(a) Principle and working
(b) Two values each, displayed by
(i) Ram
(ii) School teacher
(a) Principle:
Whenever a coil is rotated in a magnetic field, an emf is induced in it due to the change in magnetic flux linked with it.
Working-
As the coil rotates, its inclination (θ) with respect to the field changes. Hence sinusoidal/varying emf (= e0 sin ωt) is obtained. May also be explained graphically.
(b) Values :
Ram-scientific aptitude, curiosity, keenness to learn, positive approach, etc.
Teacher-Dedication, concern for students, depth of knowledge, generous, positive attitude towards queries, motivational approach.