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Which mode of wave propagation is suitable of binding energy per nucleon. Explain using this graph,why heavy nuclei can undergo fission

Posted by Keerthana Kd 7 years, 2 months ago

CBSE > Class 12 > Physics

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What is electrostatic shielding ❓????????????????????

Posted by Yo Yo Honey Singh ? 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 7 years, 2 months ago

Electrostatic shielding is a phenomenon of isolating or blocking the external electric field inside a particular region (for eg: inside a car).
It’s better to stay inside a car when lightning occurs as it acts as a shield. Because the electric field inside the car is zero and the charge is distributed over its surface. So as long as you stay inside the car, you will be safe from lightning.

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Van-graaf generator is in our syllabus or not?

Posted by Mansi Gupta 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Mohammad Shazil 7 years, 2 months ago

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Explain the properties of electromagnetic waves..

Posted by Vikash Vishwal 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 7 years, 2 months ago

Electromagnetic waves are transverse in nature as they propagate by varying the electric and magnetic fields such that the two fields are perpendicular to each other.
Accelerated charges are responsible to produce electromagnetic waves.
Electromagnetic wave propagation it does not require any material medium to travel.
Electromagnetic wave follows the principle of superposition.
The light vector (also known as the electric vector) is reason for the optical effects due to an electromagnetic wave.

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What is rectification?

Posted by Vikash Vishwal 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Navya Singh 7 years, 2 months ago

The process of converting ac into dc is called rectification

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Difference between parallel and series capacitor?

Posted by Saurav Kumar 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Ankush Patel 7 years, 2 months ago

In series current flow through the capacitor in different region are same & in parallel voltage accross the capacitor are same

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All derivation

Posted by Savitri Ray 7 years, 2 months ago

CBSE > Class 12 > Physics

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Savitri Ray 7 years, 2 months ago

Means how many derivation in physics all chapter and write their name.?

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Yo Yo Honey Singh ? 7 years, 2 months ago

What do you mean by all derivation

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Practical s are not there

Posted by Pinu Pinu 7 years, 2 months ago

CBSE > Class 12 > Physics

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Can i get a list of important derivations..that is must to learn??!

Posted by Shangamithira Rani A 7 years, 2 months ago

CBSE > Class 12 > Physics

3 answers

Amandeep Kumar 7 years, 2 months ago

Not all derivations are important

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Yo Yo Honey Singh ? 7 years, 2 months ago

All derivations are important

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Navneet Kaur 7 years, 2 months ago

Main derivations are of electrostatics and magnetism and alternating current

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a body of mass 2 kg is projected at 20 m per second at an angle of 60 degree above the horizontal. power on the block due to the gravitational force at the highest point is...?

Posted by Aman Garg 7 years, 2 months ago

CBSE > Class 12 > Physics

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Red light however bright it is, cannot produce the emission of electron from a clean zinc surface . But even weak ultraviolet radiation can do so. Why? X-RAY of wavelength falls on photo sensitive surface. Assuming that the work function of the surface can be neglected. Prove that the de Broglie wavelength of electron emitted will be √h×wavelength/2me

Posted by Vaibhav Soni 7 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Vaibhav Soni 7 years, 2 months ago

But second part of the question

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Somya Duhan 7 years, 2 months ago

Electron emmision doesnot depend on intensity of light but on the frequency. As X ray have more frequency than red light so e emission takes place. I cant understand next part.

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How to remember derivations

Posted by Piyush Sati 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Yo Yo Honey Singh ? 7 years, 2 months ago

Derivation are not remembered they are understand first clear your concepts you will be able to understand all the derivations

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Formulae for V

Posted by Keerti Bk 7 years, 2 months ago

CBSE > Class 12 > Physics

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Chapterwise weightage of each chapter please ... of physics and maths pleases

Posted by Srivinayak V 7 years, 2 months ago

CBSE > Class 12 > Physics

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Why is Classical model of Rutherford for an atom of electron orbiting around the nucleus not able to explain atomic structure?

