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

Two sources are said to be coherent if they emit radiation/light having same frequency and wavelength and the phase difference between them is either constant or zero

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define decay constant

Posted by Muskan Charan 8 years ago

CBSE > Class 12 > Physics

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How do we write 220 volte in equation

Posted by Manshi Rai 8 years ago

CBSE > Class 12 > Physics

1 answers

Yash Mangal 8 years ago

1st that is not volte its volt and it can be written like 220v in eq.

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A thin converging lens has focal length when illuminated by Booker colour state with reason how the focal length of the lens will change of violet light is replacedby red light

Posted by Raman Jeet 8 years ago

CBSE > Class 12 > Physics

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all derivation of magnetism chapter

Posted by Danish Sharma 8 years ago

CBSE > Class 12 > Physics

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What is diffrence between magnetic field lines and electric field lines

Posted by Nandika Sahni 8 years ago

CBSE > Class 12 > Physics

1 answers

Hemant Meena 8 years ago

Magnetic field lines are produced by moving charge and the electric field line are produced by static charge

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The magnitude field in a plane electromagnetic wave is given by: By=12×10^-8sin (1.20×10^7z+3.60×10^15t) T. Find the energy density.

Posted by Neha Pandey 8 years ago

CBSE > Class 12 > Physics

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Why electrostatic field at the surface of a charge conductors be perpendicular to every point on it?

Posted by Akshat Soni 8 years ago

CBSE > Class 12 > Physics

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Deduce an expression for the mutual inductance of two long co axial solenoids but having diff radii and diff no of turns.

Posted by Umang Pandey 8 years ago

CBSE > Class 12 > Physics

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Why width of depletion layer increases when doping Concentration decreases??

Posted by Shivani Maan 8 years ago

CBSE > Class 12 > Physics

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Can you please include viva questions of physics and chemistry preactical?

Posted by Bhavya Jain 8 years ago

CBSE > Class 12 > Physics

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Why potential energy of two like charges are not zero

Posted by Aniket Kumar 8 years ago

CBSE > Class 12 > Physics

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Full wave rectifier

Posted by Gurpreet Singh 8 years ago

CBSE > Class 12 > Physics

1 answers

Neha Gupta 8 years ago

Completely convert a.c into d.c

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What is clones

Posted by Kanhaiya Kanhaiya 8 years ago

CBSE > Class 12 > Physics

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Mansi Choudhary 8 years ago

Clone is a group of individuals of the same species that are morphologically and genetically similar

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Work function ????

Posted by Nisha Beniwal 8 years ago

CBSE > Class 12 > Physics

1 answers

Divyansh Mathur 8 years ago

the total energy required to eject the electron from the metal is called work function

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what is corona discharge?

Posted by Raj Gupta 8 years ago

CBSE > Class 12 > Physics

1 answers

Shruti R 8 years ago

It is a type of electric discharge due to ioisatio n of fluid surrounding an electically charged conductor

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The refractive index of water for red and violet colors are 1.325 and 1.334 respectively. Find the difference between the velocities of rays for these 2 color in water

Posted by Swapnil Rajput 4 years, 6 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 4 years, 6 months ago

RELATION BETWEEN REFRACTIVE INDEX AND VELOCITY.

R1/R2=V2/V1

1.325/1.334= V2/V1

0.99=V2/V1

V2= 0.99V1

DIFFERENCE= V1-V2

= V1-0.99 V1

= 0.01 V1.

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Kon kon se main topic h dual nature or atom and niclei chapter me se???? Plzz reply

Posted by Nisha Beniwal 8 years ago

CBSE > Class 12 > Physics

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why does current in a steady state not flow in a capaacitor connected across a battery?however momentary current does flow during charging or discharging of the capacitor.explain?

Posted by Amisha Mehandi Ratta 8 years ago

CBSE > Class 12 > Physics

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What is doping effect?

Posted by Shekhar Bhagat 8 years ago

CBSE > Class 12 > Physics

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Why n type semiconductor is electrically neutral

Posted by Muskaan Gugnani 8 years ago

CBSE > Class 12 > Physics

1 answers

Sahiba Bhayana 8 years ago

Because n - type semiconductor is formed by pentavalent atoms. since atom of the whole is electrically neutral. Hence n-type semiconductor is neutral.

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What is meant by mono chromatic source of light?

Posted by Rewangi Taragi 8 years ago

CBSE > Class 12 > Physics

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p-n-p transistor

Posted by Jyotish Kant 8 years ago

CBSE > Class 12 > Physics

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What is the difference between ray and wave optics

Posted by Aditya Gupta 8 years ago

CBSE > Class 12 > Physics

1 answers

Sia ? 4 years, 6 months ago

Ray optics is based on rectilinear propagation of light, and deals with mirrors, lenses, reflection, refraction, etc. Then you come to the chapter on wave optics, and you are told that light travels as a wave, that it can bend around objects, it can diffract and interfere, etc.

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