1
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
A long straight wire carries a certain current and produces a magnetic field 2 $$ \times $$ 10$$-$$4 Wb m$$-$$2 at a perpendicular distance of 5 cm from the wire. An electron situated at 5 cm from the wire moves with a velocity 107 m/s towards the wire along perpendicular to it. The force experienced by the electron will be (charge on electron 1.6 $$ \times $$ 10$$-$$19 C)
A
3.2 N
B
3.2 $$ \times $$ 10$$-$$16 N
C
1.6 $$ \times $$ 10$$-$$16 N
D
zero
2
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
A circular coil ABCD carrying a current 'i' is placed in a uniform magnetic field. If the magnetic force on the segment AB is $$\overrightarrow F $$, the force on the remaining segment BCDA is

NEET 2013 (Karnataka) Physics - Moving Charges and Magnetism Question 57 English
A
$$ - \overrightarrow F $$
B
$$3\overrightarrow F $$
C
$$-$$$$3\overrightarrow F $$
D
$$\overrightarrow F $$
3
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
4
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+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
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