in terms of electromagnetic induction, why does voltage cancel out if a circuit is going through a magnetic field? (note: we haven't learnt about magnetic flux or anything similar)

Anybody wanna ? (picture included? )

What will a positive and a negative charge do if they are separated from each other?

Aturntable a is built into a stage for use in a theatrical production. it is observed during a rehearsal that a trunk b starts to slide on the turntable 10 s after the turntable begins to rotate. knowing that the trunk undergoes a constant tangential acceleration of 0.31 m/s2, determine the coefficient of static friction between the trunk and the turntable.