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

It states that electron revolve around the nucleus in a fixed circular path called orbit electrostatic force of attraction between electron and nucleus (proton) is balanced by centrifugal force.

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A swimmer can swim in still water at a speed of 5m/s . While crossing the river his average speed is 3m/s.I f he crosses the river in possible shortest time,what is the velocity of water?? a) 2m/s b)4m/s c) 6m/s. D)8m/s

Posted by Monisha T 8 years ago

CBSE > Class 12 > Physics

1 answers

Ayush Tiwari 8 years ago

Answer will be option a .2m/s

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Agar mein do me fail ho tu compartment hogi y 12 waps krni pdegi

Posted by Pawan Kumar 8 years ago

CBSE > Class 12 > Physics

1 answers

Nisha Rathore 8 years ago

Do se zada me fail hoge to 12th repeat krna padega do me aaya to compt Dena padega

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Law of motion

Posted by Rahul Singh Jadon 8 years ago

CBSE > Class 12 > Physics

1 answers

Rimjhim Kumari 8 years ago

1.inertia 2.time rate of change in momentum is directly proportional to the external force applied. 3.every action have equal and opposite reaction.

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If someone fails in one of the main subjects and passes in rest five (including the 6th optional). Is he/she declared pass? Do they need to give compartment? Is giving compartment compulsory?

Posted by Shefali Dehury 8 years ago

CBSE > Class 12 > Physics

3 answers

Vithika Singh 8 years ago

Jiska optional hoga wo fail nhi krega supposed that agr kisi ek main sub me fail hue to rest five sub k marks count honge aur tm pass kahlaoge aur nahi kahi prblm hgi admission me

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Nidhi Mishra 8 years ago

mughe chemistry me dar hai?

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Rahul Chauhan 8 years ago

Yeah to get admission in best colleges

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two point charges each of magnitude 20×10^-5 coulomb are separated by a distance of 1.5 m in large vessel of water . The relative permittivity of water is 80 . Calculate the force between them.

Posted by Aayush Haldkar 8 years ago

CBSE > Class 12 > Physics

1 answers

Nitesh Kumar 5 years, 2 months ago

anser

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Is compartment exam or improvement exam for cbse same????

Posted by Abhishek Kumar 8 years ago

CBSE > Class 12 > Physics

0 answers

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How do photons have momentum without mass

Posted by Sam M 8 years ago

CBSE > Class 12 > Physics

0 answers

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In how many subjects can a person give compartment exam in 12th CBSE?

Posted by Goutam Singh 8 years ago

CBSE > Class 12 > Physics

2 answers

Rahul Chauhan 8 years ago

Only 1...

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Vithika Singh 8 years ago

Mjhe v Jan na h

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Whyelectric field lines not crosses each other

Posted by Manvik Malhotra 8 years ago

CBSE > Class 12 > Physics

2 answers

A Cj 8 years ago

Wow....u asked too early

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Divyanshi Singh 8 years ago

If the lines cross each other at a given location, then there must be two distinctly different values of electric field with their own individual direction at that given location. This could never be the case. Every single location in space has its own electric field strength and direction associated with it

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Coulomb law in vector

Posted by Himanshu Swami 8 years ago

CBSE > Class 12 > Physics