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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 a magnetic field of 0.5 T. 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 –19 C)

1. 1.6 × 10 –19 kg
2. 1.6 × 10 –27 kg
3. 9.1 × 10 –31 kg
4. 2.0 × 10 –24 kg

Correct answer: 2.0 × 10 –24 kg

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