What is the duty of the trial court to help the jury understand the legal principles it is asked to apply?

When a defendant makes a mid-trial motion to revoke his self represented status and have standby counsel appointed for the remainder of the trial, does the trial court have a duty to manage the trial? (California, United States of America)

In a motion for a new trial, is the trial court bound by the same principles as the court of appeal? (California, United States of America)

Whether a court's ruling is based on oral testimony or written declarations, when conflicting inferences can reasonably be drawn from the facts, can the appellate court defer to the trial court's factual determinations? (California, United States of America)

When a factual determination is challenged by an appellate court on the grounds that there is no substantial evidence to sustain it, can the appellate court substitute its deductions for those of the trial court? (California, United States of America)

On appeal from the denial of a motion for acquittal, does the reviewing court apply the same standard as the trial court? (California, United States of America)

What is the duty of a trial court to instruct a jury on the general principles of law relevant to the issues raised by the trial? (California, United States of America)

What is the test for determining whether the trial court applied the correct legal standard? (California, United States of America)

What is the standard of review applied by appellate courts to a decision by a trial court to instruct or not to instruct a jury? (California, United States of America)

What are the principles of a motion for a new trial where a witness in a murder trial later dies before the trial has even begun? (California, United States of America)

What are the findings of a jury in a sexual assault trial where the trial court repeatedly asked more questions than were necessary? (California, United States of America)