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An aluminium ring B faces an electromagn...

An aluminium ring `B` faces an electromagnet `A`. The current `I` through `A` can be altered

A

whether `l` increases or decreases, `B` will not experinence any force

B

if `l` decreases, `A` will repel `B`

C

if `l` increases, `A` will attract `B`

D

if `l` increases, `A` will repel `B`

Text Solution

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The correct Answer is:
D
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CP SINGH-ELECTROMAGNETIC INDUCTION-EXERCISES
  1. As shown in the figure, P and Q are two coaxial conducting loops separ...

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  2. shows a horizontal solenoid connected to a battery and a switch. A cop...

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  3. An aluminium ring B faces an electromagnet A. The current I through A ...

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  4. A conduting ring R is placed on the axis of a bar magnet M . The plane...

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  5. Two circular loops of equal radii are placed coaxially at some separat...

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  6. Two identical coaxial circular loops carry a current i each circulatin...

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  7. Two circular coil P and Q are arranged coaxially as shown. The sign co...

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  8. Two circular loops P and Q are placed with their planes paraller to ea...

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  9. A small, conducting circular loop is placed inside a long solenoid car...

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  10. A small magnet M is allowed to fall through a fixed horizontal conduct...

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  11. In the previous question, the directions of the current flowing in the...

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  12. A copper ring having a cut such as not to from a complete loop is held...

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  13. Lenz's law is consequence of the law of conservation of

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  14. A coducting circular loop of area 1mm^2 is placed coplanarly with a lo...

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  15. A rectangular coil of single trun, having area A , rotates in a unifor...

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  16. A conducting square loop having edges of length2.0 cm is rotated throu...

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  17. A conducting looop of area 5.0cm^(2) is placed in a magnetic field whi...

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  18. A thin circular ring of area A is held perpendicular to a uniform magn...

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  19. A rectangular coil is placed in a region having a uniform magnetic fie...

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  20. A cylindrical bar amgnet is kept along the axis of a circular coil. If...

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