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A long straight wire carrying current of `30 A` is placed in an external uniform magnetic field of induction `4xx10^(-4) T`. The magnetic field is acting parallel to the direction of current. The magnitude of the resultant magnetic induction in tesla at a point `2.0 cm` away from the wire is

A

`10^(-4)`

B

`3 xx 10^(-4)`

C

`5 xx 10^(-4)`

D

`6 xx 10^(-4)`

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH INSTITUTE ENGLISH-MOVING CHARGES AND MAGNETISM-Assignment (Section A) Objective Type Questions (One option is correct)
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  3. A long straight wire carrying current of 30 A is placed in an exte...

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  4. Two similar coils are kept mutually perpendicular such that their cent...

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  5. The vector form of Biost-Savart law for a current carrying element is

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  6. Two long straight wires are set parallel to each other Each carries a ...

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  7. A long solonoid carrying a current produces a magnetic field along its...

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  8. A long solenoid has 200 turns per cm and carries a current of 2.5 amps...

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  9. If a long hollow copper pipe carriers a direct current, the magnetic f...

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  10. In a current carrying long solenoid, the field produced does not depen...

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  11. A long solenoid has 800 turns per metre length of solenoid. A current ...

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  12. A solenoid 1.5 metre and 4.0 cm in diameter possesses 10 turns/cm. A c...

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  13. A current of (1)/(4pi) A is flowing through a toroid. It has 1000 numb...

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  14. Mean radius of a toroid is 10 cm and number of turns is 500. If curren...

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  15. A long thin hollow metallic cylinder of radius R has a current I amper...

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  16. A proton an an alpha-particle, moving with the same velocity, enter a ...

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  17. A particle of mass M and charge Q moving with velocity v describe a ci...

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  18. An electron is travelling along the x-direction. It encounters a m...

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  19. Two ions having masses in the ratio charges 1:2 are projected into uni...

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  20. A charged particle is at rest in the region where magnetic field and e...

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