A0.8 m length of wire is formed into a single turn, square loop in which there is a current of 12 a. the loop is placed in magnetic field of 0.12 t, which is perpendicular to a normal to the loop plane. what is the maximum torque that the loop can experience?

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?