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 7 years, 10 months 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 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Jin Kazama 7 years, 10 months ago

Figure chori ho gaya kya ?!?!?!

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Kirchhoff law numerical

Posted by Gourav Tanwar 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Jin Kazama 7 years, 10 months 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 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Komal Diksha 7 years, 10 months 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 7 years, 10 months ago

CBSE > Class 12 > Physics

2 answers

Aparna Nair 7 years, 10 months 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 7 years, 10 months ago

There will be 2 direction of forces which is impossible

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Derivation for coulomb law

Posted by Sangam Tripathi 7 years, 10 months ago

CBSE > Class 12 > Physics

5 answers

Aparna Nair 7 years, 10 months ago

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

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Jin Kazama 7 years, 10 months ago

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

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Aparna Nair 7 years, 10 months 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 7 years, 10 months ago

Kabhi kabar book bhi pad leni chahiye

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Jin Kazama 7 years, 10 months ago

See in book

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Different example of total internal reflection?

Posted by Basil Babu 7 years, 10 months ago

CBSE > Class 12 > Physics

2 answers

Jin Kazama 7 years, 10 months ago

Not diamond but brilliance of diamond

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Vidhi Rawat 7 years, 10 months ago

Optical fiber, mirage, dimond

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What are isotopes and isobars magnet?

Posted by Prateek Tripathi 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

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Difference b/w mutual and self induction?

Posted by Ashwani Sharma 7 years, 10 months ago

CBSE > Class 12 > Physics

3 answers

Ishu Chouhan 7 years, 10 months 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 7 years, 10 months 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 7 years, 10 months ago

Frdy LW pd

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Blue print of physics +2

Posted by Suman Bala 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Ishu Chouhan 7 years, 10 months ago

Search on internet

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Why the electric field inside a body is zero?

Posted by Abhi Kumar 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Komal Diksha 7 years, 10 months ago

Since source is zero which is charge.

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Types of potential energy

Posted by Twinkle Twinkle 7 years, 10 months ago

CBSE > Class 12 > Physics

2 answers

Komal Diksha 7 years, 10 months ago

Electrostatic potential energy.

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Twinkle Twinkle 7 years, 10 months 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 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Akash Agarwal 7 years, 10 months ago

R=R A^(1/3) °

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What is a photon

Posted by Pankaj Sihag 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

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Hii guys

Posted by Tanisha Dey 7 years, 10 months ago

CBSE > Class 12 > Physics

3 answers

Sai Thaini 7 years, 10 months ago

Hey

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Shivanshu Yadav 7 years, 10 months ago

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Jin Kazama 7 years, 10 months ago

Hello

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Graph between linear magnification and image distance of thin convex lens

Posted by Sreenitha Vinodkumar 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Jin Kazama 7 years, 10 months 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 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Sharma Saabh 7 years, 10 months 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 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Komal Diksha 7 years, 10 months 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 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

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

Posted by Shruti R 7 years, 10 months ago

CBSE > Class 12 > Physics

6 answers

Shruti R 7 years, 9 months ago

Sahi h

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Jin Kazama 7 years, 10 months ago

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Silha Samuel 7 years, 10 months ago

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Sumit Saurya 7 years, 10 months ago

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Sai Thaini 7 years, 10 months ago

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Garima Suyal 7 years, 10 months 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 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Jin Kazama 7 years, 10 months ago

Sorry bro graph nhi banta hair yha

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How to pass

Posted by Abhisek Mishra 7 years, 10 months ago

CBSE > Class 12 > Physics

3 answers

Garima Suyal 7 years, 10 months ago

Pad k bhai

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Sumit Saurya 7 years, 10 months ago

Bajrangbali ka path kar karke

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Arya Thakur 7 years, 10 months ago

By study

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lens makers formula

Posted by Satyabrat Pandey 7 years, 10 months ago

CBSE > Class 12 > Physics

2 answers

Bhautik Agrawal 7 years, 10 months 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 7 years, 10 months ago

Bhaut bada h voooo

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