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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2013
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Q)

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 $3a_0$ toward west. The electric and magnetic fields in the room are -


( A ) $\frac{ma_0}{e} east , \frac{3 ma_0}{ev_0} down$
( B ) $\frac{ma_0}{e} west, \frac{2ma_0}{ev_0} up$
( C ) $\frac{ma_0}{e} east , \frac{3 ma_0}{ev_0} up$
( D ) $\frac{ma_0}{e} west, \frac{2ma_0}{ev_0} down$

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