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 […]


Memories are electrical there are physical structures in the brain but if its not electrically active, there are no memories. So therefore you realise that whilst the electric switch turns on the light, and that’s very important in our lives (heats and transforms it), that piece of electricity in the brain activates your memories means […]

Generating Electricity with Vinegar | Experiment – 11 | Prakhar Trikha | Viral Video

Hi Guys Today I’ve came up with a really interesting experiment and I’m super excited about it. Its very cool I’ll generate eletricity in it. In this experiment we will generate electricity by using Vinegar Ice Tray Copper Wire Led Bulb (Indicator ) and Iron nails So first we’ll take this copper wire and peel […]

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 […]

Could We Terraform Mars?

Thanks to LEGO – presenting LEGO City – for their support of PBS Digital Studios. Humanity’s future is glorious. As we master space travel, we’ll hop from one lifeless world to the next. Life will blossom in our path and the galaxy with shimmer with beautiful Earth-like orbs. Hmmm… maybe. This won’t sound so far […]

White Holes | Space Time

This episode is supported by LegalZoom. Lurking in the depths of the mathematics of Einstein’s general relativity is an object even stranger than the mysterious black hole. In fact, it’s the black hole’s mirror twin: the white hole. Some even think that these could be the origin of our universe. The astrophysical phenomenon of the […]

How Black Holes Kill Galaxies

Thanks to Brilliant.org for supporting PBS Digital Studios Black Holes are really only dangerous if you get too close Who am I kidding ? It turns out that they may be responsible for ending Star formation across the entire Universe When we first realized that Black Holes could have masses of Millions or even Billions […]