In a certain region static electric and magnetic fields exist. The magnetic field is given by B^{\to}=B_0(i^{∧}+2j^{∧}-4k^{∧}).If a test charge moving with a velocity \upsilon^{\to}=\upsilon_0(3i^{∧}-j^{∧}+2k^{∧}) experiences no force in that region, then the electric field in the region, in SI units, is : [Main 8 April 2017]

Correct Answer is : →E=−υ0B0(14∧j+7∧k)

E^{\to}=-\upsilon_0B_0(3i^{∧}-2j^{∧}-4k^{∧})

E^{\to}=-\upsilon_0B_0(i^{∧}+j^{∧}+7k^{∧})

E^{\to}=\upsilon_0B_0(14j^{∧}+7k^{∧})

E^{\to}=-\upsilon_0B_0(14j^{∧}+7k^{∧})

JEE Main 8 April 2017 Paper Solved Paper

Section: Physics

Question : 18 of 90

Marks: +1, -0

In a certain region static electric and magnetic fields exist. The magnetic field is given by

→

=B0(

∧

−4

∧

).If a test charge moving with a velocity

→

=υ0(3

∧

−

∧

) experiences no force in that region, then the electric field in the region, in SI units, is :

[Main 8 April 2017]

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