A uniform magnetic field is directed along the x axis. For what orientation of a flat, rectangular coil is the flux through the rectangle a maximum?
1.It is a maximum in the xy plane.
2.It is a maximum in the xz plane.
3.It is a maximum in the yz plane.
4.The flux has the same nonzero value for all these orientations.
5.The flux is zero in all cases.
3
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A parallel plate capacitor with circular plates having radius 0.07 m is used to store energy. If it is desired to store 
in this capacitor, what must the separation distance be for a voltage of 1.5 kV?
A. 0.64 cm B. 0.41 cm C. 2.5 cm D. 1.3 cm
A long 1-cm-diameter electric copper cable is embedded in the center of a 25 cm square concrete block. If the outside temperature of the concrete is 25°C and the rate of electrical energy dissipation in the cable is 150 W per meter length, determine the temperatures at the outer surface and at the center of the cable.
GIVEN
FIND
The temperatures at the outer surface (Ts) and at the center of the cable (Tc)
ASSUMPTIONS
Two dimensional, steady state heat transfer
Uniform thermal conductivities
SKETCH
The lowest-strength direction and loading for a uniaxial-fiber reinforced composite materials is
(a) In the fiber plane shear (b) Axial compression (c) Transverse tension (d) Transverse compression
The dielectric constant of a vacuum is
A) zero. B) 8.99 × 109. C) o. D) 1000. E) 1.000.