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Ask QuestionPosted by Bbavya Mittal 4 years, 11 months ago
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Sunidhi Taya 4 years, 11 months ago
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Posted by Goyi Bole 4 years, 11 months ago
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Gaurav Seth 4 years, 11 months ago
Because the net charge inside a conductor remains zero , the total charge of a conductor resides on its surface , as charges want to attain equilibrium so they come on surface , to minimize the repulsion among them .As the charge inside a conductor is zero therefore , if we apply Gauss' theorem to find the electric field inside a conductor , we find it zero .
Posted by Goyi Bole 4 years, 11 months ago
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Posted by Poorvi Garg 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
The self-inductance of the coil depends on its geometry and on the permeability of the medium. The self-induced emf is also called the back emf as it opposes any change in the current in a circuit. Physically, the self-inductance plays the role of inertia. It is the electromagnetic analogue of mass in mechanics. So, work needs to be done against the back emf (ε) in establishing the current. This work done is stored as magnetic potential energy
Posted by Ashwini Anbalagan 4 years, 11 months ago
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Gaurav Seth 4 years, 11 months ago
On July 7, HRD Minister Ramesh Pokhriyal announced a major CBSE syllabus reduction with 30% of the syllabus slashed for the year 2020-21 for classes 9 to 12 because of the reduction in classroom teaching time due to the Covid-19 pandemic and lockdown.
CBSE has rationalized the syllabus with the help of suggestions from NCERT and the same has been notified by a new CBSE notification as well.
Click on the given link:
<a data-toggle="collapse" href="http://cbseacademic.nic.in/Revisedcurriculum_2021.html#collapse1">Revised Senior Secondary Curriculum (XI-XII)</a>
Posted by Mr. Fake... 4 years, 8 months ago
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Posted by Devil ? 4 years, 11 months ago
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Rounik Roy 4 years, 11 months ago
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Posted by Tanya ?? 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
Spherical Wavefront
- When the source of light is a point source the wavefront formed will be spherical wavefront.
- Point source means the source of light is so small that it is considered as point. It can be considered as dimensionless.
- For example: - Ripples in water are in the form of concentric circles which are spherical wavefronts.
Posted by Monica Suresh 4 years, 11 months ago
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Gaurav Seth 4 years, 11 months ago
Explanation:
Charge of each nucleus = 29e
∴ Net charge 2 gm sphere = (29e) × (2 × 1022) = 5.8 × 1023e c.
∴ No of electrons on sphere = 5.8 × 1023
∴ No of electrons removed to give 2μc charge
= (q/e)
= [(2 × 10–6)/(1.6 × 10–19)]
= 1.25 × 1013
∴ fraction of electrons removed = [(1.25 × 1013)/(5.8 × 1023)]
= 2.16 × 10–11
Gaurav Seth 4 years, 11 months ago
A copper sphere of mass 2 g contains nearly 2 x 1022 atoms. The charge on the nucleus of each atom is 29 e. What fraction of the electrons must be removed from the sphere to give it a charge of +2 μC?
<hr />Total number of electrons in the sphere = 29 x 2 x 1022
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Yogita Ingle 4 years, 11 months ago
The EM waves are produced by the accelerated charge. The electron jumping from its outer to inner orbits radiates EM waves. These EM waves are propagated as electric and magnetic fields oscillating in mutually perpendicular directions which is cause of momentum and energy.
</article>Posted by Sneha Saini 4 years, 11 months ago
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Harsh Tiwari 4 years, 11 months ago
Gaurav Seth 4 years, 11 months ago
Electrostatic Potential : The electrostatic potential at any point in an electric field is equal to the amount of work done per unit positive test charge or in bringing the unit positive test charge from infinite to that point, against the electrostatic force without acceleration.
Posted by Syed Ayesha Ayesha Jii 4 years, 11 months ago
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Posted by Ramesh Kalavvagola 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
In an experimental set up for photoelectric effect, the value of negative potential of collector plate or anode at which the photoelectric current will reduce to zero is called stopping potential (V0) for the given frequency of incident radiation.
Posted by Pranus Roy 4 years, 11 months ago
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