Physics, asked by susain2001, 11 months ago

Can anyone help me with question 49??

Attachments:

Arceus11: is it (a)?

Yazlin: no assertion is false

Arceus11: no, electric field is zero outside a conductor

Arceus11: if current be changing at some rate, then it is not zero

susain2001: Its d

Answers

Answered by Yazlin

I think it is (d).......

Arceus11: i don't know such equation

Yazlin: q means linear charge density

Arceus11: it is for the field around a charged infinte wire i think

Yazlin: yes it is

Yazlin: I am confused plz clear it for me

Yazlin: can I ask you one more question

Yazlin: there is force between 2 current carrying wires if there is no electric field then how this force exists

susain2001: Force exist due to magnetic field. ..I think. .

Yazlin: ok

Arceus11: yup

Answered by Arceus11

Answer:

Assertion is true. Reason, I'm not clear about the sentence itself. If protons are stationary in one case, and in the other case, electrons are stationary, then the statement is true. If both are moving simultaneously, it is false.

Explanation:

The conducting wire has electrons and protons, which will cancel to give us net charge as zero. If we take a Gaussian surface (A cube, for example), we have:

$\oint \vec{E}\cdot d\vec{A}= \frac{ Q_{in}}{\varepsilon}$

As Q=0, E=0.

susain2001: Assertion is true. Got it.

Arceus11: yup

susain2001: Well the reason is false as protons actually don't move. Now I am sure. 100%

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