A horizontal telephone wire 1 km long is lying along east-west in earth's magnetic field. If falls freely to the ground from a height of 10 m. Calculate the e.m.f. induced in the wire on striking the ground. Given horizontal component of earth's field is 0.32 gauss.

A horizontal telephone wire 10^(3) m long is lying along east west in earth's magnetic field. It falls freely to the ground from a height of 10m. The emf induced in the wire when the wire strikes emf induced in the wire when the wire strikes the ground will be (B_(H)=0.32xx10^(-4)T,g=9.8m//s^(2))

A wheel with 15 metallic spokes each 60 cm long is roated at 360 rpm in a plane normal to the horizontal component of earth's magnetic field. The angle of dip at that place 60^(@) . If the e.m.f. induced between the rim of the wheel and the axle is 400 m mV, calculate horizontal component of earth's magnetic field at the place. How will the induced e.m.f. change. if number of spokes is increased ?

The horizontal telegraph wire 100 m long, oriented along magnetic east west falls freely under gravity to the ground with a speed of 20 cm/s. the horizontal component of earth's magnetic field is 4.0xx10^(-5) tesla. The emf induced in the wire at the instant, the wire strikes the gound is

A horizontal wire 20 m long extending from east to west is falling with a velocity of 10 m/s normal to the Earth s magnetic field of 0.5 xx 10^-4 T . What is the value of induced emf in the wire?

The horizontal telegraph wire 100m long,oriented along magnetic east west falls freely under gravity to the ground with a speed of 20 cm/s. The horizontal component of earth's magnetic field is 4.0 xx 10^-5 tesla. Find the e.m.f. induced in the wire at the instant the wire strikes the ground.

A satellite with a 40 cm long copper wire on its bottom is revolving around the earth at 7.8 km per second, such that the wire is perpendicular to the vertical component of earths' magnetic field. Determine the e.m.f. induced across this wire, if the magnitude of the vertical component of magnetic field is 0.2 gauss.

A horizontal wire 0.8 m long is falling at a speed of 5 m//s perpendicular to a uniform magnetic field of 1.1 T , which is directed from east to west. Calculate the magnitude of the induced ernf. Is the north or south end of the wire positive?

A horizontal wire 0.8 m long is falling at a speed of 5 m//s perpendicular to a uniform magnetic field of 1.1 T , which is directed from east to west. Calculate the magnitude of the induced ernf. Is the north or south end of the wire positive?