Author Question: Consider two copper wires. One has twice the cross-sectional area of the other. How do the ... (Read 31 times)

ishan · **on:** Jul 29, 2018

Consider two copper wires. One has twice the cross-sectional area of the other. How do the resistances of these two wires compare?

A)

Both wires have the same resistance.
B)

The thicker wire has half the resistance of the shorter wire.
C)

The thicker wire has twice the resistance of the shorter wire.
D)

none of the given answers

Question 2

If the current increases in a solenoid, the induced emf acts to

A)

decrease the flux.
B)

increase the flux.
C)

first increase then decrease the flux.
D)

first decrease then increase the flux.
E)

have no effect on the flux.