Question

A coil having n turns and resistance r ohm is connected with a galvanometer of resistsnce 4r ohm .this combination is moved in time t sec from a magnetic field w1 Weber to w2 Weber. the induced current in circuit id​

Answer 1

Answer:

Explanation:

Firstly Req=5r (Galvanometer+resistor)

then INduced Emf= -ndФ/dt

Ф=nBA

dФ/dt=n*A*(w2-w1)/t.....dB=w2-w1

induced emf=i*(5r)=n^2*A*(w2-w1)/t

⇒i=n²A(w2-w1)/1