1
AIEEE 2005
+4
-1
A charged particle of mass $$m$$ and charge $$q$$ travels on a circular path of radius $$r$$ that is perpendicular to a magnetic field $$B.$$ The time taken by the particle to complete one revolution is
A
$${{2\pi {q^2}B} \over m}$$
B
$${{2\pi mq} \over B}$$
C
$${{2\pi m} \over {qB}}$$
D
$${{2\pi qB} \over m}$$
2
AIEEE 2004
+4
-1
A current $$i$$ ampere flows along an infinitely long straight thin walled tube, then the magnetic induction at any point inside the tube is
A
$${{{\mu _0}} \over {4\pi }},{{2i} \over r}$$ tesla
B
zero
C
infinite
D
$${{2i} \over r}$$ tesla
3
AIEEE 2004
+4
-1
A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is $$B.$$ It is then bent into a circular loop of $$n$$ turns. The magnetic field at the center of the coil will be
A
$$2n$$ $$B$$
B
$${n^2}\,B$$
C
$$nB$$
D
$$2{n^2}\,B$$
4
AIEEE 2004
+4
-1
The magnetic field due to a current carrying circular loop of radius $$3$$ $$cm$$ at a point on the axis at a distance of $$4$$ $$cm$$ from the centre is $$54\,\mu T.$$ What will be its value at the center of loop?
A
$$125\,\mu T$$
B
$$150\,\mu T$$
C
$$250\,\mu T$$
D
$$75\,\mu T$$
EXAM MAP
Medical
NEET