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

it necessary that the field lines from a point charge placed in the vicinity of a conductor must be normal to the conductor at every point. would have a tangential component which will make electrons move along the surface creating surface currents and the conductor will not be in equilibrium.

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What is the precaution to be taken in selecting the Gaussian surface regarding the charge?

Posted by Mohsina Fargia Rahman 4 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Sia ? 4 years, 4 months ago

Generally, you want to pick one with the same symmetry as the charge distribution, such that the magnitude of E is constant (or zero) over the surface. For spherical symmetry, this is a sphere: everywhere equidistant from the centre has the same magnitude E.

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Anurag Tripathi 4 years, 4 months ago

If u wana join mycbseguide insta group the follw me on insta internationallvillager

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Board exam cancelled ☺

Posted by Aahana ❄❄ 4 years, 4 months ago

CBSE > Class 12 > Physics

5 answers

Anurag Tripathi 4 years, 4 months ago

If u wana join the mycbseguide insta group follw me at internationallvillager

2Thank You

Aahana ❄❄ 4 years, 4 months ago

Thank you tanya sis?? Or mere bhaiyo ko to vishwas nhi ho raha kya ho gaya ??????

1Thank You

Black Panther 4 years, 4 months ago

Good decision by govt.

1Thank You

Tanya ?? 4 years, 4 months ago

Yess ???itni khushi...itni khushi mujhe aaj tk nhi hui???aahana sis...aab apke brothers aapko nhi chidaege??

4Thank You

Aman ❤️ 4 years, 4 months ago

Yeahh?

1Thank You

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Draw the field line when the charge density of the sphere is (i) Positive (ii) Negative. Q4. Plot a graph comparing the variation of potential V and electric field E due to a point charge q as a function of distance r from the point charge.

Posted by All Tec Manish Meena 4 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Why test charge is always taken positive.

Posted by Abhishek Kumar 4 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Aryan Yadav 4 years, 4 months ago

Yes

3Thank You

Sia ? 4 years, 4 months ago

We take positive charge as a test charge because positive charge is higher potential and negative charge is lower potential. Therefore, influence of positive charge on other charges is greater than negative charges.

4Thank You

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Abonite rod is metal or non metal.

Posted by Har Har Mahadev 🙏 4 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 4 years, 4 months ago

Ebonite is a non metal

0Thank You

ANSWER

Focal length is 10 cm . Find power ?

Posted by Mouli Ghosh 4 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Saloni Kaushik 4 years, 4 months ago

Power=1/focal length. Hence, power is 0.1

1Thank You

Abhishek Gupta 4 years, 4 months ago

0.1

2Thank You

ANSWER

Electric field due to infinite line charge ?

Posted by Shashwat Singh 4 years, 4 months ago

CBSE > Class 12 > Physics

4 answers

Shashwat Singh 4 years, 4 months ago

Mai bhi badhiya ?

3Thank You

Pk .. 4 years, 4 months ago

?Haa ache hai....aap batao?

1Thank You

Shashwat Singh 4 years, 4 months ago

Thanks bro ?‍♀️ .... How are you?

2Thank You

Pk .. 4 years, 4 months ago

(Linear charge density) / (permittivity of vaccum ×2πr).

2Thank You

ANSWER

Your mind is your biggest enemy . ---Ad Idem

Posted by Siddharth .(.$Id) 4 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

The displacement (x) of a point moving in a straight lineis given by . Then the velocity of theparticle is zero at:1. 0.4 s2. 0.25 s3. 0.5 s4. 0.3 s

Posted by Karishma Bhadana 4 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Estimate the number of free electron in 36g of water and negative charge possessed by them .Given avogadro number and molecular weight of water 18

Posted by Shama Iqbal 4 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

I just need some new people in maah so called life. Plzz accompany me guys.?✌️

Posted by Siddharth .(.$Id) 4 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Aahana ❄❄ 4 years, 4 months ago

Bro take it easy:: It happens :: Always be positive ???? Beleive in yourself ?

1Thank You

ANSWER

Magnetic declination and dip

Posted by Pinkey Sri 4 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Nidhi Bharti 4 years, 4 months ago

Angle of dip is the angle made by a dip needle in magnetic meridian with the horizontal axis of earth's magnetic field. Angle of declination is the angle between magnetic meridian and geographic meridian of earth

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Which chapter of physics in class 12 is very hard?

