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Sahay Sir > Question Answers > Cengage NEET by C.P Singh > Part 2 > Chapter 5 - Magnetic Field > A battery is connected between two points A and B on the circumference of a uniform conducting ring of radius r and resistance R. One of the arcs AB of the ring subtends an angle θ at the centre. The value of the magnetic induction at the centre due to the current in the ring is

A battery is connected between two points A and B on the circumference of a uniform conducting ring of radius r and resistance R. One of the arcs AB of the ring subtends an angle θ at the centre. The value of the magnetic induction at the centre due to the current in the ring is

A vertical wire carries a current upward. The magnetic field at a point due north of the wire will be directed: