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Sir/madam can u pls provide us with the blueprints being published by cbse everyear..so that we can have some idea about setting of question paper..pls rply soon bcoz i m presently in class 12 academic year 2017-18

Posted by Amritpal Singh 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Using appropraite ray diagramm obtain relation for refractive index of water in term of real and appearent depdht. Also explain sparkling of diamond

Posted by Ayush Shukla 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Salman Khan 8 years, 1 month ago

The brilliance of diamond is due to the total internal reflection. Refractive index of diamond is 2.42 whereas critical angle is 24.4°. Diamond is cut suitably so that light entering to diamond from any phase falls at an angle more than critical angle so that's why , it suffers multiple total internal reflection. Hence, it shines brilliantly.

Alia Khan 8 years, 1 month ago

I can't draw the ray diagram so you plz see in your book

ANSWER

Do we have to prepare ADDITIONAL EXERCISES questions for boards???

Posted by Divyansh Gupta 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Radhika Tyagi 8 years, 1 month ago

*if

Radhika Tyagi 8 years, 1 month ago

Yup of u hv completed NCERT

ANSWER

to show that that the energy of capacitors is always in loss during the shearing of capacitors.?

Posted by Aman Jha 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

hysteresis loss??

Posted by Satyam Sharma 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Shreya Shree 8 years, 1 month ago

Ac flowing through primary coil magnetises and demagnetises iron core .energy wasted in doing so is called hysteresis loss

ANSWER

Is GPS in syllabus??

Posted by Himanshu Jain 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Priya Prakash S 8 years, 1 month ago

No

Radhika Tyagi 8 years, 1 month ago

No

ANSWER

Is nuclear reactor in syllabus

Posted by Himanshu Jain 8 years, 1 month ago

CBSE > Class 12 > Physics

5 answers

Priya Prakash S 8 years, 1 month ago

No

Radhika Tyagi 8 years, 1 month ago

No

Ritu Gupta 8 years, 1 month ago

Yes it is

Muskaan Gugnani 8 years, 1 month ago

No it's not in our syllabus

Virangna Roy 8 years, 1 month ago

Yes

ANSWER

How does transistor work as oscillator ??

Posted by Rashmi Shrivastava 8 years, 1 month ago

CBSE > Class 12 > Physics

5 answers

Jass Mangla 8 years, 1 month ago

Not mentioned in syllabus

Mohammad Anas 8 years, 1 month ago

Its in the syllabus....its works throught magnetic coupling which helps in forward biasing whic increase the curent in the circuit once the cureent reaches to the peak value no change in magnetic flux takes place so now the capacitor dischage and support on forward biasing dec which dec the cureent and now magnetic flux induced in opposite cycle which more reduces the support and hence current dec ...this cycle follows upto peak to zero value of current..

Priya Prakash S 8 years, 1 month ago

Not in syllabus

Aman Jha 8 years, 1 month ago

It's not important for 2018 exam.may be

Himanshu Jain 8 years, 1 month ago

Its not in syllabus..

ANSWER

What is vector

Posted by Rahul Jhonston 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Aman Jha 8 years, 1 month ago

It has magnitude as well as direction also.

ANSWER

Heyy friends how many of you are still awake and studying which subject? ??

Posted by Ok Ok 8 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Vinayak Jaiswal 8 years, 1 month ago

??

Aman Jha 8 years, 1 month ago

Physics...

Yuthika Yadav 8 years, 1 month ago

????

ANSWER

Is the derivation of quality factor in terms of band width in syllabus?

Posted by Mansi Goyal 8 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Mansi Goyal 8 years ago

But some teachers are saying that it's in syllabus What to do?

Aman Jha 8 years, 1 month ago

No

Aman Primium Pandey 8 years, 1 month ago

no

ANSWER

How does the angle of minimum deviation of a glass prism vary if the incident violet light is replaced with red light

Posted by Ravi Kumar 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Aman Jha 8 years, 1 month ago

Angle of minimum deviation of a glass prism decreased because , violet light is maximum deviated and red light minimum deviation then violet light.

Aman Primium Pandey 8 years, 1 month ago

angle of minimum deviation would decrease as it is inversely proportional to wavelength of light.

ANSWER

why radio waves has short wave band?

Posted by Aman Primium Pandey 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Abc Arora 8 years, 1 month ago

Radiowaves that are used for sky wave propagation form short wave band

ANSWER

Are all additional exercises copulsory

Posted by Abcd Abcd 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Priya Prakash S 8 years, 1 month ago

No

ANSWER

Is Nuclear reactors there in the portion?

Posted by Aravind S Lal 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Radhika Tyagi 8 years, 1 month ago

No

Abcd Abcd 8 years, 1 month ago

Yaeh

ANSWER

How does the trasistor works as an amplifer?

