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JEE Main2019Physics
Q.

In an experiment, electrons are accelerated, from rest, by applying a voltage of 500 V. Calculate the radius of the path if a magnetic field 100 mT is then applied. [Charge of the electron = 1.6 × 10–19 C, Mass of the electron = 9.1 × 10–31 kg] 

  1. A

    7.5 × 10–3 m

  2. B

    7.5 m

  3. C

    7.5 × 10–2 m

  4. D

    7.5 × 10–4 m

Solution

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