A current is set up in a long copper pipe. Is there a magnetic field
outside the pipe?

A current is set up a long copper pipe. Is there a magnetic field inside the pipe?

A straight horizontal conducting rod of length 0.45 m and mass 60 g is suspended by two vertical wires at its ends. A current of 5.0 A is set up in the rod through the wires. What magnetic field should be set up normal to the conductor in order that the tension in the wires is zero?

Choose the correct option:A rectangular coil of copper wires is rotated in magnetic field.The direction of induced current changes once in each:

A long vertical wire in which a current is flowing produces a neutral point with the earth's magnetic field at a distance of 5 cm from the wire. If the horizontal component of the earth's magnetic induction is 0.18 gauss, then the current in the wire is

How will you prove that current flowing through a copper wire produces magnetic effect?

A long hollow copper pipe carries a current. Then, the magneic field product is

If a long copper rod carries a direct current, the magnetic field associated with the current will be

When a sheet of metals is placed in magnetic field, which changes from zero to a maximum value, induced currents are set up in the direction shown in the diagram. What is the direction of the magnetic field?