1
AIPMT 2011 Mains
+4
-1
A square loop, carrying a teady current $$I$$, is placed in a horizontal plane near a long straight conductor carrying a steady current $$I$$1 at a distance d from the conductor as shown in figure. The loop will experience
A
a net attractive force towards the conductor
B
a net repulsive force away from the conductor
C
a net torque acting upward perpendicular to the horizontal plane
D
a net torque acting downward normal to horizontal plane
2
AIPMT 2011 Prelims
+4
-1
A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected in the region such that its velocity is pointed along the direction of fields, then the electron
A
will turn towards right of direction of motion
B
speed will decrease
C
speed will increase
D
will turn towards left of direction of motion
3
AIPMT 2011 Prelims
+4
-1
A current carrying closed loop in the form of a right angle isosceles triangle ABC is placed in uniform magnetic field acting along AB. If the magnetic force on the arm BC is $$\overrightarrow {F,}$$ the force on the arm AC is

A
$$- \sqrt 2 \,\overrightarrow F$$
B
$$-$$ $$\,\overrightarrow F$$
C
$$\,\overrightarrow F$$
D
$$\sqrt 2 \,\overrightarrow F$$
4
AIPMT 2010 Mains
+4
-1
A current loop consists of two identical semicircular parts each of radius R, one lying in the x-y plane and the other in x-z plane. If the current in the loop is $$i$$. The resultant magnetic field due to the two semicircular parts at their common centre is
A
$${{{\mu _0}i} \over {2\sqrt 2 R}}$$
B
$${{{\mu _0}i} \over {2R}}$$
C
$${{{\mu _0}i} \over {4R}}$$
D
$${{{\mu _0}i} \over {\sqrt 2 R}}$$
EXAM MAP
Medical
NEET