In the following `'I'` refers to current and other symbols have their usual meaning. Chosse the option that corresponds to the dimensions of electrical conductivity:

In the following 'I' refers to current and other sumbols have their usual meaning . Choose the option that corresponding to the dimensions of electrical conductivity :

Which of the following formula is correct ? [ Where symbols have their usual meaning ]

Which of the following formula is correct ? [ Where symbols have their usual meaning ]

Show that beta=2prop where symbols have their usual meaning.

Derive vecF = mvec a where the symbols have their usual meanings.