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  • 2 answers

Shiva Shiva 5 months, 1 week ago

You tell me in hindi

Yogita Ingle 5 months, 2 weeks ago

Huygen's Principle:

(i) Every point on a given wave front (called primary wave front) acts as a fresh source of new disturbance, called secondary wavelets which travel in all directions with the velocity of light in the medium.

(ii) The forward envelope of these secondary wavelets gives the new wave front at any instance.This is called secondary wave front.

Consider a plane wavefront AB incident on a surface PQ separating two media 1 and 2.
The medium 1 is a rarer medium of refractive index n1  in which light travels with a velocity C1  The medium 2 is a denser medium of refractive index n2  in which light travels with a velocity C2.

  • 1 answers

Subham Kumar 5 months, 2 weeks ago

2019 physics class 12th
  • 1 answers

Yogita Ingle 5 months, 3 weeks ago

Coulomb’s Law

Coulomb’s law states that Force exerted between two point charges:

  • Is inversely proportional to square of the distance between these charges and
  • Is directly proportional to product of magnitude of the two charges
  • Acts along the line joining the two point charges.
  • 1 answers

Yogita Ingle 5 months, 4 weeks ago

Brewster’s law:- Brewster’s law states that at any particular angle of incidence, reflected ray is completely polarized; and the angle between reflected and refracted ray is 900.

  • 1 answers

G L Badola 5 months, 2 weeks ago

The energy obtained from the conversion of nuclear mass is known as nuclear energy
  • 1 answers

Vikram Singh 7 months, 3 weeks ago

1 upon 4 Pi Epsilon naught to 1 upon r2 square
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Yogita Ingle 10 months, 1 week ago

It is the measure of the strength of electric dipole. Its magnitude is equal to the product of the magnitude of any one charge and the distance between them.

  • 1 answers

Gaurav Saini 9 months, 3 weeks ago

1. Electrostatic. Mark-08 2. Current Electicity. Mark-07 3. Magnetic effect of current and magnetism. Mark-08 4. Electomagnetic induction and Alternating current. Mark-08 5. Electromagnetic waves. Mark-03 6. optics. Mark-14 7. Dual Nature of Matter and Radiation -04 8. Atoms and Nuclei. Mark-06 9. Electronic Devices. Mark-07 10.communication systems. Mark-05
  • 2 answers

Sahil Saifi 11 months, 3 weeks ago

Koi numerical solve keejiye is niyam se

Gaurav Seth 1 year, 4 months ago

ओम का नियम

परिभाषा : नियत ताप पर ओम के नियम के अनुसार, एक चालक से गुजरने वाली धारा चालक पर विभवांतर के सीधे समानुपाती होती है। 
इस तरह से, यदि एक चालक से प्रवाहित धारा I है और V तार पर विभवांतर (या वोल्टता) है, तब ओम के नियम के अनुसार, 
I ∝ V (जब T नियत हो) 
या, I = V/R ...(i) 
जहाँ R एक नियतांक है, जिसे चालक का प्रतिरोध कहा जाता है। 
समीकरण (i) को लिखा जा सकता है - 
V = I x R ...(ii) 
प्रतिरोध की इकार्इ : 
प्रतिरोध (R) की SI इकार्इ ओम है। ओम को ग्रीक अक्षर ओमेगा (Ω) से प्रदर्शित किया जाता है। 
ओम के नियम से, R = V/I 
अब, यदि, V = 1 वोल्ट और I = 1 एम्पियर 
इस प्रकार, 1 ओम चालक का वह प्रतिरोध है जो इसमें से 1 एम्पियर धारा को प्रवाहित होने देता है जब इसके सिरो पर 1 वोल्ट विभवान्तर लगाए रखा जाता है। 
ओम के नियम के परिणाम 
एक चालक से प्रवाहित धारा चालक के सिरों पर लगाए गये विभवान्तर के सीधे समानुपाती होती है। 
जब एक परिपथ में विभवान्तर नियत रखा जाता है, तो धारा चालक के प्रतिरोध के व्युत्क्रमानुपाती होती है। 
I ∝ 1/R 
विभवान्तर एवं धारा के मध्य अनुपात नियत रहता है। नियतांक का मान चालक (या प्रतिरोध) के प्रतिरोध पर निर्भर करता है। 
V/I = R

  • 1 answers

Yogita Ingle 1 year, 8 months ago

We apply Gauss’s Law in following way:

  • Choose a Gaussian surface, such that evaluation of electric field becomes easy.

  • Make use of symmetry to make problems easier.

  • Remember, it is not necessary that Gaussian surface to coincide with real surface that is, it can be inside or outside the Gaussian surface

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