In the previous question,
(i) the force on `T` is proportional to `i`
(ii) the force `T` is proportional to `i^(2)`
(iii) if direction of `I` is reversed in the circuit be reversing `E`, the force on `T` will remain in the same direction

Options

A. (i), (ii)
B. (ii), (iv)
C. (ii), (iii)
D. (i), (iv)

Answer

B

Explanation

`B prop i, F_(m) prop i^(2)`
`vec(F)_(m) = i(-l hat(j) xx -B hat(k)) = i l B hat(i)`