Environmental Econ: Crash Course Economics #22

Adriene: Welcome to Crash Course Economics. I’m Adriene Hill Jacob: And I’m Jacob Clifford. Economics is about choices, and how we use our scarce resources. It’s not just about producing and consuming, it can also be about conserving. Adriene: Maybe counterintuitively, economics has a lot to add to discussions of how we can balance our […]

1. Class 12th Physics | Current Electricity | Electric Current | by Ashish Arora

dear students lets start with the topic of electric current. and, in your early classes you might have studied about the basic definition of current in which, we write that. rate of flow of charge. through. any cross section. of a conductor. in which current is flowing obviously we are talking about. is called. electric […]

12. Class 12 Physics | Current Electricity | Circuit Symbol of a Resistance & Equations of Ohm’s Law

let us discuss about circuit symbol of resistance and equation of ohms law. i hope all of you aware about that in. electrical circuit, resistance is represented by a zigzag line. say if there are 2 terminals ay and b. across which resistance r is connected. and say if, at terminal ay potential is v-a […]

4. Class 12th Physics | Current Electricity | Example-1 on Current Electricity | Ashish Arora

in this example we are given that in a long wire of round cross section of radius r. current density varies with the radial distance from axis of wire x as j is equal to c x square. and we are required to find the total, current flowing in the wire. it is also given […]

5. Class 12th Physics | Current Electricity | Solved Example-2 on Current Electricity | Ashish Arora

in this example we are given that in a long wire of square cross section of side length l. current density varies with distance from one edge of cross section as j is equal to ay e to power b-x amp-ere per meter square. where ay and b are positive constant and we are required […]

Electricity and Electromagnetism | NCEA Level 2 Physics Strategy Video | StudyTime NZ

– Hi, I’m Mattias and this is Hattie, and welcome to StudyTime’s Level 2 Electricity and Magnetism exam strategy video. – This exam focuses on the science behind electricity and magnetism. Where there’s two separate phenomena and together as electromagnetism. It’s really important for understanding the behavior of everyday objects, and it’s also ones of […]

6. Class 12th Physics | Current Electricity | Drift Velocity of Free Electrons

let us study about drift velocity of free electrons. we have discussed that in the situation of conductor when, a battery is connected across it. and, the circuit is closed. You can just have a look on the situation i am drawing here. this a battery which is connected across cylindrical conductors wire switch. as […]


we humans are very careless we prefer money over health meanwhile pollution is increasing significantly in the past ten years we have water purifiers to filter our water but what about air pollution do you think you’re breathing in pure air according to wh0 9 out of 10 people are breathing polluted air which kills […]

Human Eye | #aumsum

Our topic for today is Human Eye. The human eye is one of the most valuable sense organs that enables us to see the world around us. Let us study about the different parts of an eye. Sclera is a tough outer coat that protects the entire eyeball. Choroid is a vascular layer of the […]

The World’s First Human-Made Nuclear Reactor

The world’s first self-sustaining nuclear reaction did not take place in a laboratory nor did it occur in some remote desert, though that might make sense if you’re about to attempt to control a power that no one has ever attempted to control before! Instead, on December 2nd, 1942, a team of forty-nine scientists and […]