Posted by Priyanshu Kumar 4 years, 4 months ago

CBSE > Class 12 > Physics

5 answers

Ayush Thakur 4 years, 4 months ago

Nothing

0Thank You

Anurag Saral 4 years, 4 months ago

Electromagnetic waves... lol

1Thank You

Aahana ❄❄ 4 years, 4 months ago

Optics

0Thank You

Bhanu Khumawat 4 years, 4 months ago

Wave optics

0Thank You

Black Panther 4 years, 4 months ago

Electrostatics

2Thank You

ANSWER

Is motional electro motive force topic is deleted for class 12 Board exam 2021?

Posted by Swetha Gopinathan 4 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Atharva Verma 4 years, 4 months ago

Nope

0Thank You

Zaki Khan 4 years, 4 months ago

0Thank You

ANSWER

What is the dimension of Boltzman's constant

Posted by Kd Kaaku 4 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 4 years, 4 months ago

the Boltzmann constant is dimensionally represented as [M¹L² T^-2 K^-1].

1Thank You

ANSWER

A very high level Question With Solution

Posted by Itzsabre Queen 4 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is molar mass

Posted by Pratik Ranjan 4 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Vishal Singh 4 years, 4 months ago

Mass of one mole of substance in grams is called molar mass

0Thank You

Taranveer Singh 4 years, 4 months ago

Mass of one mole

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ANSWER

Can u tell me capacitance is a scaler or vector quantity.why

Posted by Prince Raj 4 years, 4 months ago

CBSE > Class 12 > Physics

5 answers

Shraddha Verma 4 years, 4 months ago

Scalar

0Thank You

Pratik Ranjan 4 years, 4 months ago

It is scaler

0Thank You

Atharva Rana 4 years, 4 months ago

It's scalar

0Thank You

Ssc&Railways Updates 4 years, 4 months ago

Capacitance is a scalar quantity??

0Thank You

Ankush Sharma 4 years, 4 months ago

Its a scaler quantity becouse its form of energy i.e U .

1Thank You

ANSWER

Physical properties

Posted by Khadesi Gaming 4 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Itzsabre Queen 4 years, 4 months ago

What Uhh want Definition, About ??

2Thank You

Shlok Saini 4 years, 4 months ago

See in ncrt

4Thank You

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Sasur

Posted by Khadesi Gaming 4 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Truth of ohm's law

Posted by Khushi Bundela 4 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 4 years, 4 months ago

Ohm's law states that the current through a conductor is proportional to the voltage across the conductor. This is true for many materials (including metals) provided the temperature (and other physical factors) remain constant.

1Thank You

ANSWER

Define the term ‘drift velocity’. How will it change with increase in temperature of the conductor.

Posted by Sayukta Thakur 4 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Capacitance? ?

Posted by Shashwat Singh 4 years, 4 months ago

CBSE > Class 12 > Physics

5 answers

? Royal Thakur ? 4 years, 4 months ago

Ryt ??????

2Thank You

Shashwat Singh 4 years, 4 months ago

Mtlb kisi ki padhai nhi ho rii.. Mai akeli nhi hu??

2Thank You

? Royal Thakur ? 4 years, 4 months ago

Same here sb shi h except studies ?

1Thank You

Shashwat Singh 4 years, 4 months ago

Abhi nhi chal rii... Shayad june se chalegi.. ?... Or baki sbb chal rha.. bss padhai ko chor k.. aap btao...? ?

2Thank You

Pritam Rajput 4 years, 4 months ago

Capacitance is a device which is used for storing the charge

3Thank You

ANSWER

What is potential energy? ?

Posted by Shashwat Singh 4 years, 4 months ago

CBSE > Class 12 > Physics

5 answers

? Royal Thakur ? 4 years, 4 months ago

Aur pdhai kaise chl rhi h ...??

1Thank You

? Royal Thakur ? 4 years, 4 months ago

Sb badhiya h ....nhi use krta hu ?....ab jo bhi uss krna h 12th ke baad ...?....feelhal to aadhe se jyada tym zoom pe he chla jata h aur smjh kuch nhi aata ....???.....apki onlind classes chl rhi h ...??

2Thank You

Shashwat Singh 4 years, 4 months ago

Btw... koi social media to use krte nhi aap?.... telegram use krte ho kya? ?

1Thank You

Shashwat Singh 4 years, 4 months ago

Badhiya hu.. aap btao? ?... aise hi man kiya to aa gyii????

1Thank You

? Royal Thakur ? 4 years, 4 months ago

?Hello Sis ?.....kaise ho ..? vaise aaj yhaan Kaise ? ....?

3Thank You

ANSWER

State lenzs law.give one example to illustrate this law