Figure P30.11 Sascha Hahn/Shutterstock

An aircraft, of wing span 38.7 m, flies horizontally at a speed of 900 km/h. If the angle of dip of the magnetic field lines of the Earth is 64 degrees with respect to the Earth surface, calculate the emf induced between the tips of the wings. Take the value of the horizontal component of the magnetic field of the Earth B=2×10−5B=2×10−5 T. Please remember to select the correct units.

Pulsars, or neutron stars, rotate at a fairly high speed, and they are surrounded by strong magnetic fields. The material in neutron stars is a good conductor, and hence a motional emf is induced between the center of the neutron star and the rim. Suppose that a neutron star of radius 12 km rotates at the rate of 35 rev/s and that the magnetic field has a strength of 1.00 x 108 T. What is the emf induced between the center of the star and a point on its equator?

A metal wheel with 8 metallic spokes, each 60 cm long is rotated at a speed of 100 rev./min in a plane perpendicular to earth magnetic field of 0.3 x10 T. Find the magnitude of the induced emf between the axle and the rim of the wheel.

A circular coil that has N = 120 turns and a radius of r = 12.0 cm lies in a magnetic field that has a magnitude of Во = 0.0630 T directed perpendicular to the plane of the coil. What is the magnitude of the magnetic flux B through the coil? B = 0.3418 The magnetic field through the coil is increased steadily to 0.165 T over a time interval of 0.280 s. What is the magnitude |Ɛ| of the emf induced in the coil during the time interval? |E| = 1.67 Incorrect T.m² V

A train travels at 4.5 m/s due east. Calculate the induced emf between the ends of a horizontal axle of the train which is 3.5 m long, assuming the vertical component of the Earth’s magnetic field strength is 6x10-5 T. Provide your answer in millivolts (mV).

(a) A 17.0 m long, thin, uniform steel beam slides south at a speed of 29.0 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 44.0 µT. What is the magnitude of the induced emf between the ends of the beam (in mV)? mV (b) What If? The west end of the beam impacts and sticks to a pylon, causing the beam to rotate clockwise 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