A particle of charge 16×10−18C moving with velocity 10m/s along the X-axis enters a region where a magnetic field of induction B is along the Y-axis, and an electric field of magnitude 10Vm−1 is along the negative Z-axis. If the charged particle continues moving along the X-axis, the magnitude of B is :

105Wb/m2

106Wb/m2

10−3Wb/m2

1Wb/m2

A

105Wb/m2

B

10−3Wb/m2

C

106Wb/m2

D

1Wb/m2

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Solution

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Since particle continues moving along X-axis, so there should be no force on the particle. Fnet=0 Felectic−Fmagnetic=0 qE=qvB E=vB 10=10×B

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