Question

A straight wire of linear charge density a = 3 uC/mand area of cross section A = 4 mm² is given asshown in figure. When wire is pulled with speed 2m/s, then current associated with it isda1+ + + + + + + + + hk dLV(1) 2 MA(2) 6 mA(4) 4 HAThe charge q in a spherical(3) 6 MA2​

Answer 1

Answer:

So current due to motion of wire is 6 micro A

Explanation:

As we know that linear charge density of the wire is given as

$\lambda = 3 \frac{\mu C}{m}$

now if a small element on the wire is taken then charge of the element is given as

$dq = \lambda dx$

now rate of flow of the charge is current

so we have

$i = \frac{dq}{dt}$

so we have

$i = \lambda (\frac{dx}{dt}$

$i = \lambda v$

$i = (3 \mu C/m)(2)$

$i = 6 \mu A$

#Learn

Topic : Electric current

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