2. A long wire carrying 4.5 A of current makes two 90° bends, as shown below. The bent part of the wire passes through a 0.24 T magnetic field pointing in the +z-direction (out of the page) and confined to a limited region of space. The magnitude and direction of the magnetic field are constant within the indicated region. The magnetic field is zero outside of the region. Magnetic field region y 4.50 Ai 30,0 cm 60.0 cm Find the force that the magnetic field exerts on the wire. B 60.0 cm

It is not 3.807e-3

1. A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. What is the magnitude of the magnetic field B at the centre of the coil?

5. A proton (m₂ = 1.67 x 10-27 kg; e = 1.60 x 10-19 C) enters a 14 T field in a direction par- allel to the direction of the magnetic field. The proton is moving at 105 m/s. What is the mag- nitude of the force felt on the proton?

1. The figure below shows the end-on view of a hollow cylindrical conductor. A current of 80.0 A is directed out of the page along the axis of the cylinder and is uniformly distributed over a cross section. Determine the magnitude of the magnetic field at a distance of (a) 0.500 mm, (b) 2.00 mm, and (c) 4.00 mm from the axis of the conductor. 3.00 mm 1.00 mm conductor