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What is the momentum of a photon of energy 1mev

Posted by Ashrafa Rahman 7 years, 4 months ago

1 answers

Nikita Kumari 7 years, 4 months ago

Energy of a photon E=hc/lemda=hc/(h/p) lemda=h/p =pc P=e/c P=10to the power 6 ×1.6×10 to the power -19/(3×10to the power 8)kgm/s P=5×10to the power -22kg/s

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ANSWER

Columb law

Posted by Saurabh Giri 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Megha Dumka 7 years, 4 months ago

It states that the relation between electrostatic force and the charge is knwn as coulumbs law

2Thank You

ANSWER

What is electric flux?its SI unit? Show that electric flux is independent from the shape and size of the close surface

Posted by Aditi Srivastava 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is superposition principle

Posted by Navneet Kumat 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Anonymous A 7 years, 4 months ago

Total forces acting on a charge due to no. Of charge is the vector sum of individual forces acting on that charge due to all the charges F= F1 + F 2+ F3 +.............

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What is the unit of permittivity of free space

Posted by Deep Gill 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Aryan . 7 years, 4 months ago

Newton inverse metre square inverse coulomb square

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What is the cause of big bang??

Posted by Ajay Jain 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Aman Chhillar 7 years, 4 months ago

Good question

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ANSWER

What is the meaning of dielectric medium

Posted by Laxminarayan Narayan 7 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Saloni S 7 years, 4 months ago

Dielectric constant is defined as theratio of absolute permittivity of the medium to the absolute permitivty of free space.

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Manish Kumar 7 years, 4 months ago

Having semiconduction of electricity

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Short note on working of van de graaff electrostatic generator

Posted by Navdeep Kaur 7 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Princesses Kaur 7 years, 4 months ago

It's a machine to build high voltage of order few million volts resulting in electric field is used to accelerate the change particle which are used in nucler rxn

1Thank You

Septima Ravenclaw 7 years, 4 months ago

It isnt in our syllabus

1Thank You

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Two particles A and B having charges of 2 in 2 microcoulomb and minus 4 microcoulomb respectively RR held fixed at a separation of 20 CM locate the points online SBI where the electric charge is zero

Posted by Rahul Maurya 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Van de graaff eletrostatic generator

Posted by Navdeep Kaur 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Sakshi Tomar 7 years, 4 months ago

It is based on corona discharge

5Thank You

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Earth is equipotential surface define

Posted by Manveer Singh 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Jin Kazama 7 years, 4 months ago

There are dry areas where charge can build up (e.g compare a desert to a lake). And there are surface current-flows (e.g. during lightning where charge moves to/from the surface). So it is not an equipotential surface. But for some purposes (e.g. calculations involving the distribution of charged particles in the earth's magnetic field in outer space) it would be accurate enough to treat the earth's surface as an equipotential. ???

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What is the inverse of ohm it is mho .belive this is tri3

Posted by Lovely Pal 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Rishabh Sahu 7 years, 4 months ago

Oh-m resistance mho -conductance resistance =1/ conductance . therefore the units are inverse of each other.

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What is guass law

Posted by Priyanshu Jaiswal 7 years, 4 months ago

CBSE > Class 12 > Physics

3 answers

Ajay Jain 7 years, 4 months ago

The total electric flux throw a closed surface inclosing a charge is equal to 1/€o charge +ve charge

1Thank You

Amreen Fatma 7 years, 4 months ago

It states that total electric flux through a closed surface is equal to 1/€° times the magnitude of charge , where €° is permittivity of free space !!!!!!

5Thank You

Payal Verma 7 years, 4 months ago

It is the total pf the electric flux out of a closed surface is equal to the charge enclosed by tje permittivity.

1Thank You

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What is resistance. ?

Posted by Deep Gill 7 years, 4 months ago

CBSE > Class 12 > Physics

9 answers

Sakshi Tomar 7 years, 4 months ago

Obstruction in flow of current

1Thank You

Princesses Kaur 7 years, 4 months ago

0Thank You

Jin Kazama 7 years, 4 months ago

Kya bat hai kabhi current khake nhi dekha kya ???

0Thank You

Princesses Kaur 7 years, 4 months ago

1Thank You

Princesses Kaur 7 years, 4 months ago

Which oppose the flow of current

1Thank You

Deep Gill 7 years, 4 months ago

Thanks to all of you

0Thank You

Lovely Pal 7 years, 4 months ago

The hindrence produce in the flow of current called resistance

2Thank You

Payal Verma 7 years, 4 months ago

It is the opposition that a substance offers to flow of electric current.

3Thank You

Priyanka Aggarwal 7 years, 4 months ago

It is the measure of difficulty face by a conductor to pass an electric current

3Thank You

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Two idependent light sources such as two bulbs or two candles cannot produce sustain interference patter because the face difference between the light waves initiated by such sources does not remain study where difference is not constant but varies with time continuously. Therefore at any point on the screen the intensity of light also varies continuously. Hence at the same point there is intense light at one instant and darkness at other instant

Posted by Simran Yadav 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Find the electric field intensity due to a spherical charged conductor

Posted by Mona Tamoliya 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

If we increase the resistance of resistance box then null point will shift towards which point.

