The jurors so empaneled shall be sworn or shall affirm in substance as follows: “You do solemnly swear (or affirm) that you will well and truly ascertain and determine whether it is necessary to take for public use the absolute title in fee to the private property which the petition describes and prays may be taken for such public use, and if you determine that it is necessary to take the absolute title in fee to such private property for public use, that then you ascertain, determine and award the just compensation to be made therefor, and faithfully and impartially discharge all other duties as devolve upon you in this case, and unless discharged by the court a true verdict give according to the law and the evidence, so help you God, (or under the pains and penalties of perjury).” The jury shall hear the proofs and allegations of the parties and, if so ordered by the court, shall go to the place where the public utility sought to be taken for public use is situated, in the charge of an officer. They shall be instructed as to their duties and the laws of the case by the judge of the court and shall retire under the charge of an officer and render their verdict in the same manner as on the trial of an ordinary civil case, but the same shall be in writing and be signed by the foreman or by all the jurors.