A certain galvanometer needle deflects 30 degrees when the current through the coil is 6x10^-6 A. What deflection would be produced by the same current if the magnetic field were decreased to 2/3 of it's original value?

Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.

Multiply or divide to make this english distance conversion. 174 inches = feet (14.5, 58, 2,088, 23)

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?