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A steady current flows in a metallic con...

A steady current flows in a metallic conductor of non-uniform cross-section. Which of these quantities is constant along the conductor: current, current density, electric field, drift speed?

A

electric current density

B

electric current

C

drift velocity

D

electric field

Text Solution

Verified by Experts

The correct Answer is:
B
electric current
Given conductor is said to be made by connecting different conductors in series as shown and in series connection current always· remains same.
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KUMAR PRAKASHAN-CURRENT ELECTRICITY-SECTION [D] MULTIPLE CHOICE QUESTIONS (MCQs) (MCQs FROM .DARPAN. BASED ON TEXTBOOK)
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  2. Unit of electric current density is .... .

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  3. A steady current flows in a metallic conductor of non-uniform cross-se...

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  5. The current through a wire varies with time as I= I(0) + alpha t , whe...

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  6. Charge passing through a conductor carrying current is given by Q = 5t...

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  7. A charge of 2 xx 10^(-2) C moves at 30 revolutions per second in a ci...

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  8. A charge on electron is 1.6 xx 10^(-19) C. How many electrons will be ...

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  9. 30 coulomb electric charge passes through conducting wire in 10 minute...

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  10. In a hydrogen atom, the electron is moving in a circular orbit of radi...

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  11. A ring of radius R and linear charge density lambda on its surface is ...

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  12. Cross-sectional area of proton beam having electric current 1 muA is 0...

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  13. Current density in a copper wire is 2.5 xx 10^(8) Am^(-2). If 8A curre...

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  14. Charge passing through the cross-section of a conductor h given by Q =...

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  15. The current through a wire varies wilh time as I = I(0) + alpha t wh...

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  16. Electric charge passing through a resistor changes with time t as Q = ...

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  17. When an electric cell is in use, .... Relation holds good.

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  18. Resistivity of material does not depend on ...... of conductor

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  19. Lengths and cross-sectional areas of three copper wires are (l, A ), (...

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  20. Which of the following curve represents negative resistance ?

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