A 1.75 m length of wire is held in an east–west direction and moves horizontally to the north with a speed of 14.9 m/s. The vertical component of Earth's magnetic field in this region is 40.0 ?T directed downward. Calculate the induced emf between the ends of the wire and determine which end is positive. magnitude ?? mV

A strong electromagnet produces a uniform magnetic field of 1.60 T over a cross-sectional area of 0.200 m2. A coil having 200 turns and a total resistance of 20.0 Q is placed around the electromagnet. The current in the electromagnet is then smoothly reduced until it reaches zero in 20.0 ms. What is the current induced in the coil?

A 34-turn circular coil of wire has diameter 0.92 m. It is placed with its axis along the direction of the Earth's magnetic field of 41.0 µT and then in 0.200 s is flipped 180°. An average emf of what magnitude is generated in the coil?

A 13.0 m long, thin, uniform steel beam slides north at a speed of 20.0 m/s. The length of the beam maintains an east-west orientation while sliding. The vertical component of the Earth's magnetic field at this location has a magnitude of 48.0 µT. What is the magnitude of the induced emf between the ends of the beam (in mV)? mV What If? The west end of the beam impacts and sticks to a pylon, causing the beam to rotate counterclockwise as viewed from above. While the beam rotates, what is the magnitude of the induced emf between the ends of the beam (in mV)? (Hint: use conservation of angular momentum to find the speed of the beam after the collision.) mV