Exam 32: Maxwells Equations; Magnetism of Matter

Suppose you are looking into one end of a long cylindrical tube in which there is a uniform electric field, pointing away from you. If the magnitude of the field is decreasing with time the field lines of the induced magnetic field are:

A small bar magnet is suspended horizontally by a string. When placed in a uniform horizontal magnetic field, it will:

The magnetic dipole moment of an atomic electron is typically:

A 0.70-m radius cylindrical region contains a uniform electric field that is parallel to the axis and is increasing at the rate 5.0 * 10¹² V/m . s. The magnetic field at a point 1.2 m from the axis has a magnitude of:

A cylindrical region contains a uniform electric field that is along the cylinder axis and is changing with time. If r is the distance from the cylinder axis the magnitude of the magnetic field within the region is:

An unmagnetized steel bar is placed inside a solenoid. As the current in the solenoid is slowly increased from zero to some large value, the magnetization of the bar:

The molecular theory of magnetism can explain each of the following EXCEPT:

The magnetic field of Earth is roughly the same as that of a magnetic dipole with a dipole moment of about:

The soft iron core in the solenoid shown is removable. Then:

Because ferromagnets exhibit hysteresis, the magnetization:

The statement that magnetic field lines form closed loops is a direct consequence of:

The magnetic properties of materials stem chiefly from:

One of the Maxwell equations begins with .... The "o" symbol in the integral sign means:

Displacement current exists in the region between the plates of a parallel plate capacitor if:

A paramagnetic substance is placed in a weak magnetic field and its absolute temperature T is increased. As a result, its magnetization:

When a permanent magnet is strongly heated:

Which of the following equations, along with a symmetry argument, can be used to calculate the electric field produced by a uniform time-varying magnetic field?

A 1.2-m radius cylindrical region contains a uniform electric field along the cylinder axis. It is increasing uniformly with time. To obtain a total displacement current of 2.0*10 ^{- 9} A through a cross section of the region, the magnitude of the electric field should change at a rate of:

Of the three chief kinds of magnetic materials (diamagnetic, paramagnetic, and ferromagnetic) which are used to make permanent magnets?

One of the Maxwell equations begins with .... The symbol " " means: