A resistor and an inductor are connected in series to a battery. The battery is suddenly removed from the circuit. The time constant for of the circuit represents the time required for the current to decrease to
A)
25 of the original value.
B)
37 of the original value.
C)
50 of the original value.
D)
63 of the original value.
E)
75 of the original value.
Question 2
A two-dimensional object placed in the xy-plane has three forces acting on it: a force of 3.0 N along the x-axis acting at a point (3 m, 4 m);
A force of 2.0 N along the y-axis acting at (-2 m, 5 m); and a force of 5 N in the negative x direction acting at (-2 m, -3 m). What is the net torque about the point (-1 m, 1 m)?
A)
7 N m counterclockwise
B)
23 N m clockwise
C)
3 N m counterclockwise
D)
31 N m clockwise
E)
7 N m clockwise