Posted by Nandini Attri 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Two infinitely long parallel planes have uniform charge density sigma 01 and sigma 02. Determine the electrich field point: 1. Left to the sheet 2.Right to the sheet 3.Between the sheets

Posted by Raj Devnani 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Saloni S 7 years, 4 months ago

1) E(left) = E1+E2 = sigma1/2€not +sigma2/2€not towards -ve X axis 2)same as left but direction is towards +veXaxis 3)E(between the sheet)=E1-E2 =sima1-sigma2 /2

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Millions and billions of electron in a coin repel each other. Why don't they fly out?

Posted by Payal Verma 7 years, 4 months ago

CBSE > Class 12 > Physics

5 answers

Jin Kazama 7 years, 4 months ago

Their is a strong nuclear force which dominates over electrostatics force ???

1Thank You

Lovely Pal 7 years, 4 months ago

You are taking elctrostatic force very lightly it is 36 times stronger than gravitation force

1Thank You

Payal Verma 7 years, 4 months ago

Thnx

0Thank You

Ambar Mallick 7 years, 4 months ago

Because of high surface energy electron cannot escape from it.

1Thank You

Arathy S 7 years, 4 months ago

Good question

4Thank You

ANSWER

What is the expression for field strength on axial line?

Posted by Payal Verma 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Ambar Mallick 7 years, 4 months ago

2kpx/(x^2-a^2)^2

1Thank You

ANSWER

How black whole is formed

Posted by Ajay Jain 7 years, 4 months ago

CBSE > Class 12 > Physics

4 answers

Jin Kazama 7 years, 4 months ago

And that star become super nova(nearest orbital vanguard alliance ???)

0Thank You

Jin Kazama 7 years, 4 months ago

A star fuse hydrogen into hellium , hillium into carbon and so on and release gamma radiation which balance inwards and outwards pressure. It work as fuel for star. At end it consist of only iron which release no radiation on fusing so outwards force finished and inwards pressure work , which collapse entire mass of that star into small space. Large mass and small volume so its gravity become too much.???

0Thank You

Ambar Mallick 7 years, 4 months ago

They all are formed by big bang

1Thank You

Payal Verma 7 years, 4 months ago

Black holes are formed when tje centre of a big star collapse.

3Thank You

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What is the velocity of ligh

Posted by Harsh Mehta 5 years, 5 months ago

CBSE > Class 12 > Physics

3 answers

Jin Kazama 7 years, 4 months ago

Eske bavjud black hole se nhi bach sakti ??????

0Thank You

Jin Kazama 7 years, 4 months ago

?????????

0Thank You

Mayank Raghuvanshi 7 years, 4 months ago

3*10^8 m/s

2Thank You

ANSWER

Is there any relationship between electric field and electric current

Posted by Samar Singhai 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Lovely Pal 7 years, 4 months ago

No not at all possible because eletrical feild is associated with statical condition of charge. Where as electric current is a associated with charge in motion hence both belongs to diffrent branch of science so no relation is significant.

1Thank You

ANSWER

a 10 v battery with internal resistance 1 ohm and 15 v battery with internal resistance 0.6 ohm are connected in parallel to a voltmeter.the reading in voltmeter is

Posted by Praveen Kumar Senthil 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Two charges of -2Q and +Q are loaded at points a,0 and 4a,0 resp.what is the electric flux due to these charges through a sphere of radius 3a with its centre at the origin ???

Posted by Ganesan Chandanapriya 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Rishabh Sahu 7 years, 4 months ago

Gauss law- Net flux through a body is equal to q(enclosed )/ ε . Here q enclosed is only -2 Q and other charge is outside sphere so flux Ψ=2Q/ ε

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Force between proton and neutron ????? Proton have positive charge but neutron so not have any charge

Posted by Varun Rao 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Rishabh Sahu 7 years, 4 months ago

Gravitational , nuclear forces( that which is the cause of binding energy)

1Thank You

ANSWER

Who discovered charge?what are smallest and biggest unit of charge?

Posted by Arpit Saini 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Rhitika Rai 7 years, 4 months ago

smallest unit is franklin biggest unit is faradey

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ANSWER

Best physics book for class 12

Posted by Ayush Pandey 7 years, 4 months ago

CBSE > Class 12 > Physics

5 answers

Himan Talukdar 7 years, 4 months ago

Sl arora for board

0Thank You

Swati Singh 7 years, 4 months ago

s l arora and hc verma

1Thank You

Mansee Saini 7 years, 4 months ago

Ncert books is best

0Thank You

Shagun Kamboj 7 years, 4 months ago

One more book for comptetion is DC pandey

0Thank You

Nitin Tripathi 7 years, 4 months ago

Pradeep.... For competition HC verma

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Give uses of concave mirror

Posted by Harsh Sekhon 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Aek Aek 7 years, 4 months ago

Hi harsh Concave mirrors due to their shape and reflecting surface, have a wide range of applications in different areas 1)it is used by dentists to watch tooth related aspects 2) the reflectors of table lamp are concave 3) shaving mirrors are made slightly concave 4) sun rays are focused at foci (solar cookers) 5) it is used in wide range of telescopes

1Thank You

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What is the difference between discrete nd continuous of charges

Posted by Prabh Sandhu 7 years, 4 months ago

CBSE > Class 12 > Physics