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New videos from Khan Academy 2019-05-17T19:41:02.048860
Actualizado: hace 1 hora 25 mins

Persian carpets, a peacock, and a cucumber, understanding Crivelli's Annunciation

Sáb, 2019-04-13 21:12
Carlo Crivelli, The Annunciation with Saint Emidius, 1486, egg and oil on canvas, 207 x 146.7 cm (The National Gallery, London). A conversation with Dr. Steven Zucker and Dr. Beth Harris

Electric motor (Hindi)

Vie, 2019-04-12 12:14
Let's learn the working of an electric motor, which converts electricity into a rotation.

Right hand generator rule (Hindi)

Vie, 2019-04-12 12:14
Let's learn how to use our right hand to remember the direction of the induced current when a wire is moved in a magnetic field.

Fleming's left hand rule (Hindi)

Vie, 2019-04-12 12:14
Let's solve problems on finding the direction of the force on a moving charge in a magnetic field. We will use Fleming's left-hand rule for this.

Force on a current carrying conductor in a magnetic field (Hindi)

Vie, 2019-04-12 12:14
Current carrying wires can push magnets. Can magnets push current carrying wires too? Let's find out!

Magnetic field due to current carrying loop (Hindi)

Vie, 2019-04-12 12:13
Let's explore the magnetic field generated due to the current carrying loop. The field pattern might be familiar to you

Fleming's left hand rule: Solved example (Hindi)

Vie, 2019-04-12 12:13
Let's solve problems on finding the direction of the force on a moving charge in a magnetic field. We will use Fleming's left-hand rule for this.

Right hand thumb rule (& solved example) (Hindi)

Vie, 2019-04-12 12:13
Let's learn how to use the right-hand thumb rule to find the direction of the magnetic field around a current carrying wire.

Magnetic field lines (& their properties) (Hindi)

Vie, 2019-04-12 12:13
Let's explore what magnetic field lines are, why we draw them, and what their properties are. Here is the link to the simulation. https://www.khanacademy.org/science/p...

Electromagnetic induction (& Faraday's experiments) (Hindi)

Vie, 2019-04-12 12:13
Let's learn how to produce electric current without batteries. We will recreate the two Faraday's experiments that led to it.

Electric generator (A.C. & D.C.) (Hindi)

Vie, 2019-04-12 12:13
Using simple animation let's learn how A.C. and D.C. generators (electric generators) work. #KhanAcademy #StudyWithKhan #Physics

Intro to magnetic fields (Why fields?) (Hindi)

Vie, 2019-04-12 12:13
Let's explore what magnetic fields are and why do we like to talk about them?

Oersted's experiment (& magnetic field due to current) (Hindi)

Vie, 2019-04-12 12:13
Let's explore Oersted's experiment that helped us discover the connection between electricity and magnetism. We will explore the properties of the magnetic field due to current carrying wire.

Magnetic fields through solenoids (Hindi)

Vie, 2019-04-12 12:13
Let's learn what solenoids are and why are they important. We will see that when we pass current through a solenoid, it produces a magnetic field similar to a bar magnet.

Sleeping Beauty — but without the Kiss: Burne-Jones and the Briar Rose series

Mié, 2019-04-10 14:59
Edward Burne Jones, The Briar Rose (The Briar Rose, The Council Chamber, The Garden Court, and The Rose Bower), c. 1890, oil on canvas (Buscot Park) Speakers: Dr. Beth Harris and Dr. Steven Zucker

Blythe, Justice

Lun, 2019-04-08 17:57
David Gilmour Blythe, Justice, c. 1860, oil on canvas, 51.1 x 61.3 cm (Fine Art Museums of San Francisco), a Seeing America video Speakers: Emily Jennings, Director of School and Family Programs, Fine Arts Museums of San Francisco and Beth Harris

Describing what you see: Sculpture (Henry Moore, Reclining Figure)

Sáb, 2019-04-06 15:59
Describing what you see: Sculpture Henry Moore, Reclining Figure, 1951, plaster and string, 105.4 x 227.3 x 89.2 cm (Tate Britain). © The Henry Moore Foundation. This plaster was the result of a commission from the Arts Council of Great Britain for the Festival of Britain. A single bronze was cast from it. speakers: Dr. Beth Harris and Dr. Steven Zucker

Generation and recombination in semiconductors

Jue, 2019-04-04 04:18
How many free electrons and holes are there in a pure semiconductor? In this video let's figure out how people calculate the number of electrons and holes in an intrinsic semiconductor at any given temperature. 

The landscape remade, Thiebaud's Ponds and Streams

Jue, 2019-03-28 20:35
Wayne Thiebaud, Ponds and Streams, 2001, acrylic on canvas, 182.9 x 152.4 cm (Fine Arts Museums of San Francisco, ©Wayne Thiebaud), a Seeing America video Speakers: Dr. Lauren Palmor, Assistant Curator of American Art, Fine Arts Museums of San Francisco, and Dr. Steven Zucker

Jess, If All the World Were Paper and All the Water Sink

Mié, 2019-03-27 23:27
Jess (Burgess Franklin Collins), If All the World Were Paper and All the Water Sink, 1962, oil on canvas, 96.5 x 142.2 cm (Fine Arts Museums of San Francisco), © estate of the artist, a Seeing America video Speakers: Emma Acker Associate Curator of American Art, Fine Arts Museums of San Francisco and Beth Harris

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