A rectangular coil of 26 turns, 0.25 m by 0.41 m, is rotated at 68 rad/s in a magnetic field so that the axis of rotation is perpendicular to the direction of the field. The maximum emf induced in the coil is 0.2 V. What is the magnitude of the field

Answer: 1.4 seconds which is the third optionexplanation: current is defined as the flow of charge per timetherefore, the equation that relates current, charge and time can be expressed as follows: i = δq / δtwhere: i is the current given = 1.8 ampereδq is the charge given = 2.5 coulombδt is the time required for the flow of the given charges to give the 1.8 ampere.substitute with the givens in the above equation to get the time as follows: 1.8 = 2.5 / δtδt = 2.5 / 1.8 = 1.38888 which is approximately 1.4 secondshope this was !

The waves slow downn

The answer is ! 1

. we do not care the other details; the average velocity is only concerned with the  displacement rather than the  distance traveled. displacement is the change in position, or the "straight-line vector from the initial position to final position".