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

Read working of all devices like cyclotron and first cover short topics like communication and electronic devices Make sure that you have learned all working principles of devices like Wheatstone bridge

2Thank You

Aayisha Azeez 8 years, 1 month ago

Go through the main headings of each chapter.like cyclotron,Eddy current,etc

1Thank You

Bhanu Gohain 8 years, 1 month ago

Study from begining.. make a routine.. balance all subjects.. study chapters carrying more marks.. before exams dont study anything new.. revise.. 40+ easily

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Can this year physics paper is tough

Posted by Suraj Yadav 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Aayisha Azeez 8 years, 1 month ago

1Thank You

ANSWER

What's important in communication chptr

Posted by Abhishek Soni 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Priya Prakash S 8 years, 1 month ago

Block diagram

2Thank You

Shirin Kalam 8 years, 1 month ago

All block diagrams,definition,mode of transmission of waves

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prove coloums low by using gauss theorem

Posted by Deepasha Puri 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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What are coherent sources of light ??

Posted by Dheeraj Verma 8 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Radhika Tyagi 8 years, 1 month ago

Two sources having same phase and which emit monochromatic light

1Thank You

Aayisha Azeez 8 years, 1 month ago

The sources having same wavelength, same frequency and same phase

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Priya Prakash S 8 years, 1 month ago

They are source of light having same wavelength and same frequency.

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ANSWER

What is transparent?

Posted by Suryanarayan Raita 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Ankita Vats 8 years, 1 month ago

It depends upon refractive index.

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Namami Shukla 8 years, 1 month ago

A substance is called transparent if we can see clearly through it... Example glass

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What is a photo cell

Posted by Arzoo Rawat 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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Lorentz Force

Posted by Gaurav Singh 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Aayisha Azeez 8 years, 1 month ago

The force experience by a charged particle moving in space where the electric and magnetic field exist

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Principle of cyclotron

Posted by Priyu Pal 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Ankita Vats 8 years, 1 month ago

That the speed of a charged particle can be increased to a large value by making it to cross electric field and magnetic field repeatedly.

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Value of u0/4pie

Posted by Dilpreet Singh 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Jin Kazama 8 years, 1 month ago

10^(-7) is correct answer

2Thank You

Sunaina Malik 8 years, 1 month ago

4 × 10^7

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ANSWER

Basic idea of analog

Posted by Rahul Bisht 8 years, 1 month ago

CBSE > Class 12 > Physics

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Define the electric potential obtaine the expression for the electric potential at any point due to a point change.

Posted by Prem Karki 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Ankita Vats 8 years, 1 month ago

Expression= Considering a point charge +q We have to calculate it's potential at point P at a distance r from q. Potential will be equal to work done per unit test charge in bringing it from infinity to point P. Small work done A to B dw= Fdx cos 180 =-Fdx As F = kqq•/x2 dw=(-Kqq•/x2)dx After integrating we get V= Kq/r

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Ankita Vats 8 years, 1 month ago

The amount of work done in bringing a test charge from infinity to the given point against electrostatic force. Vb= W/q

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Send me the derivation for optical instruments

Posted by Aditya Navnage 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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In class 12 physic 1 chp important topic

Posted by Aman Sharma 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Aashish Kumar 8 years, 1 month ago

Gauss theorem , axial and equitorial dipole , conservation of charge , torque act on dipole .

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What are the topics that are ommitted of physics by cbse for class 12 board exam 2017-18

Posted by Namami Shukla 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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What is voltage regulator?

Posted by Mukesh Meshram 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Radhika Tyagi 8 years, 1 month ago

An instrument which regulates voltage in a circuit

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Two bulbs A and B are connected in series which have powers 100W and 500W respectively. Which of them produce higher intensity of brightnes?

Posted by Benedict Sabu 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Neha Garg 8 years, 1 month ago

100W as it will have less resistance

1Thank You

ANSWER

All physics derivation

Posted by Ananya Sandilya 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Mukesh Meshram 8 years, 1 month ago

Refer text book of physics

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How to identify para , dia,and ferro magnetic materials?

Posted by Aparna V Sunil 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Mukesh Meshram 8 years, 1 month ago

As per there permiability , susceptibility value

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What is skip distance

Posted by Sparsh Anand 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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graph of photoelectric current and voltage

Posted by Sparsh Anand 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Radhika Tyagi 8 years, 1 month ago

Yha graph ni bnta

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A cell of emf 4V amd internal resistance 1 ohm is connected to dc source of 10V through a resistor of 5 ohm calculate the terminal voltage across the cell during charging

Posted by Sonali Sangar 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Principal of AC generator

Posted by Sparsh Anand 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Yogesh Kadyan 8 years, 1 month ago

It works on the principle of electromagnetic induction i.e. when the flux linked with the circuit changes, current is induced in the circuit.

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What is positron

Posted by Sparsh Anand 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Neha Garg 8 years, 1 month ago

It is an antiparticle of electron

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Sourin Roy 8 years, 1 month ago

A positron is a charged particle with magnitude that equals that of electron but of positivee sign.The rest mass of a positron is 0 and it is emitted during beta(plus)decay of radioactive nuclei

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A charge of 500mc from 10 cm side of square opposite diagonally kept find work done in moving charge from centre

Posted by Sadik Najmi 8 years, 1 month ago

CBSE > Class 12 > Physics