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

Since copper is a metal therefore resistance increases with increase in temperature nd germanium is a semiconductor therefore resistance decrease with increase in temperature. Thus,conductivity of copper will decrease nd tht of Ge will increase.

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Jin Kazama 8 years, 1 month ago

Abe sara gyan aaj hi lelega kya

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Three identical bar magnet s are diverted together at center in same plane as shown in figure. This system is placed at rest in a slowly varying magnetic field.it shows that system of magnets does not show any motion . Determine the poles of remaining two

Posted by Pragati Raj 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Jin Kazama 8 years, 1 month ago

Figure chori ho gaya kya ?!?!?!

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Kirchhoff law numerical

Posted by Gourav Tanwar 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Jin Kazama 8 years, 1 month ago

Ker le bada kam ka hai

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A charged particles enters the environment of a strong and non uniform magnetic field varying from point to point both in magnitude and direction and comes out of it following a complicated trajectory. Would it's final speed equal to final speed equal to the initial speed , if it suffered no collision with the environment?

Posted by Pragati Raj 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Komal Diksha 8 years, 1 month ago

Yes ,as kf is equal to ki for charged particle .

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Why do the electric field lines never cross each other

Posted by Sharad Tripathi 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Aparna Nair 8 years, 1 month ago

The tangent at any point in field lines gives the direction of the electric field. If two fields intersect, the tangent produced at the particular point may can tend to two... If an electric field has two directions then it may cancel each other or it's not possible

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Jin Kazama 8 years, 1 month ago

There will be 2 direction of forces which is impossible

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Derivation for coulomb law

Posted by Sangam Tripathi 8 years, 1 month ago

CBSE > Class 12 > Physics

5 answers

Aparna Nair 8 years, 1 month ago

I just said it on Google voice predictor... Only some was typed

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Jin Kazama 8 years, 1 month ago

Kasam se itna likhne ke liye to धरय chahiye ???

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Aparna Nair 8 years, 1 month ago

It states that force of attraction and repulsion between two charges is directly proportional to product of charges are inversely proportional to square of distance between them. F proportional to q1.q2 F proportional to 1/r^2 According to the law That is F proportional to q1.q2 /r^2 To remove the proportionality sign we substitute k which is equal to 1/4¶€°=k [ which is equal to 9×10^9 Nm^2 /C^2] AND €°=8.854×10^-19 That is F=1/4¶€° [ q1.q2 /r^2] If €r Is relative permittivity of a medium (in air value of €r is equal to 1) F=1/4¶€°€r [ q1.q2 /r^2] P. S: ¶=pi €°= Epsilon 0 €r= Epsilon r K= constant of proportionality And absolute permittivity in free space = to 1/4¶€°=k ☺️☺️☺️

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Jin Kazama 8 years, 1 month ago

Kabhi kabar book bhi pad leni chahiye

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Jin Kazama 8 years, 1 month ago

See in book

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Different example of total internal reflection?

Posted by Basil Babu 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Jin Kazama 8 years, 1 month ago

Not diamond but brilliance of diamond

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Vidhi Rawat 8 years, 1 month ago

Optical fiber, mirage, dimond

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What are isotopes and isobars magnet?

Posted by Prateek Tripathi 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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Difference b/w mutual and self induction?

Posted by Ashwani Sharma 8 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Ishu Chouhan 8 years, 1 month ago

Mutual induction : it is a phenomenon in which,when a current is passed through 1st coil , then mag.field produced around it but magnetic flux linked with coil 2 changes and emf is induced in 2 nd coil and vice versa

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Ishu Chouhan 8 years, 1 month ago

Self induction:-it is a property of a coil by virtue of which it delay in growth or decay of current due to change in magnetic flux linked with coil

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Garima Suyal 8 years, 1 month ago

Frdy LW pd

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Blue print of physics +2

Posted by Suman Bala 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Ishu Chouhan 8 years, 1 month ago

Search on internet

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Why the electric field inside a body is zero?

Posted by Abhi Kumar 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Komal Diksha 8 years, 1 month ago

Since source is zero which is charge.

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Types of potential energy

Posted by Twinkle Twinkle 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Komal Diksha 8 years, 1 month ago

Electrostatic potential energy.

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Twinkle Twinkle 8 years, 1 month ago

Gravitational potential energy Elastic potential energy

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Write the relationship between the size of a nucleus and its mass number?

Posted by Ashutosh Verma 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Akash Agarwal 8 years, 1 month ago

R=R A^(1/3) °

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What is a photon

Posted by Pankaj Sihag 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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Hii guys

Posted by Tanisha Dey 8 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Sai Thaini 8 years, 1 month ago

Hey

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Shivanshu Yadav 8 years, 1 month ago

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Jin Kazama 8 years, 1 month ago

Hello

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Graph between linear magnification and image distance of thin convex lens

Posted by Sreenitha Vinodkumar 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Jin Kazama 8 years, 1 month ago

Krpya sabhi ko ye bats de ki yha graph nhi banta hai

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What is mass of electron and proton for numericals of ch-dual nature of matter (in terms of m)

Posted by Dhruv Gupta 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Sharma Saabh 8 years, 1 month ago

Mass of electron-9.1*10^-31kg

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Two parallel uniformly charged infinite plane sheet first and second having charge densities +sigma and minus 2 sigma respectively find the magnitude and direction of electric field at between the seat and outside the sheets

Posted by Vibhuti Sinha 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Komal Diksha 8 years, 1 month ago

The direction of the field for plus sigma plane will b arrow showing field going towards the negative sigma plate.

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Guys! Please answer this. What is the direction of induced current in a circular loop if the induced emf is positive?

Posted by Sai Thaini 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Is value based question is removed from cbse board exam 12th class?

Posted by Shruti R 8 years, 1 month ago

CBSE > Class 12 > Physics

6 answers

Shruti R 8 years ago

Sahi h

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Jin Kazama 8 years, 1 month ago

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Silha Samuel 8 years, 1 month ago

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Sumit Saurya 8 years, 1 month ago

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Sai Thaini 8 years, 1 month ago

1Thank You

Garima Suyal 8 years, 1 month ago

Na yarrr vo kaha remove karingi,, ussei so to those uumeed hoti hi.

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Define amplitude modulation and illustrate it graphically

Posted by Pragna Roy 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Jin Kazama 8 years, 1 month ago

Sorry bro graph nhi banta hair yha

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How to pass

Posted by Abhisek Mishra 8 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Garima Suyal 8 years, 1 month ago

Pad k bhai

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Sumit Saurya 8 years, 1 month ago

Bajrangbali ka path kar karke

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Arya Thakur 8 years, 1 month ago

By study

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lens makers formula

Posted by Satyabrat Pandey 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Bhautik Agrawal 8 years, 1 month ago

1/f=(n21-1)[1/R1-1/R2] n21 is refractive index of medium 2 w.r.t. 1 R1 and R2 stands for radius of curvature of spherical glasses 1 and 2 respectively

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Rochie Joshi 8 years, 1 month ago

Bhaut bada h voooo

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