Posted by Aravind S Lal 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Rashmi Shrivastava 8 years, 1 month ago

Ac current is applied in input circuit. base current changes collector current.due to which output voltage changes

ANSWER

Doppler effect syllabus me h kya

Posted by Abhishek Soni 8 years, 1 month ago

CBSE > Class 12 > Physics

4 answers

Abcd Abcd 8 years, 1 month ago

It's in wave optics

Yuthika Yadav 8 years, 1 month ago

No

Abhishek Soni 8 years, 1 month ago

Of light?

Yuthika Yadav 8 years, 1 month ago

Haa lekin 11th ke mein??

ANSWER

why photodiode operated in reverse bias mode

Posted by Arya Thakur 8 years, 1 month ago

CBSE > Class 12 > Physics

4 answers

Mohammad Anas 8 years, 1 month ago

First of all our purpose is to get current from the light not from the diode so we use it reverse biasing as we want that radiation produces current .....now the radiation energy is convertd in form of light..

Arya Thakur 8 years, 1 month ago

Thanx

Siddharth Jain 8 years, 1 month ago

This show very low current

Fauzan Arshad 8 years, 1 month ago

Because photocurrent increases linearly with increase in intensity of light

ANSWER

Wave optics kase padhna chya

Posted by Tanu Sharma Sharma 8 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Tanu Sharma Sharma 8 years, 1 month ago

Thanks

Sudeepak Soni 8 years, 1 month ago

Do all the imp. topics Do some previous year's papers

Radhika Tyagi 8 years, 1 month ago

Dhyan se

ANSWER

Wave optics kase padhna karna chaya

Posted by Tanu Sharma Sharma 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Derive an expression for the electrostatic potential energy of a system of point charges

Posted by Sudeepak Soni 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What r Foucault current? How can be they minimised?

Posted by Akshay Singh 8 years, 1 month ago

CBSE > Class 12 > Physics

7 answers

Radhika Tyagi 8 years, 1 month ago

Wlcm?

Yuthika Yadav 8 years, 1 month ago

Thanks

Radhika Tyagi 8 years, 1 month ago

They r one or the same thing

Radhika Tyagi 8 years, 1 month ago

Yup

Yuthika Yadav 8 years, 1 month ago

Ayushi are these Eddy currents??

Radhika Tyagi 8 years, 1 month ago

It can be minimized by lubrication or by cutting the slot

Radhika Tyagi 8 years, 1 month ago

A swirling current produced in the bulk of the conductor when magnetic flux linked with it changes

ANSWER

Solving 10 yrs and NCERT questions is sufficient to score good??

Posted by Swati Singh 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Benedict Sabu 8 years, 1 month ago

Very much

Pranjali Mahajan 8 years, 1 month ago

Yup

ANSWER

Will someone explain electrostatic shielding ..???

Posted by Alfin James 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Abc Arora 8 years, 1 month ago

When a charge is placed in a hollow spherical body/shell, the electric field experienced by it is zero. This process of protecting the charged body from external electric field by placing it inside a hollow body is called electrostatic shielding.

ANSWER

Capacity of numericals in physics exam

Posted by Saurabh Pandey 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Radhika Tyagi 8 years, 1 month ago

16 marks i guess

ANSWER

What does 'continuous spectrum' mean ?

Posted by Benedict Sabu 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Sudeepak Soni 8 years, 1 month ago

An emission spectrum that consists of a continuum of wavelengths.(Emission spectrum is a spectrum of the electromagnetic radiation emitted by a source)

ANSWER

Plane em waves are ??? As i Refer it may be transverse but this app shows longitudinal is correct option!

Posted by Sourabh Yadav 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Important concept in electromagnetic induction

Posted by Zyxw Abcd 8 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Aman Jha 8 years, 1 month ago

Mutual inductance and derivation also and Eddy current are the most important topic.

Shobhitha Shetty 8 years, 1 month ago

magnetic flux faradays law lenz law &significance motional emf expression of motional electro motiveforce eddy currents&application inductance derivatn

Benedict Sabu 8 years, 1 month ago

Mutual & self induction.

ANSWER

What is the base of class 12 Physics paper?

Posted by Lokesh Gupta 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Lakshay Saxena 8 years, 1 month ago

1 n 2 marks questions are hard, 3 marks questions are logical and formula base , and 5 marks questions are derivation

ANSWER

Is Doppler effect of light important????

Posted by Abhishek Soni 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Abhishek Soni 8 years, 1 month ago

Is it in the syllabus?

Radhika Tyagi 8 years, 1 month ago

Na

ANSWER

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