An $α$ particle is moving in a magnetic field of induction 0.4T with a velocity of $10^{5} m s^{- 1}$ describing a circle of radius r. A proton travelling with same speed in same direction in the same field will describe a circle of radius

r/4

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r/2

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Solution

The correct option is B r/2

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An α particle is moving in a magnetic field of induction 0.4T with a velocity of 105ms−1 describing a circle of radius r. A proton travelling with same speed in same direction in the same field will describe a circle of radius

The correct option is B r/2

An $α$ particle is moving in a magnetic field of induction 0.4T with a velocity of $10^{5} m s^{- 1}$ describing a circle of radius r. A proton travelling with same speed in same direction in the same field will describe a circle of radius