A particle having a mass of 10^{-2} kg carries a charge of 5\times10^{-8}C.The particle is given an initial horizontal velocity of 10^5ms^{-1} in the presence of electric field E^{\to} and magnitude field B^{\to}. To keep the particle moving in a horizontal direction, it is necessary that (1) B^{\to} should be perpendicular to the direction of velocity and E^{\to} should be along the direction of velocity. (2) Both B^{\to} and E^{\to} should be along the direction of velocity. (3) Both B^{\to} and E^{\to} are mutually perpendicular and perpendicular to the direction of velocity. (4) B^{\to} should be along the direction of velocity and E^{\to} should be perpendicular to the direction of velocity Which one of the following pairs of statements is possible? (2010 Mains)

Correct Answer is : (2) and (3)

Class 12 NEET Physics Moving Charges and Magnetism

Question : 55 of 100

Marks: +1, -0

A particle having a mass of 10−2 kg carries a charge of 5×10−8C.The particle is given an initial horizontal velocity of 105ms−1 in the presence of electric field

→

and magnitude field

→

. To keep the particle moving in a horizontal direction, it is necessary that
(1)

→

should be perpendicular to the direction of velocity and

→

should be along the direction of velocity.
(2) Both

→

and

→

should be along the direction of velocity.
(3) Both

→

and

→

are mutually perpendicular and perpendicular to the direction of velocity.
(4)

→

should be along the direction of velocity and

→

should be perpendicular to the direction of velocity
Which one of the following pairs of statements is possible?

(2010 Mains)

(1) and (3)
(3) and (4)
(2) and (3)
(2) and (4)

Validate

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