(a) Formal exceptions to rulings or orders of the court are unnecessary. For all purposes for which an exception has heretofore been necessary, it is sufficient that a party, at the time the ruling or order of the court is made or sought, makes known to the court the action which he desires the court to take or his objection to the action of the court and his grounds therefor; and, if a party has no opportunity to object to a ruling or order at the time it is made, the absence of an objection does not thereafter prejudice him.

(b) When motion for mistrial or other like relief is made, the question is thereby presented as to whether the moving party is entitled to the relief therein sought or to any lesser relief, and where such motion is denied in whole or in part, it shall not be necessary that the moving party thereafter renew his motion or otherwise seek further ruling by the court.