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A particle having the same charge as of electron moves in a circular path of radius 0.5 cm under the influence of magnetic field of 0.5T.  If an electric field of 100 V/m makes it to move in a straight path, then the mass of the particle is  (Given charge of electron=1.6 10−19C)

a.

2.0 10−24kg

b.

1.6 10−19kg

c.

1.6 10−27kg

d.

9.1 10−31kg



Question ID - 50187 | SaraNextGen Top Answer

A particle having the same charge as of electron moves in a circular path of radius 0.5 cm under the influence of magnetic field of 0.5T.  If an electric field of 100 V/m makes it to move in a straight path, then the mass of the particle is  (Given charge of electron=1.6 10−19C)

a.

2.0 10−24kg

b.

1.6 10−19kg

c.

1.6 10−27kg

d.

9.1 10−31kg

1 Answer
127 votes
Answer Key / Explanation : (a) -

 

mv= qBR  …(i)

Path is straight line

it qE = qvB

From equation (i) & (ii)

m=

m=2.0 10−24 kg

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