CBSE > Class 12 > Physics | CBSE Board | Homework Help

The phenomenon of interference takes place due to the superposition of two separate wavefronts coming from the two coherent source . The phenomenon of diffraction takes place due to the superposition of secondary wavelets coming from the different points of the same wavefront.

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What is Huygenprinciples ?

Posted by Amrit Lal Koli 7 years, 1 month ago

CBSE > Class 12 > Physics

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What is the value of sin inverese

Posted by Shobha??? Kumari 7 years, 1 month ago

CBSE > Class 12 > Physics

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Total magnification produced by a compound microscope is 20 while magnification produced by the eyepiece is 5 the distance between objective and eyeliece is found to be 14 cm when it is focussed on an object calculate the focal length of objective and eyepiece if the least distance of distinct vission is 20 cm

Posted by Rohit Kumar 7 years, 1 month ago

CBSE > Class 12 > Physics

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Coloumb law for acting between two definite points

Posted by Sachin Jhajhria 7 years, 1 month ago

CBSE > Class 12 > Physics

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Ashutosh Kumar Singh Raja 7 years, 1 month ago

I does

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What is meaning of perpendicular current in solinoid and toroid

Posted by Karan Kumar 7 years, 1 month ago

CBSE > Class 12 > Physics

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Can we say drift velocity is an varaible velocity

Posted by Karan Kumar 7 years, 1 month ago

CBSE > Class 12 > Physics

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Why copper strip is thick in slide wire bridge and potentiometer

Posted by Karan Kumar 7 years, 1 month ago

CBSE > Class 12 > Physics

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Karan Kumar 7 years, 1 month ago

Yes its true

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Harshita Paliwal 7 years, 1 month ago

This is because to have a minimum resistance in a wire

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Rainbow topic of ch ray optics is there in the portion are not

Posted by Jayaasrii?? Jayaasrii 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Amandeep Kumar 7 years, 1 month ago

Yes it is there

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q1+q2<0 define the electroststic force between them two charge?

Posted by Kanu Taunk 7 years, 1 month ago

CBSE > Class 12 > Physics

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OHM's law derivations

Posted by Ayush Singh 7 years, 1 month ago

CBSE > Class 12 > Physics

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Karan Kumar 7 years, 1 month ago

SI unit of resistance is = ohm and omega

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Karan Kumar 7 years, 1 month ago

At the constant temprature potentianl defference across end of the conducter is directly prop to electric current in it derivation = V direct prop to I then V=IR ,I=V/R,R=V/I where R is resistance of condector (opposition ot current)

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With the help of circuit diagram explain in brief the use of a potentiometer for comparison of EMF of two cells.

Posted by Karunesh Gaur 7 years, 1 month ago

CBSE > Class 12 > Physics

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How is the sensitivity of potentiometer increased?

Posted by Karunesh Gaur 7 years, 1 month ago

CBSE > Class 12 > Physics

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Harshita Paliwal 7 years, 1 month ago

Sensitivity of a potentiometer increases by increasing its length

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Two particles have equal momenta. Calculate ratio of de brogeli wavelength?

Posted by Anjali Yadav 7 years, 1 month ago

CBSE > Class 12 > Physics

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A sunshine recorder globe of30cm diameter is made of glass of r.i 1.5.a ray enter globe parallel to the find position from centre of sphere where ray crosses the axid

Posted by Sunaina Kushwaha 7 years, 1 month ago

CBSE > Class 12 > Physics

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Use hyugens prinviple to show how a plane wavefront propagate from rarer to denser nedium.hence.verify snell law

Posted by Juhi Ghosh 7 years, 1 month ago

CBSE > Class 12 > Physics

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What is electric charge

Posted by Neelam Neelam 7 years, 1 month ago

CBSE > Class 12 > Physics

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Kartik Kathuria 7 years, 1 month ago

It is an intrinsic proprty of elemantary partickes

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Derivation for the balanced contrition of Wheatstone bridge

Posted by Raju Kumar 7 years, 1 month ago

CBSE > Class 12 > Physics

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Karan Kumar 7 years, 1 month ago

Now you should be use kircfs 2nd low and distribute current in condector of wheatstone brigde by taken resistance of galvanometer is equal to Zero then proved P/Q= R/S balanced condition of wheatstone bridge

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G K 7 years, 1 month ago

Kirchoff,'s law aaply kro..... eqn bnao..... Solve kro.....

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Amandeep Kumar 7 years, 1 month ago

P/Q = R/S

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What is eddy current

Posted by Mahonta Enghi 7 years, 1 month ago

CBSE > Class 12 > Physics

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Yogita Ingle 7 years, 1 month ago

Eddy currents are induced currents in the body of conductor when subjected to changing magnetic flux.
They are also known as Foucault current after the name of the scientist Foucault.
They are known as eddy currents as they are in the pattern of eddiesin the water.
Consider an electromagnet when attached to battery because of the current magnetic field will be produced which will induce current in the metallic plate.
The current will be in the form of eddies.
The metallic plate will be slightly drifted in the air because of eddy currents.

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Find u of an obj. Ofheight h fromco ncae

Posted by Sunaina Kushwaha 7 years, 2 months ago

CBSE > Class 12 > Physics