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when a two atom contact to each other and in both atom electron in an motion thatswhy its E.F will disturb and new level were create known as energy band

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Kapil Singh Solanki 8 years, 1 month ago

beca

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Chinmay Nanda 8 years, 1 month ago

There are two types of energy bands valence band and conduction band

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Why sky wave is suitable for long distance communication ? ??????

Posted by Aditya Singh 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Abcd Abcd 8 years, 1 month ago

Bcoz transmission .can occur without any significant energy loss

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Potential gradient

Posted by Kshitij Sahuji 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Sajal Joshi 8 years, 1 month ago

Change in the potential difference across a circuit per unit length.E= -dV/dL

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Define modulation index?

Posted by Akshat Sharma 8 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Decent Sharma 8 years, 1 month ago

Modulation index =Amplitude of message signal ÷Amplitude of carrier signal

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Ravi Kumar 8 years, 1 month ago

Ratio of modulation wave / carrier wave U= Am/Aç

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Nimisha Varshney 8 years, 1 month ago

Em/Ec

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Ncert example 1.7

Posted by Dream Boy 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Kelvin Antony 6 years, 5 months ago

In ex 1.7 why |F3| = 3^1/2 F is because the angle between the vectors is 60 deg and using parallelogram law of vector addition F3 = (F^2 + F^2 - 2FFCos 60)^1/2
F3 = (F^2 + F^2- 2xF^2x 1/2)^1/2
F3 = (F^2 + F^2 + F^2)^1/2
F3 =( 3F^2)^1/2
F3 = 3^1/2 F

In case of the other vector additions giving the resultant forces F1 and F2, the angle is 120 deg and cos 120 = -1/2.

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Radhika Tyagi 8 years, 1 month ago

Which chapter??

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In the figure A is a point infront of coil

Posted by Dream Boy 8 years, 1 month ago

CBSE > Class 12 > Physics

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if an electrically charged rod is brought near normal flow of water from a tap the flow gets slightly diverted towards the rod why?

Posted by Jin Kazama 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Jin Kazama 8 years, 1 month ago

you mean +ve and -ve both

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Chinmay Nanda 8 years, 1 month ago

This is because the tap water consists of some ions which has opposite charge to that of the charged rod

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Transistor as a switch omit h ky

Posted by Hina Siddiqui 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Radhika Tyagi 8 years, 1 month ago

Yes

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Prabhjot Guraya 8 years, 1 month ago

Given in ncert

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What is side band?

Posted by Yasir Khan 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Prabhjot Guraya 8 years, 1 month ago

Open pardeeps book

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What is the relevance of large value of k (=81) for water

Posted by Jin Kazama 8 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Ravi Kumar 8 years, 1 month ago

Because it has more intermolecular hydrogen bonding

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Astha Srivastava 8 years, 1 month ago

because binding force of attraction between oppositely charged ions of the substance in water becomes 1/81 of the force between these ions in air.

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Astha Srivastava 8 years, 1 month ago

It make water a better solvent.

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What is difference between diffraction minimas and diffraction maximas?

Posted by Sai Kanval 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Chinmay Nanda 8 years, 1 month ago

Diffraction maxima has large intensity of light whereas diffraction minima has small intensity

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Jin Kazama 8 years, 1 month ago

maxima is portion of high intensity region and minima is portion of dark region

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Can electrostatics play any role in Xerox copying machine? Explain your answer.

Posted by Astha Srivastava 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Jin Kazama 8 years, 1 month ago

Pradeep me

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Jin Kazama 8 years, 1 month ago

book me pura detail me hai

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What is the path difference in constructive interference??

Posted by Rida Khan 8 years, 1 month ago

CBSE > Class 12 > Physics

4 answers

Preeti Kranti 8 years, 1 month ago

Sorry it is n lambda

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Preeti Kranti 8 years, 1 month ago

2n lambda.where n=1,2,3......So on

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Prabhjot Guraya 8 years, 1 month ago

Open arihant

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Sai Kanval 8 years, 1 month ago

In constructive interference , a crest meets a crest or a trough meets a trough, resulting in a larger crest or trough. Re-inforcementoccurs and the resultant amplitude is the algebraic sum of each waves amplitude. In destructive interference, a crest meets a trough and results in cancellation hence a smaller disturbance than either of the two interacting waves.

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Define resistance

Posted by Kundan Kumar 8 years, 1 month ago

CBSE > Class 12 > Physics