12) A rod PQ of length 2 is rotating about one end P in a uniform magnetic field B which is perpendicular to the plane of rotation of the rod . Point M is the mid point of the rod. Find the induced between M & Q if that between P & Q = 100V.
induced emf for rotating rod is given by:- [1/2*mag. field(B)*angular velocity*square of length(L^2)]
in the given question, the emf for full length is given, i.e 100V and we have to calculate the emf for half of the length. just, in the above formula put L as (L/2). which when squared gives one-fourth(1/4) of induced emf.
So, the induced emf for half length is 1/4 of induced emf as that for full length.
So, the answer 25V.
in the given question, the emf for full length is given, i.e 100V and we have to calculate the emf for half of the length. just, in the above formula put L as (L/2). which when squared gives one-fourth(1/4) of induced emf.
So, the induced emf for half length is 1/4 of induced emf as that for full length.
So, the answer 25V.