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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A long vertical wire carrying a current of 10 A in the upward direction is placed in a region where a horizontal magnetic field of magnitude(2.0 × 10^−3) T exists from south to north. Find the point where the resultant magnetic field is zero.

A long vertical wire carrying a current of 10 A in the upward direction is placed in a region where a horizontal magnetic field of magnitude(2.0 × 10^−3) T exists from south to north. Find the point where the resultant magnetic field is zero.

A +6μC point charge is moving at a constant velocity of 8 × 10^6 m/s in the +y direction and (b) x=0 relative to a reference frame. At the instant when the point charge is at the origin of this reference frame what is the magnetic field vector it produces at the following points? (a) x = 0.500 m y = −0.500 m y = 0 z = 0