Posted by Navya Singh 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Nitin Yadav 7 years, 2 months ago

Because according to it, the electron revolving around the nucleus keeps in emitting energy in form of energy and follow spiral path. At some intant, it will fall into the nucleus which is not possible for any atom..

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What are the reasons of one side deflection errors in potentiometer

Posted by Vipul Jangra 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 7 years, 2 months ago

Deflection can be of various reasons:

A perfect constant voltage source is not available.
Measurement instrument is not accurate or its glitchy.
Potentiometer generally has a coil form (if they are large ones), it behaves as an inductor intially but after some time it will stabilize, if they have any AC component in the input (even slighly) they may give oscillations too.
if the Potentiometer is of metal/carbon film or other form than coil then the material properties are changing while passing the current. Like resistance is varying while there is a slight temperature change.

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What is the utility of half wave rectifier ? ( not uses )

Posted by Rohit Kumar 7 years, 2 months ago

CBSE > Class 12 > Physics

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What is the effect of increasing pH on K2 cr2 O7 solution

Posted by Aditya Singh 7 years, 2 months ago

CBSE > Class 12 > Physics

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Four charges are arranged at the corners of a square . What is the direction of the net Electrostatic force on the lower right charge?

Posted by Esha Shrivastava 7 years, 2 months ago

CBSE > Class 12 > Physics

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Any body from DPS RK PURAM HERE OR ANY OTHER SCHOOL OF DELHI OR ANY STUDENT FROM DELHI HERE PLEASE REPLY ME I WANT TO DO A MEETUP

Posted by Yo Yo Honey Singh ? 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Aditi Varshney 7 years, 2 months ago

Sry divyank.....kanpur aajaaoo??

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Come on ❗ Boys and Girls Answer Fastall questions are very very much important from examination point of you so please try to answer questions asked by me

Posted by Yo Yo Honey Singh ? 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Yo Yo Honey Singh ? 7 years, 2 months ago

? means VVVVV important Question More is rhe no of ? more is important question

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WhatsApp attraction between two point charges placed at a distance d is F.what distance apart should they be kept in the same medium so that force between them is F/3.

Posted by Yo Yo Honey Singh ? 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Yo Yo Honey Singh ? 7 years, 2 months ago

Sorry First word is not WhatsApp its force of attraction

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Use Gauss law to derive the expressionfor the electric field between two uniform charged parallel sheet with surface charge density plus sigma and minus sigma ?? [CBSE ALL INDIA 2009]

Posted by Yo Yo Honey Singh ? 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Saurabh Bhandary 7 years, 2 months ago

Read ncrt page no.1/83 &1/91

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Important questions in ray optics

Posted by Shubham Negi 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Shaima Ameen 7 years, 2 months ago

telescope,microscope,mirror equation, lens mker formula ,

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What is value of dip at equator and pole?

Posted by Abhishek Thakur 7 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Yogita Ingle 7 years, 2 months ago

Let us begin with the definition of magnetic dip.Magnetic dip or magnetic inclination at a place is defined as the angle which the direction of the total strength of the earth’s magnetic field makes with horizontal line in magnetic meridian . It is represented by the symbol δ Dip circle is the instrument used for measuring the value of magnetic dip.

At the magnetic north pole the needle will show 90 deg. (North points away from ground). At the magnetic south pole dip angle is - 90 deg. Needle's north points vertically down. At the magnetic equator, you will have the needle pointing horizontally. There is no vertical component. So dip angle is 0 deg.
As you move from the magnetic equator towards the magnetic pole, the angle increases in the northern hemisphere. In decreases in the southern hemisphere.

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Jayant Tehlan 7 years, 2 months ago

At equator angle of dip is zero. At pole angle of dip is 90

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Topics are removed from cbse 12

Posted by Devraj Pachhai 7 years, 2 months ago

CBSE > Class 12 > Physics