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A steady current flows through the condu...


A steady current flows through the conductor of variable cross-sectional area. Now select the correct options.

A

The value of current is same through the cross sections 1,2, and 3

B

The current density is the maximum at the cross sections 3

C

The drift velocity is greater at the cross-section 1

D

The electric field is maximum at the cross section 3.

Text Solution

Verified by Experts

The correct Answer is:
A, B, D
`I=nAv_(d)e`
`v_(d)=(I)/(nAe)`
We know for a conductor during the flow of steady current,
`E=(v)/(e)=(Ri)/(l)`
`E=(eli)/(Axxl)=(ei)/(A)`
`therefore` electric field is maximum at cross-section (3)
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