NEET 2013 | Moving Charges and Magnetism Question 38 | Physics

NEET 2013

MCQ (Single Correct Answer)

-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

$${{m{a_0}} \over e}$$ east, $${{3m{a_0}} \over {e{v_0}}}$$ up

$${{m{a_0}} \over e}$$ east, $${{3m{a_0}} \over {e{v_0}}}$$ down

$${{m{a_0}} \over e}$$ west, $${{2m{a_0}} \over {e{v_0}}}$$ up

$${{m{a_0}} \over e}$$ west, $${{2m{a_0}} \over {e{v_0}}}$$ down

AIPMT 2012 Mains

MCQ (Single Correct Answer)

-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?

2 MeV

1 MeV

0.5 MeV

4 MeV

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

An alternating electric field, of frequency $$v$$, is applied across the does (radius = R) of a cyclotron that is being used to accelerate protons (mass = m). The operating magnetic field (B) used in the cyclotron and the kinetic energy (K) of the proton beam, produced by it, are given by

$$B = {{m\upsilon } \over e}$$ and $$K = 2m{\pi ^2}{\upsilon ^2}{R^2}$$

$$B = {{2\pi m\upsilon } \over e}$$ $$K = {m^2}\pi \upsilon {R^2}$$

$$B = {{2\pi m\upsilon } \over e}$$ $$K = 2m{\pi ^2}{v^2}{R^2}$$

$$B = {{m\upsilon } \over e}$$ $$K = {m^2}\pi \upsilon {R^2}$$

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-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

$${{\sqrt 5 {\mu _0}I} \over {2R}}$$

$${{\sqrt 5 {\mu _0}I} \over R}$$

$${{{\mu _0}I} \over {2R}}$$

$${{{\mu _0}I} \over R}$$

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Human Health and Diseases Body Fluids and Its Circulation Locomotion and Movement Neural Control and Coordination Reproduction in Organisms Reproductive Health Structural Organisation in Animals Digestion and Absorption Excretory Products and Their Elimination Chemical Coordination and Integration Human Reproduction Animal Kingdom Breathing and Exchange of Gases Evolution