4. A conductor is placed inside a non-constant electric field.

(A) The presence of the conductor zeroes out the electric field both inside and outside the conductor.

(B) The electric field outside the conductor is unaffected, but vanishes inside the conductor.

(C) The electric field inside the conductor will eventually become constant throughout the conductor but not necessarily 0, depending on how much charge is on the conductor surface.

(D) The electric field is 0 everywhere inside the conductor. Outside the conductor the electric field is distorted by the conductor.

(E) The conductor has no effect at all because it is not an insulator

96.77 amp

explanation:

rl = 250/100 = 2.5 ohms.

egl = 250 + (100 × 0.1) + 2 = 262 v.

at 700 r.p.m., eg2 = 262 × 700/1000 = 183.4 v.

if ia is the new current, then eg2 - 2 - (ia × 0.1) = 2.5 ia

which means this will give ia = 96.77 amp.

chemical energy --> gravitational potential energy --> kinetic energy --> elastic potential energy --> gravitational potential energy

explanation:

when emma starts the hike, the chemical energy stored in her body is used to climb up the mountain, and so she gains gravitational potential energy (because at the end, she will be at a higher height h above the ground). then she goes bungee jumping: as she falls, this gravitational potential energy is converted into kinetic energy (because her speed increases as she falls down), until the point when the rope stretches, and she stops moving. at that moment, all the kinetic energy is converted into elastic potential energy due to the stretching of the rope. then, this energy is released because the rope returns to its natural length, and emma gains a small increase in altitude , so she gains some gravitational potential energy.