In the diagram below, a rectangular 40 loop coil of width w=10 cm and length l= 14 cm begins in a region with no electric field and then moves to be completely inside a region of uniform B=1.3 T coming out of the page. If this process occurs over a time period of 3 s, what is the magnitude of the induced emf in the coil of wire? a) 0 V b) 0.0061 V c) 0.243 V

A large power plant generates electricity at 12.0 kV. Its old transformer once converted the voltage to 360 kV. The secondary coil of this transformer is being replaced so that its output can be 770 kV for more efficient cross-country transmission on upgraded transmission lines.Randomized Variables V1 = 360 kVV2 = 770 kV a) What is the ratio of turns in the new secondary to the number of turns in the old secondary?  b) What is the ratio of new current output to the old current output for the same power input to the transformer?  c) If the upgraded transmission lines have the same resistance as the original ones, what is the ratio of new line power loss to the old?

A 75 turn, 10.0 cm diameter coil rotates at an angular velocity of 8.00 rad/s in a 1.40 T field, starting with the normal of the plane of the coil perpendicular to the field. Assume that the positive max emf is reached first. a)What (in V) is the peak emf? b) At what time (in s) is the peak emf first reached? c) At what time (in s) is the emf first at its most negative? and d) What is the period (in s) of the AC voltage output?

Suppose the 50 turn coil in the figure below lies in the plane of the page and originally has an area of 0.230 m². It is stretched to have no area in 0.100 s. X Bin XBin X V What is the direction? clockwise X counterclockwise X X What is the magnitude (in V) of the average value of the induced emf if the uniform magnetic field points into the page and has a strength of 1.75 T? X X 192 X