When a Given Torque Is Applied to a 1-M Long

Multiple Choice

When a given torque is applied to a 1-m long copper wire, the end rotates by 10°. If half the torque were applied to a 2-m long length of the same wire, by what angle would the end rotate?

A) 5 degrees.
B) 7.1 degrees.
C) 10 degrees.
D) 14.1 degrees.
E) 20 degrees.