An air core toroid with 10turns/cm carries a current of 1 mili ampere. The intensity of magnetic field inside it in Weber/m² will be???

Dear student,

The question does not posses enough information to answer the question.

The magnetic field passing through the toroid can be found out by
But to find out the intensity of the magnetic field, or in other words, flux passing through it, we need to know the area of cross section of the toroid.