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Electric current density is ..... ....

Electric current density is ..... .

A

vector quantity

B

scalar quantity

C

fundamental quantity

D

having unit` Am^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
vector quantity
We have J = `sigma` E where `sigma` scalar and E is vector. Hence j must be vector.
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KUMAR PRAKASHAN-CURRENT ELECTRICITY-SECTION [D] MULTIPLE CHOICE QUESTIONS (MCQs) (MCQs FROM .DARPAN. BASED ON TEXTBOOK)
  1. Electric current is ..... .

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  2. Electric current density is ..... .

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  3. ampere xx second = ....

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  4. Unit of electric current density is .... .

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

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  6. An electron completes 25 rotations in 1 seconds on circular path, then...

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

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

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

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

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  11. 30 coulomb electric charge passes through conducting wire in 10 minute...

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

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

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

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

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

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

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

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

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

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