Find out magnetic field at point $O$ ?
Find out magnetic field at point $O$ ?
- A
$\pi\times {10^{ - 5}}\,T$
- B
$\pi\times {10^{ - 4}}\,T$
- C
$\pi\times {10^{ - 1}}\,T$
- D
${10^{ - 5}}\,T$
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A thin rod is bent in the shape of a small circle of radius $'r'$. If the charge per unit length of the rod is $'\sigma ',$ and if the circle is rotated about its axis at the rate of $'n'$ rotation per second, the magnetic induction at a point on the axis at a large distance $'y'$ from the centre is
Gauss is unit of which quantity
Gauss is unit of which quantity
A battery is connected between two points $A$ and $B$ on the circumference of a uniform conducting ring of radius $r$ and resistance $R$. One of the arcs $AB$ of the ring subtends an angle $\theta $ at the centre. The value of the magnetic induction at the centre due to the current in the ring is
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- [IIT 1995]
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The following statement is false for Helmholtz coils
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