1
NEET 2013
+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
AIPMT 2012 Mains
+4
-1
A proton carrying 1 MeV kinetic energy is moving in a circular path of radius R in uniform magnetic field. What should be the energy of an $$\alpha$$-particle to describe a circle of same radius in the same field?
A
2 MeV
B
1 MeV
C
0.5 MeV
D
4 MeV
3
AIPMT 2012 Prelims
+4
-1
A milli voltmeter of 25 milli volt range is to be converted into an ammeter of 25 ampare range. The value (in ohm) of neccessary shunt will be
A
0.001
B
0.01
C
1
D
0.05
4
AIPMT 2012 Prelims
+4
-1
Two similar coils of radius R are lying concentrically with their planes at right angles to each other. The currents flowing in them are $$I$$ and 2$$I$$, respectively. The resultant magnetic field induction at the centre will be
A
$${{\sqrt 5 {\mu _0}I} \over {2R}}$$
B
$${{\sqrt 5 {\mu _0}I} \over R}$$
C
$${{{\mu _0}I} \over {2R}}$$
D
$${{{\mu _0}I} \over R}$$
EXAM MAP
Medical
NEET