Question

practical based question of 2 marks from sound​

Answer 1

please mark me brainiest

Answer 2

Emf=Delta flux/Delta time.

Then,

B changes from 4 to 8 then,

In 2 sec,

Then flux=4×2,8×2.

Then Delta flux=16-8=8

Then Delta time =2 ;so 8/2=4v