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Principle of transformers

Posted by Sandeep Yadav 8 years, 1 month ago

CBSE > Class 12 > Physics

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Derivation for linear magnification in spherical mirrors

Posted by Saloni Khatavkar 8 years, 1 month ago

CBSE > Class 12 > Physics

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Investigatory project on transfarmar

Posted by Harshdeep Sarvar 8 years, 1 month ago

CBSE > Class 12 > Physics

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Important question of optics

Posted by Shivani Choudhary 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Sumit Gupta 8 years, 1 month ago

Polarisation

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Sumit Gupta 8 years, 1 month ago

Lens maker formula , compound microscope reflecting type telescope, brewster law, hygens principle

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1 electron equal to how many columb

Posted by Riya Rakhonde 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Kaushambi Shukla 8 years, 1 month ago

1.6 *10^(-19) C

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what is Area vector?

Posted by Debrat Bhattacharyya 8 years, 1 month ago

CBSE > Class 12 > Physics

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What is the minimum thrust required for plane flight

Posted by Arun Sharma 8 years, 1 month ago

CBSE > Class 12 > Physics

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Ohm,s law

Posted by Vikram Singh 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Kaushambi Shukla 8 years, 1 month ago

V=IR

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What is diamagnetism?

Posted by Ashita Naik 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Aashna Malick 8 years, 1 month ago

Diamagnetic substance r those which develop feeble magnetisation in the opposite direction of the magnetising field.nd such substances r feebly repelled by magnets nd tend to move from stronger to weaker parts of magnetising field... Examples:Bi,Cu,Zn etc

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What is position vector?

Posted by Punit Sharma 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Aman Jha 8 years, 1 month ago

A vector whose initial point is origin

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A source od AC emf.of 220V - 50Hz is conected in series with a resustance 200 ohm an inductance of 100 mH and capacitance of 30 micro farad .does the current lead or lag the voltage by what angle

Posted by Maheshchanra Dhange 8 years, 1 month ago

CBSE > Class 12 > Physics

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Difference between AC and D.C. transformer

Posted by Mesarka Rani Lakra 4 years, 6 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 4 years, 6 months ago

<th> <center>Alternating Current</center> </th> <th> <center>Direct Current</center> </th>

AC is safe to transfer longer distance even between two cities, and maintain the electric power.	DC cannot travel for a very long distance. It loses electric power.
The rotating magnets cause the change in direction of electric flow.	The steady magnetism makes DC flow in a single direction.
The frequency of AC is depended upon the country. But, generally, the frequency is 50 Hz or 60 Hz.	DC has no frequency of zero frequency.
In AC the flow of current changes its direction backwards periodically.	It flows in a single direction steadily.
Electrons in AC keep changing its directions – backward and forward	Electrons only move in one direction – that is forward.

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Difference between AC and DC

Posted by Mesarka Rani Lakra 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Sia ? 4 years, 6 months ago

Direct current (DC) is the flow of electric charge in only one direction. It is the steady state of a constant-voltage circuit. Alternating current (AC) is the flow of electric charge that periodically reverses direction.

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I want all important derivatives for board point of view

Posted by Jalesh Khatri 8 years, 1 month ago

CBSE > Class 12 > Physics

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What is the limitation of Bohr's model ?

Posted by Sachin Gupta 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Pradeep Rathi 8 years, 1 month ago

DEAR SACHINE LIMITATION 1:- THIS MODEL IS ONLY APPLICABLE TO HYDROGEN OR FOR Z=1 HENCE ITS FAIL FOR Z>1 2:- IT DOES NOT ABLE TO EXPLAIN THE FINE SPECTRUM LINES IN H-ATOM 3:- THIS MODEL DOES NOT EXPLAIN WHY ORBITS OF ELECTRON ARE TAKEN CIRCULAR WHEREAS ELLIPTICAL ORBITS ARE ALSO POSSIBLE

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Manganin is used for making standard resistors. Why?

Posted by Maharuck Rayeen 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Shivam Kaushal 8 years, 1 month ago

Because it has low temperature and high restivity

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What is momentum

Posted by Pankaj Verma 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Manyka Singh 8 years, 1 month ago

P=mv

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May I know how to divide a chapter to learn easily

Posted by Divya Bharathi 8 years, 1 month ago

CBSE > Class 12 > Physics

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How to solve numericals easily mns what is the strategy to solve numericals because i am weak in numerical part of physics

Posted by Shivam Kaushal 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Soumya Sakshi 8 years, 1 month ago

1.find out the topic to which the problem is related. 2.then analyse the question. 3.write down the given information. 4.apply proper formula. 5.put down the values 6.solve it. But above all be concentrated during solving numericals. Best of luck!!

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Define the transfer

Posted by Avnish Kumar 8 years, 1 month ago

CBSE > Class 12 > Physics

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What is impedence

Posted by Dimple Arora 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Soumya Sakshi 8 years, 1 month ago

It is the total resistance of l.c.r series circuit.

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Divya Bharathi 8 years, 1 month ago

It is the total resistance of a circuit applied in the path of alternating current

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Uuuuuuu

Posted by Shinzo Abe 8 years, 1 month ago

CBSE > Class 12 > Physics

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What is switch

Posted by Lipson Jacob 8 years, 1 month ago

CBSE > Class 12 > Physics

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Proove expression for torque

Posted by Priya Bhatt 8 years, 1 month ago

CBSE > Class 12 > Physics

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Ultraviolet light of wavelength 350nmand intensity 1W/m2is directed at potassium surface having work function 2.2eV.find maximum kinetic energy of photoelectron. If 0.5 percent of incident photon produce photoelectric effect,how many photoelectron per emitted from potassium surface that has area of 1cm2

Posted by Jashan Deep 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Prajwal Manojkumar Gawai 4 years, 5 months ago

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Ac generator

Posted by Yatendra Yadav 8 years, 1 month ago

CBSE > Class 12 > Physics

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Atoms full summary

Posted by Nagori Bilal 8 years, 1 month ago

CBSE > Class 12 > Physics

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Mutual induction

Posted by Bobby Sharma 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Divya Bharathi 8 years, 1 month ago

The phenomenon according to which an opposing emf is produced in a coil (i.e primary coil)as a result of change in current or magnetic flux Linked with a neighboring coil is called mutual induction

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