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a narrow copper wire of length l and radius b is attached to a wide copper wire of length l and radius 2b, forming one long wire of length 2l. this long wire is attached to a battery, and a current is flowing through it. if the electric field in the narrow wire is e, the electric field in the wide wire is

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a narrow copper wire of length l and radius b is attached to a wide copper wire of length l and radius 2b, forming one long wire of length 2l. this long wire is attached to a battery, and a current is flowing through it. if the electric field in the narrow wire is e, the electric field in the wide wire is bilgi90'dan bulabilirsiniz

Electric field in the narrow wire

A narrow copper wire of length L and radius b is attached... - en.ya.guru

Answer by Guest

Answer:

E.

Explanation:

As we know that Current in both wire will be same but both have different resistance as per

$R_1 = \rho L/A$

$R_2 =\rho L/4A$ (As the radius is doubled so cross sectional area will become four times).

Hence, $R_1 = 4\times(R_2)$

therefore, if current is same in both then voltage will be -

$V_1=4\times(V_2)$ (As V proportional to R , i is same in all)

then-

E_1 = 4(E_2) (As E proportional V , r is same in all)

$\Rightarrow E2 = \frac{(E_1)}{4}$ (Electric feild in wide wire)

Option E.

Yazı kaynağı : enya.day

A narrow copper wire of length L and radius b is attached to a wide copper wire of length L and radius 2b, forming one long wire of length 2L. This long wire is attached to a battery, and a current is flowing through it. If the electric field in the narro | Homework.Study.com

We are given

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