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Which of the following is // are correc...

Which of the following is `//` are correct about electric current ?

A

Current is a scalar quantity

B

Conventional current is along the direction of flow of positive charges

C

Conventional current is along the direction opposite to flow of free electrons

D

All of these

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AAKASH INSTITUTE-CURRENT ELECTRICITY-ASSIGNMENT(SECTION-A(OBJECTIVE TYPE QUESTIONS))
  1. S.I. unit of current is :-

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  2. Current l versus time t graph through a conductor is shown in the fig...

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  3. Which of the following is // are correct about electric current ?

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  4. The average velocity of electrons in a conductor in the absence of ele...

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  5. Thermal speed v of free electrons in a conductor at absolute temperaur...

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  6. When a circuit is switched on, current flows through the circuit with...

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  7. The conducting medium in which flow of positive ions and negative ion...

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  8. If V is the potential difference between the ends of conductor and l i...

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  9. The resistance of a conductor depends on its

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  10. If the length of a conductor is increased by 100% keeping its area of...

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  11. If the radius of cross-section of the conductor is increased by 0.1 % ...

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  12. Which of the following is a non metallic conductor

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  13. If vec(j) and vec(E ) are current density and electric field respectiv...

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  14. Current density vec(j ) at an area vec( A) = ( 2 hat(i ) + 3 hat(j)...

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  15. Which of the following represents the ohm's law ?

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  16. The ratio of magnitude of current density and magnitude of electric fi...

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  17. Conductivity of a conductor of length L and radius of cross-section r ...

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  18. Resistance of the conductor of length 5m and area of cross -section 4...

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  19. When electric field is applied inside a conductor then free electron ...

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  20. If n,e,A and v(d) are free electron density inside conductor , charge...

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