Short Quiz

Two identical conductors 1 and 2 are placed on two frictionless conducting rails R and S in a uniform magnetic field directed vertically downward into the plane of the page. If conductor 1 is moved with a constant velocity in the direction as shown in figure, the force on conductor 2 will be along :

A metallic rod of 1 m length is rotated with a frequency of 40 rev/s, with one end hinged at the centre and the other end at the circumference of a circular metallic ring of radius 1 m, about an axis passing through the centre and perpendicular to the plane of the ring. A constant and uniform magnetic field of 0·5 T parallel to the axis is present in the region. The value of emf induced between the centre and the metallic ring is close to :

Assertion (A) : Induced emf produced in a coil will be more when the magnetic flux linked with the coil is more.

Reason (R) : Induced emf produced is directly proportional to the magnetic flux.

A square loop of side 0·50 m is placed in a uniform magnetic field of 0·4 T perpendicular to the plane of the loop. The loop is rotated through an angle of 60° in 0·2 s. The value of emf induced in the loop will be :