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Point P lies on the axis of a short magn...

Point P lies on the axis of a short magnetic dipole at a distance of 0.4 m from centre,point Q lies at a distance of 0.25 m from centre of the magnet and on the line inclined at `30^(@)` with the axis of the magnet.The ration of magnetic potentials at P and Q is

A

1.45

B

0.5

C

2.45

D

0.45

Text Solution

Verified by Experts

The correct Answer is:
D
`V_(P)/(V_(Q))=(r_(Q)^(2))/(r_(p)^(2)costheta)=(625xx10^(-4))/(16xx10^(-2)xxcos30)=0.45`
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Knowledge Check

  • Magnetic p[otential at a point of 0.5 m from the centre of short dipole and on a line inclined at 30^(@) with equator is 2xx10^(-5)J//Am .The magnitude of magnetic induction at that point is nearly

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