# A particle of mass m and charge q moving with velocity v enters Region-2 normal to the boundary as shown in the figure. Region-2 has uniform magnetic field B perpendicular to the plane of the paper. The length of the Region-2 is l.Choose the correct choice. A.     The particle enters Region-3 only if its velocity v>q l B/m. B.    The particle enters Region-3 only, if its velocity v<q l B/m. C.    Path length of the particle in Region-2 is maximum when velocity v =q l B/m. D.    Time spend in Region-2 is same for any velocity v as long as the particle return to Region-1. (a) (b) A, C true (c) (d) All are true

## Question ID - 154087 :- A particle of mass m and charge q moving with velocity v enters Region-2 normal to the boundary as shown in the figure. Region-2 has uniform magnetic field B perpendicular to the plane of the paper. The length of the Region-2 is l.Choose the correct choice. A.     The particle enters Region-3 only if its velocity v>q l B/m. B.    The particle enters Region-3 only, if its velocity v<q l B/m. C.    Path length of the particle in Region-2 is maximum when velocity v =q l B/m. D.    Time spend in Region-2 is same for any velocity v as long as the particle return to Region-1. (a) (b) A, C true (c) (d) All are true

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A uniform magnetic filed T exists in a circular region of radius m. A loop of radius m encloses the magnetic filed at and then pulled at uniform speed m/s in the plane of the paper. Find the induced emf (in V) in the loop at time s  