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

a field in physics means a physical object that have a finite value everywhere in given region of space . el;ectric field is a space around charged object where the influence of charge can be felt . now as a charge can experience force due to anathor charge , thus the influence here become the force , so. E.F can be called as a force field too . mathematically , in this case electric field intensity , which is force experience by a test charge placed at that point of the field gives the estimate of strength of field at that point .

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Why do we see rainbow in semi circular shape?

Posted by Saduo Kyapaomai 7 years, 5 months ago

CBSE > Class 12 > Physics

3 answers

Go Pika 7 years, 5 months ago

One of my teacher had once said me that rainbow is circular. If we are able to see from a airplane we may see it. I don't know how much it's true. And this answer is my assumption

1Thank You

Saduo Kyapaomai 7 years, 5 months ago

Thanks

1Thank You

Go Pika 7 years, 5 months ago

Bacause the water molecules keep bending them so that's why that's like that!

1Thank You

ANSWER

Formula of elctric potential

Posted by Aman Singh 7 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Go Pika 7 years, 5 months ago

Kq/r*

5Thank You

Go Pika 7 years, 5 months ago

V=Kq/e

1Thank You

ANSWER

I made a electromagnetic pen but it's power is too weak so what can i do to increase the power ? I use silver wire in it.

Posted by Devraj Pahariya 7 years, 5 months ago

CBSE > Class 12 > Physics

4 answers

Go Pika 7 years, 5 months ago

I said you can't apply a sq - b sq formula for a sq - a sq . If you say like that price like that then it's consequences will be 1=2=3...9 then what's the use of Keeing a number system?

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Go Pika 7 years, 5 months ago

Where what which? I sent it. Go back a read.

0Thank You

Devraj Pahariya 7 years, 5 months ago

Send ur answer

0Thank You

Go Pika 7 years, 5 months ago

You were the person who asked why 10sq - 10sq = 10sq - 10sq . Yesterday. And you didn't read the to my answer

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ANSWER

Explanation of charging by induction

Posted by Jahnavi Sheth 7 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

so finally exams are over . so whats your future plan ( i mean which courses you all will join and all )

Posted by Vineet Kumar Gupta 7 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Go Pika 7 years, 5 months ago

-_- you forgot bio and Hindi students here?

2Thank You

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Experts plz answer four charges q 2q 3q 4q are present at vertices of of square find force at intersection of diagonals

Posted by Nishtha Garg 7 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Go Pika 7 years, 5 months ago

That's system of charges. Even it's formula is given in our book. 1st find the force by charge q then 2q 3 and 4 . Where the distance you'll find using Pythagoras therom. You need to add all the force.

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Go Pika 7 years, 5 months ago

Experts who?

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ANSWER

Behaviour of gas

Posted by Ananya Chatterjee 7 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Devraj Pahariya 7 years, 5 months ago

Aacha joke hai

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Abc A 7 years, 5 months ago

Very bad behaviour

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Why orange float on water?

Posted by Devraj Pahariya 7 years, 5 months ago

CBSE > Class 12 > Physics

4 answers

Devraj Pahariya 7 years, 5 months ago

It float because of the pour present on it

1Thank You

Devraj Pahariya 7 years, 5 months ago

Your answer is wrong

2Thank You

Go Pika 7 years, 5 months ago

Density is lower!?! Like we used to explain for ice floating on water

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Go Pika 7 years, 5 months ago

Beyonce

1Thank You

ANSWER

Why clouds not come on earth due to gravity when ready to rain

Posted by Amit Kumar 7 years, 5 months ago

CBSE > Class 12 > Physics

8 answers

Sumit Ghosh 7 years, 5 months ago

Ya bcoz of the air resistance. It couldn't reach early. That only i was telling.

0Thank You

Devraj Pahariya 7 years, 5 months ago

Gravity is not depand on mass in vaccum but in normal air havier body reach early than the lighter body

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Sumit Ghosh 7 years, 5 months ago

Who told you that gravity doesn't act on body having lower masses. Infact gravity is not dependent on the mass og the body. g=GM/R^2. but the force is so low that it is counter Balanced by the air resistive force.

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Devraj Pahariya 7 years, 5 months ago

Clouds are made up of vapour so it's mass is very less so there is no effect of gravity on it

2Thank You

Go Pika 7 years, 5 months ago

They come down in the form if rain

0Thank You

Go Pika 7 years, 5 months ago

Mass of water vapour

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Go Pika 7 years, 5 months ago

Clouds are gases. Mass of gases probably

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Go Pika 7 years, 5 months ago

Wow

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Who stepped 4th on the moon.

Posted by Go Pika 7 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

The stopping potential for the photoelectron emitted from a metal surface of work function 1.7ev is 10.4 find wavelength of radiation used

Posted by Aakashdeep Sharma 7 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Go Pika 7 years, 5 months ago

Use that kinetic energy equation to find the E value

0Thank You

Go Pika 7 years, 5 months ago

With Vo value you can find energy E=eVo with this E value find lamda value using lamda = hc/E

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ANSWER

Apart from charge what other quantities are conserved?

Posted by Kalas Sahu 7 years, 5 months ago

CBSE > Class 12 > Physics

3 answers

Sumit Ghosh 7 years, 5 months ago

Energy

0Thank You

Sumit Ghosh 7 years, 5 months ago

Go Pz i think is not at all conserved. Mass and energy taken together are conserved. E=dell(m) c^2.

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Go Pika 7 years, 5 months ago

Energy

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Bhaiyo smoke me gravity hoti h kya.?

Posted by Zuber Khan 7 years, 5 months ago

CBSE > Class 12 > Physics

3 answers

Go Pika 7 years, 5 months ago

Highly negligible due to light mass!

1Thank You

Go Pika 7 years, 5 months ago

You mean like smokes will be pulled by gravity?

3Thank You

Manoranjan Singh 7 years, 5 months ago

May be

0Thank You

ANSWER

hlw

Posted by Lokesh Gautam 7 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Go Pika 7 years, 5 months ago

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ANSWER

What is the dimensions of permitivity

Posted by Himanshu Sandhu 7 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Krichhkoff s rule

Posted by Bijender Kumar 7 years, 5 months ago

CBSE > Class 12 > Physics

4 answers

Go Pika 7 years, 5 months ago

Sum of current leaving a junction is equal to sum of current entering the junction

0Thank You

Go Pika 7 years, 5 months ago

The algebraic sum of voltage difference across circular elements like resistor battery etc. in a closer circuit is zero. This is loop rule. Previous one is junction rule

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Go Pika 7 years, 5 months ago

Sorry they will be equal

2Thank You

Go Pika 7 years, 5 months ago

Sum of Current leaving and entering a junction is zero.

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how i apply for a reappear

Posted by Dilpreet Singh 7 years, 5 months ago

CBSE > Class 12 > Physics