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The magnetic field at the centre of dott...

The magnetic field at the centre of dotted circle in the arrangement shown is

A

`(mu_(0)l)/(4R) + (mu_(0)l)/(2piR)`

B

`(mu_(0)l)/(4R)`

C

`(mu_(0)l)/(2piR)`

D

zero

Text Solution

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The correct Answer is:
C
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AAKASH INSTITUTE ENGLISH-MOVING CHARGES AND MAGNETISM-Assignment (Section B) Objective Type Questions (One option is correct)
  1. A ring carrying current l lies in x-z plane as shown. A short magnetic...

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  2. Figure shows an arrangement in which long parallel wires carrying equa...

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  3. The magnetic field at the centre of dotted circle in the arrangement s...

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  4. In an attempt to increases the current sensitivity of a moving coil ga...

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  5. What is the magnetic field |vec(B)| at the point P due to a current ca...

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  6. A wire of infinite length bent as shown in figure carries current l. W...

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  7. A wire PQR carrying a current l is bent as shown in the figure. It is ...

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  8. In the figure, the current l enters the circular loop of uniform wire ...

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

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

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

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  12. A proton, a deuteron and an alpha particle moving with equal kinetic ...

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

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

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

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

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

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

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

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

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