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The earth's magnetic field at a given po...

The earth's magnetic field at a given point is `0.5 xx 10^(-5) Wb m^(-2)`. This field is to be cancelled by magnetic induction at the centre of a circular conducting loop of radius 5.0 cm. The current required to be flown in the loop is nearly.

A

0.56 Amp

B

5.6 Amp

C

0.28 Amp

D

2.8 Amp

Text Solution

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

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

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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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