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A third polaroid is placed between P1 and P2 with its past Axis making an angle beta with the pass axis of p1. find the value of Beta for which the intensity of light from p2 is I'/8 ,where I' is the intensity of light on the Polaroid p1.

Posted by Gayatri Tantway 7 years ago

CBSE > Class 12 > Physics

2 answers

Kartik Periwal 7 years ago

Beta must be 45°

Aruneeraj K 7 years ago

The angle must be 90

ANSWER

Koi physics ki 1 & 2 unit k important topic bta do yrrrr plzzz

Posted by Sangeeta Nara 7 years ago

CBSE > Class 12 > Physics

2 answers

Sangeeta Nara 7 years ago

Sure usse alg kuch nhi aayega khin m uske alawa or kuch na pdhu or usse alg aa Jaye ?

Siddhant Gaurav 7 years ago

Are yara search most important derivation and theory by aman dhattarawal on YouTube description m Jake link p click krke pdf file download karke print krlena

ANSWER

Difference between potential and potential difference with an example

Posted by Ujjal Paul 4 years, 8 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 4 years, 8 months ago

The electrical potential difference is defined as the amount of work done to carrying a unit charge from one point to another in an electric field. In other words, the potential difference is defined as the difference in the electric potential of the two charged bodies. Unit: The unit of potential difference is volt.

ANSWER

Derive an expression for normal shift...on what factor it depends .

Posted by Anas Saifi 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Do electromagnetic waves carry momentum and energy

Posted by Ritesh Singh 7 years ago

CBSE > Class 12 > Physics

1 answers

Suhani Rana? 7 years ago

Yes, when an em wave travel through a medium its oscillating EF and MF vectors set the charges present in matter into oscillations.thus the charges acqire energy and momentum from the em wave which shows em wave carry energy and momentum.

ANSWER

Physics kids Tatar Kaisi Chal Rahi hai friend's...

Posted by Sãñjü Dïdêl 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Superposition principle in electric field intensity

Posted by Sãñjü Dïdêl 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is the overall weightage of numericals in boards?

Posted by Ishika Agarwal 7 years ago

CBSE > Class 12 > Physics

1 answers

A Jaiswal 7 years ago

15 marks

ANSWER

Given the mass of iron nucleus as 55.85u and A=56 find the nuclear density??

Posted by Sanket Mudholkar 7 years ago

CBSE > Class 12 > Physics

1 answers

Gaurav Seth 7 years ago

According to rutherford's relationsradius of nucleus = ro×A13 ro = constant = 1.2×10−15 m
therefore
r = 1.2×10−15 ×56−−√3
r = 4.59 ×10−15 m
also,
1u = 1.67×10−27 kg
55.85 u = 9.327 ×10−26 kg = mass of nucleus of iron atom
nuclear density = mass of nucleus of iron atomvolume of nucleus
nuclear density = 9.327 ×10−26 kg43π×r3 =9.327 ×10−26 kg43π×(4.59 ×10−15 )3
nuclear density = 4.851×1018 kg/m^3

ANSWER

We want to know the all position with diagram in the diffraction through one slit...

Posted by Ayush Srivastava 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Derivation of sharpness of resonance ncert pg. 249

Posted by Eishita Garg 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

how should i prepare electrostatics?

Posted by Vanshita S 7 years ago

CBSE > Class 12 > Physics

1 answers

Siddhant Gaurav 7 years ago

Agar time h toh search pradeep ksheterpal jaisal singh on YouTube and checkout playlist

ANSWER

numericals are of how many marks

Posted by Manjot Kaur 7 years ago

CBSE > Class 12 > Physics

1 answers

Kushav Garg 7 years ago

15

ANSWER

Gauss law nd its derivation

Posted by Kushav Garg 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

two mono chromatic radiations of frequencies v1 and v2 (v1>v2) and having thr same intensity are in turn incident on photosensitive material to cause ph. electric emmision...give reason in which no. of electrons will be emitted more

Posted by Sanya Bhatia 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Optics m mirror wala topic krne ki zaroorat h kya ??

Posted by Sangeeta Nara 7 years ago

CBSE > Class 12 > Physics

1 answers

Kushav Garg 7 years ago

No

ANSWER

Whai is pn junction

Posted by Rahul Jaiswal 7 years ago

CBSE > Class 12 > Physics

3 answers

Anjali Kalange 7 years ago

It is the junction formed when a p type and an n tpye semiconductor are fused.

A Jaiswal 7 years ago

It's a junction of two types of semiconductors Both are heavenly doped

Sangeeta Nara 7 years ago

P-n juctn is a boundary b/w two types of semiconductor i.e p type and n type

ANSWER

Pls can any one explain Q4.11 example physics (d) part ncert.....

Posted by Urvi Nagpal 7 years ago

CBSE > Class 12 > Physics

2 answers

Urvi Nagpal 7 years ago

Yes

A Jaiswal 7 years ago

Are you asking from ncert books;

ANSWER

Cbse question paper solution of year 2014 15

Posted by Aakansha Mishra 7 years ago

CBSE > Class 12 > Physics

1 answers

Aniket Jaiswal 7 years ago

Visit ncerthelp.com

ANSWER

Class 12 physics all derivation

Posted by Anshu Raj 7 years ago

CBSE > Class 12 > Physics

1 answers

Aman Khan 7 years ago

Visist aman dhattarwal channel on YouTube best h

ANSWER

Magnetic field due to a magnetic dipole derivation

Posted by Shaila Bano 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Syllabus and their topics in physics

Posted by Neetu Yadav 7 years ago

CBSE > Class 12 > Physics

1 answers

Aman Khan 7 years ago

Visit aman dhattarwal channel on youtube sab h usme important bhi orr chapter wise important derivations and numericals

ANSWER

electric feild at the centre of a dipole

Posted by Rishabh Singh 7 years ago

CBSE > Class 12 > Physics

1 answers

Rishabh Singh 7 years ago

twice time due to single charge

ANSWER

Does chromatic aberration is included in our syllabus ?

Posted by Joyita Pal 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

The law that gives the polarity of induced emf?

Posted by Harshitha Mallesh 7 years ago

CBSE > Class 12 > Physics

1 answers

Ayush Raj 7 years ago

Lenz law

ANSWER

Which formula is used for calculating emf and internal resistance in parallel for dissimilar cells.(is it kirchoff)please give example

Posted by Abhiraj Tiwari 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Who chapters ask Long questions in physics

Posted by Mo Danish 7 years ago

CBSE > Class 12 > Physics

1 answers

Aniket Jaiswal 7 years ago

1st, wave and ray,

ANSWER

State the condition in which terminal voltage across a cell is equal to its emf

Posted by Bharath Siva 7 years ago

CBSE > Class 12 > Physics

1 answers

Abhiraj Tiwari 7 years ago

When there is open circuit

ANSWER

An electron microscope uses electrons accelerated by a voltage of 50kv. Determine the de-Broglie wavelength associated with the electrons. Taking other factors such as numerical aperture etc to be the same, how does the resolving power of an electron microscope compare with that of an optical microscope which uses yellow light from a sodium lamp?

Posted by Amardeep Prasad 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Which is the most useful website to score good marks in cbse board exam 2019

Posted by Gagan Teja 7 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

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