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N Aaditya 6 years, 10 months ago

In square law device the output voltage and current are directly proportional to the square of input voltage and current in an AC circuit.

ANSWER

Deduce the expression for the torque acting on a dipole of dipole moment placed in a uniform electric field E. Depict the direction of the torque. Express it in the vector form

Posted by Shubham Jain 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Derive the expression for PV^

Posted by Mohit Katiyar 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Derive an expression for the conductivity of a wire in terms of number density and relaxtion time. Hence obtain the relation between current density and the applied electric field E

Posted by Shashank Pandey 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Explain beta decay.

Posted by Harsh Tripathi 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years, 10 months ago

β Decay

There are two types of β decay , β- and β+
In β decay an nucleus decay spontaneously emitting an electron or positron
Under β- decay one of the neutrons in the parent nucleus gets transformed into a proton and in the process an electron and an antineutrino are emitted

ANSWER

Why we use reverse biasing in photodiode

Posted by Krishan Kumar 6 years, 10 months ago

CBSE > Class 12 > Physics

2 answers

Harsh Tripathi 6 years, 10 months ago

This reduce the response time because the additional reverse bias increase the width of depletion layer , which decrease the junction capacitance.

Khushboo Kumari 6 years, 10 months ago

Because it is easier to observe change in current with change in light intensity.

ANSWER

p-n junction - working in brief, diagram

Posted by Dipendra Kumar Sharma 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Why ionic conductivity is less than metallic conductivity

Posted by Muskan Raghuwanshi 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Shikhar Kandhway 6 years, 10 months ago

4Thank You

ANSWER

How to use symbols of micro or epsilon in this app while writing a question? Can we post pics of questions?? If yes then how?

Posted by Anish Chaubey 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is amplitude modulation??

Posted by Urvi Nagpal 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Gaurav Seth 6 years, 10 months ago

In amplitude modulation, the amplitude of the carrier wave is varied in accordance with the amplitude of the audio frequency modulating signal.
In this case, the frequency of the amplitude modulated wave remains the same as that of the carrier wave.

ANSWER

How is the questions level for cbse 2019

Posted by Sumit Kumar Arya 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Kartik Tiwari 6 years, 10 months ago

Not very hard question in 2019 paper

2Thank You

ANSWER

The sum of two positive charges is 5micro coloumb when they are placed at a distance of 1m they repel each other with a force of 54÷1000 N Find the magnitude of each charge (charges are placed in free space)

Posted by Anish Chaubey 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Cyclotron expression

Posted by Himanshu Rs 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Siddhant Gaurav 6 years, 10 months ago

1/2Dq^2b^2

ANSWER

Derive an expression for cyclotron frequency

Posted by Ashish Kumar 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Approx Weightage of derivations will be asked in 12th board exms

Posted by Namrata Mahi 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Nitika Neb 6 years, 10 months ago

Only 25 marks for theroy and 15 marks are of numericals and around 30 marks are for derivations

ANSWER

Transistor as an amplifier in common emmiter configuration

Posted by Durgesh Bunkar 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Explain gause law and prove it?

Posted by Pankaj Rawat 6 years, 10 months ago

CBSE > Class 12 > Physics

2 answers

Pankaj Rawat 6 years, 10 months ago

According to this law the total flux passing through any close surface is equal to the (1/epsilm not) time. the charge inclosed by that surface.

Sinchana Malagond 6 years, 10 months ago

A law relating to distribution of electric charge to resulting electric field. Proposed by Carl Freidrick Guass

ANSWER

Define noise

Posted by Naresh Sahu 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Kartik Tiwari 6 years, 10 months ago

The unwanted signal that disturb the transmission signal through the comminaction system.

ANSWER

Label diagram of transformer

Posted by Ashu Bagiyal 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Is nuclear reactor is in syllabus

Posted by Abc Kamboz 6 years, 10 months ago

CBSE > Class 12 > Physics

3 answers

Siddhant Gaurav 6 years, 10 months ago

Yes

Abc Kamboz 6 years, 10 months ago

Ye app ek dosro ki help ke liye the pata ni kaha sote h sare

Abc Kamboz 6 years, 10 months ago

Koi reply kyo ni karta

ANSWER

Unit of magnetic field

Posted by Ashish Roy 6 years, 10 months ago

CBSE > Class 12 > Physics

4 answers

Anish Chaubey 6 years, 10 months ago

Tesla

Sinchana Malagond 6 years, 10 months ago

Telsa(T)

2Thank You

Manish Yadav 6 years, 10 months ago

T or weber per metre2

Rishu Kumar 6 years, 10 months ago

Tesla(T)

ANSWER

Can I cover the whole syllabus in 10 days?

Posted by Ravi Singh 6 years, 10 months ago

CBSE > Class 12 > Physics

3 answers

Sinchana Malagond 6 years, 10 months ago

Heyy u can if u refer oswal question bank and also quick review bindaass you can cover whole of whole

Abc Kamboz 6 years, 10 months ago

Yes you can do it if you show determination

Ravi Singh 6 years, 10 months ago

If i have studied 3 chapters before then?

ANSWER

Can you tell me the important questions or topics related to the cbse 2019 exam of physics which have a chances to come the question on exam????

Posted by Deepu Singh Chohan 6 years, 10 months ago

CBSE > Class 12 > Physics

3 answers

Siddhant Gaurav 6 years, 10 months ago

Search important theory and derivations by aman dhattrawal on youtube aur search krne k baad us video k description m pdf ka link hoga uspr click karke dwnld krlena

Nitika Neb 6 years, 10 months ago

Follow latest sample paper which is available in this app

Pratham Singh 6 years, 10 months ago

Remember to do Wave optics