Results of experiments on flux-flow resistivity (the relationship of v
oltage to current) of three high-temperature superconductors are descr
ibed. The superconductors are a melt-cast BSCCO 2212 rod, a single-fil
ament BSCCO powder-in-tube (PIT) tape, and a multifilament PIT tape. T
he flux-flow resistivity of those superconductors was measured at thre
e temperatures: 77 K (saturated liquid nitrogen), 87 K (saturated liqu
id argon), and 67 K (subcooled liquid nitrogen). Implications of the p
resent results for practical applications are discussed.