Multiple Choice
Two conductors are made of the same material and have the same length. Conductor A is a solid wire of diameter 1 m. Conductor B is a hollow tube of inside diameter 1 m and outside diameter 2 m. The ratio of their resistance, RA/RB, is:
A) 1
B)
C) 2
D) 3
E) 4
Correct Answer:

Verified
Correct Answer:
Verified
Q5: Energy may be measured in:<br>A)kilowatt<br>B)joule·second<br>C)watt<br>D)watt·second<br>E)volt/ohm
Q12: A current of 0.3 A passes through
Q16: The units of resistivity are:<br>A)ohm<br>B)ohm·meter<br>C)ohm/meter<br>D)ohm/meter<sup>2</sup><br>E)none of these
Q23: For a cylindrical resistor made of ohmic
Q23: If is the current density and is
Q30: A certain wire has resistance R.Another wire,
Q42: For an ohmic substance, the electron drift
Q43: Five cylindrical wires are made of the
Q45: A certain sample carries a current
Q46: Conductivity is:<br>A)the same as resistivity, it