An aircraft executes a horizontal loop at a speed of 720 km/h with its wings banked at `15^(@)` . What is the radius of the loop ?

The magnetic field due to a current carrying circular loop of radius 3 cm at a point on the axis at a distance of 4 cm from the centre is 54muT . What will be its value at the centre of the loop ?

A jet airplane travelling at the speed of 500 km h^(-1) ejects its products of combustion at the speed of 1500 km h–1 relative to the jet plane. What is the speed of the latter with respect to an observer on the ground ?

An aeroplane is travelling at the speed of 360 km//hr along the horizontal to the earth surface'. What is the induced potential developed between the ends of th'e wing 5 m long, if the earth’s magnetic field at the location has-a magnitude of 4 xx 10^-4 wb//m^2 and dip angle is 30^@ ?

A man walks on a straight road from his home to a market 2.5 km away with a speed of 5 km. h^(-1) . Finding the market closed he instantly turns and walks back home with a speed of 7.5 km. h^(-1) . What is the (a) magnitude of average velocity and