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A square loop of side a carris a current...

A square loop of side a carris a current `I`. The magnetic field at the centre of the loop is

A

`(mu_(0)l)/(2 sqrt2 pi a)`

B

`(2sqrt2 mu_(0)l)/(pi a)`

C

`(mu_(0)l)/(sqrt2pi a)`

D

`(mu_(0)lsqrt2)/(pi a)`

Text Solution

Verified by Experts

The correct Answer is:
B
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AAKASH INSTITUTE ENGLISH-MOVING CHARGES AND MAGNETISM-Assignment (Section B) Objective Type Questions (One option is correct)
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  2. In the figure, the current l enters the circular loop of uniform wire ...

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  3. An electron is fired parallel to uniform electric and uniform magnetic...

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  4. The magnetic field inside a toroidal solenoid of radius R is B. If the...

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  5. A square loop of side a carris a current I. The magnetic field at the ...

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  7. A charge q enters into a magnetic field (B) perpendicularly with veloc...

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  8. A solid metallic cylinder carriers a direct current. The magnetic fiel...

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  9. Two identical magnetic dipoles of magnetic moments 1.0 A-m^(2) each, a...

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  10. For a given length l of wire carrying a current l, how many circular t...

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  11. Which of the following properties of magnetic line of force differs th...

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  12. The earth's magnetic field at a given point is 0.5 xx 10^(-5) Wb m^(-2...

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

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  14. A charge q is spread uniformly over an insulated loop of radius r. If ...

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  15. If plane of coil and uniform magnetic field B(4T0 is same then torque ...

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  16. What is the force experienced by a semicircular wire of radius R when ...

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  17. Suppose that a proton travelling in vacuum with velocity V(1) at right...

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  18. When two parallel wires carrying current l and 2l in same direction ar...

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  19. Calculate the torque acting upon the following structure carrying curr...

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  20. Keeping current per unit length of arc constant, the variation of magn...

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