions. He is famous for his theory of  Pascal's law in physics i.e. pressure at a point in a liquid is the same in all directions.  Based on Pascal's law Hydraulic lifts  and Hydraulic breaks are designed. He


               In the CBSE curriculum, every year Class 12 Science students have to appear for Practical examination. In the Physics practical examination students have two practicals one from section A and other from section B in the presence of an external assigned by the CBSE board. The model practical question paper will be as shown below. CBSE PRACTICAL QUESTION PAPER   AISSCE (PRACTICAL) CLASS – 12 – 2020 Subject: PHYSICS (042)                                            Date: __,__, 202_. COLLEGE / SCHOOL NAME: COLLEGE/SCHOOL CODE:  (CBSE affiliation code)                                                       Time: 3 hr. QUESTION PAPER SECTION – A                                1 X 8 M = 8 M To find the linear resistance (σ) of a given wire by using a graph between potential difference versus current. To verify the law of combination of series/parallel of resistances using the practical form of Wheatstone bridge (Meter bridge) To find the in

Motion in a plane class 11 important questions

MOTION IN A PLANE Topics to be focused in this lesson Scalar product Resultant of vectors Projectile motion Uniform circular motion Very short answer questions  Define a) Unit vector  b) Null vector    c) Co-planar vector   The vector A has a magnitude of 5 unit, B has a magnitude of 6 unit and the cross product  A and B has the magnitude of 15 unit. Find the angle between A and B. A projectile is fired at an angle of 45 o and reaches the highest point in its path in 2 √2 If air resistance is neglected, find the maximum height reached by it. A boy can throw a ball 40 m vertically upward. find the greatest horizontal distance he can throw by the boy. The speed of a projectile at its maximum height is 6 m/s.  If it stays in the air for a total time of 8 seconds, find its horizontal range. A projectile is thrown to have maximum horizontal range on the ground. Find the ratio of the horizontal and vertical components of its initial velocity. Two stones are thrown eac