Answer Happy

Question 1 part 1 of 1 10 points A single circular loop of wire in the plane of the page is perpendicular to a uniform mag- netic field B directed into the page, as shown. B X X X x X X X X Ⓡ X B If the magnitude of the magnetic field is increasing, then the induced current in the wire loop is 1. directed upward out of the paper. 2. counterclockwise around the loop. 3. zero. (No current is induced.) 4. directed downward into the paper. 5. clockwise around the loop.
Question 7 part 1 of 1 10 points A circular coil of wire rests on your desk. A magnetic field is directed at right angles to the plane of your desk and passes through the coil. For a clockwise current (as you look down on your desk) to be generated, the magnetic field must be directed 1. upward away from the desk and be in- creasing in time. 2. upward away from the desk and be con- stant in time. 3. downward toward the desk and be con- stant in time. 4. downward toward the desk and be in- creasing in time.
Question 12 part 1 of 1 10 points In a model generator, a 470-turn rectangu- lar coil 0.074 m by 0.27 m rotates with an angular frequency of 12.7 rad/s in a uniform magnetic field of 0.66 T. What is the maximum emf induced in the coil? Answer in units of V. E SE
Question 23 part 1 of 1 10 points A mirrored surface is illuminated by a 428 mW laser with a beam diameter of 0.5 μm. The speed of light is 2.9979 x 108 m/s and the index of refraction is 1. What is the magnitude of the force on the mirrored surface? Answer in units of N.