1
NEET 2013
MCQ (Single Correct Answer)
+4
-1
When a proton is released from rest in a room, it starts with an initial acceleration $$a$$0 towards west. When it is projected towards north with a speed $$v$$0 it moves with an initial acceleration 3$$a$$0 towards west. The an initial accelearation 3a0 towards west. The an initial acceleration 3$$a$$0 toward west. The electric and magnetic fields in the room are
A
$${{m{a_0}} \over e}$$ east,  $${{3m{a_0}} \over {e{v_0}}}$$ up
B
$${{m{a_0}} \over e}$$ east,  $${{3m{a_0}} \over {e{v_0}}}$$ down
C
$${{m{a_0}} \over e}$$ west,  $${{2m{a_0}} \over {e{v_0}}}$$ up
D
$${{m{a_0}} \over e}$$ west,  $${{2m{a_0}} \over {e{v_0}}}$$ down
2
NEET 2013
MCQ (Single Correct Answer)
+4
-1
A current loop in a magnetic field
A
can be in equilibrium in two orientations, both the equilibrium states are unstable.
B
can be in equilibrium in two orientations, one stable while the other is unstable.
C
experiences a torque whether the field is uniform or non uniform in all orientations.
D
can be in equilibrium in one orientation.
3
NEET 2013
MCQ (Single Correct Answer)
+4
-1
A bar magnet of length $$'l'$$ and magnetic dipole moment 'M' is bent in the form of an arc as shown in figure. The new magnetic dipole moment will be

NEET 2013 Physics - Magnetism and Matter Question 36 English
A
$${2 \over \pi }M$$
B
$${M \over 2}$$
C
M
D
$${3 \over \pi }M$$
4
NEET 2013
MCQ (Single Correct Answer)
+4
-1
A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced e.m.f. is
A
four times per revoluation
B
six times per revolution
C
once per revolution
D
twice per revolution
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