Prior to 1960, magnetic field strengths were usually measured by a rotating coil gaussmeter. This device used a small, multi-turn coil rotating at a high speed on an axis perpendicular to the magnetic field. The coil was connected to an ac voltmeter by means of slip rings. In one specific design, the rotating coil has 400 turns and an area of 1.4 cm2 . The coil rotates at 180 rev/min. If the magnetic field strength is 0.450T, find the maximum induced emf in the coil and the orientation of the normal to the plane of the coil relative to the field for which this maximum induced emf occurs.

3is a crest4 is a trough 2 is the amplitude 1 is the wavelength

From negative to negative

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction