Column II gives approximate values of magnetic field due to source given in column I

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Solution

This are some fact and information so
Magnetic field due to the sources are following:
A) At surface of neutron star is $10^{8} T$
B) Near big electromagnet $1.5 T$
C) At earth surface $10^{- 4} T$
D) In interstellar space $10^{- 5} T$

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Similar questions

Column I	Column II
$(A)$ Magnetic field due to infinite long wire	$(P)$ $B = \frac{μ_{0} I}{2 π d}$
$(B)$ Magnetic field due to current element	$(Q)$ $B = \frac{μ_{0} I N}{2 R}$
$(C)$ Magnetic field at centre of current carrying coil	$(R)$ $B = \frac{μ_{0} I N R^{2}}{2 (x^{2} + R^{2})^{3 / 2}}$
$(D)$ Magnetic field at axis of coil	$(S)$ $d B = \frac{μ_{0}}{4 π} \frac{I d l sin θ}{r^{2}}$

I

I I

Column $I$	Column $I I$
$a .$ Magnetic field inside a long straight solenoid is	$p .$ not constant
$b .$ Magnetic field inside a toroidal solenoid is	$q .$ zero
$c .$ Magnetic field inside a conducting hollow pipe having current parallel to its axis is	$r .$ constant
$d .$ Magnetic field due to current carrying wire on its surface is	$s .$ maximum

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