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

Coloumb’s law has the following two limitations:
The charges should be point charges i.e the charges are placed at a point which have no dimensions
The second limitation is the distance between the two charges remains constant.

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why wires on poles are naked

Posted by Danish Khan 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Rahul Rawat 6 years, 10 months ago

if they are close then no pass of electricity will take place

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What is the phase difference between electric and magnetic field vector in an em-wave

Posted by Riyanshi Trivedi 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Saket Kumar Suman 6 years, 10 months ago

π/2 phase difference in an emf wave

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Who is here from fiitjee..

Posted by Shubham Kumar Gupta 6 years, 10 months ago

CBSE > Class 12 > Physics

3 answers

Shubham Kumar Gupta 6 years, 10 months ago

I am from fiitjee patna..

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Kumar Vishal Behera 6 years, 10 months ago

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Kumar Vishal Behera 6 years, 10 months ago

Me from fiitjee bhubaneswar

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The number of electron that must be removed from an electrically neutral silver dollar to give it a charge of +2.4 C.

Posted by S Raj 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

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Why unit positive charge is brought to detect electric field not negative charge

Posted by Sagar Kumar 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Chetan Singh 6 years, 10 months ago

We can take any charge but we need to make sure both the charges are same

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Apply gauss law to show that for a charged spherical shell, the electric field outside the shell, as if the entire charge were concentrated at the centre

Posted by Kamlesh Joshi 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

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Two equal Balls having equal positive charge q coulombs are suspended by two insulating Strings of equal length. What would be the effect on the force when a plastic sheet is inserted between the two?

Posted by Sneha Sarkar 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

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Do Xam idea reference for physics is good more than ncert..

Posted by Priya # 6 years, 11 months ago

CBSE > Class 12 > Physics

3 answers

ब्राहम्ण Boy 6 years, 11 months ago

You can use together with also by Rachna Sagar that is also pretty useful

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Shreya Gautam Gautam 6 years, 11 months ago

No xam idea is not recommended ncert is best and oswaal sample papers are good

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Ritik Ranjan 6 years, 11 months ago

Both are good

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Determine the electric field at a point at distance r from a linearly charge body of length l.the linear charge density of the body is lamda. With video explaining

Posted by T.S Vinayak 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

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Can anyone tell me that to go through with NCERT....means to read the chapters line to line ...only...????

Posted by Ram Ditta 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Aman Kumar 6 years, 11 months ago

Not exactly....it means to clear ur concept clearly

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The charges each of magnitude +q are placed at a fixed distance L apart. A charge +Q and mass m in play at midpoint of the line joining the charges. Charge +Q displaces slightly along the line joining charges and release to perform SHM then it is time period of oscillation is equal to

Posted by Areeba Qazi 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

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Electric dipole for point on the axis

Posted by Harsh Choudhary 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

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In exercise 1.5 if we short the 2nd distance 1cm then what will be the answer i.e 4cm

Posted by Nirbhay Singh 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

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What is GLE?

Posted by Ekansh Singh 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Sonam Malik 6 years, 10 months ago

Gold Leaf Electroscope

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Packing fraction

Posted by Abhi Kumar 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years, 11 months ago

Packing faction or Packing efficiency is the percentage of total space filled by the particles.

Both hcp & ccp though different in form are equally efficient. They occupy the maximum possible space which is about 74% of the available volume. Hence they are called closest packing.
Packing Efficiency ={tex} \frac{Volume\ occupied\ by\ all\ the\ spheres\ in \ unit\ cell}{Total\ volume\ of\ the\ unit\ cell}\times 100{/tex}

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Why the dielectric strength of a conductor is infinite?

Posted by Kapri Sub 6 years, 11 months ago

CBSE > Class 12 > Physics