A material is a good conductor because it
A)
has numerous free electrons.
B)
has unattached protons.
C)
is not an insulator.
D)
is an insulator.
E)
is a metal.
A
You might also like to view...
A glowing blackbody that appears bluish in color is __________ than one that appears reddish
Fill in the blank(s) with correct word
A 7.5 × 1014 Hz laser emits a 7.7-?s pulse, 5.0 mm in diameter, with a beam energy density of 0.51 J/m3
What is the amplitude of the electric field of the emitted waves? (c = 3.00 × 108 m/s, ?0 = 4? × 10-7 T ? m/A, ?0 = 8.85 × 10-12 C2/N ? m2) A) 120 kV/m B) 340 kV/m C) 480 kV/m D) 240 kV/m E) 150 kV/m
At what rate is power supplied by the 10-V emf shown below?
a.
?10 W
b.
+10 W
c.
zero
d.
+20 W
e.
?20 W
Superconductors are noted for their
A) high electric resistance. B) low electric resistance. C) absence of electric resistance. D) low cost. E) bright colors.