Final answer:
The right to a trial by jury places limits on the monarch by making them subject to the law and ensuring that jury decisions cannot be easily overridden, as reinforced by the Magna Carta and the Seventh Amendment of the U.S. Constitution.
Step-by-step explanation:
The right to a trial by jury limits the monarch's power by insisting that monarchs can be subjected to a jury trial. This principle stems from historical documents like the Magna Carta, which emphasized that all people, including the king, are subject to the law.
The inclusion of jury trials in legal processes is also enshrined in the Seventh Amendment of the U.S. Constitution, indicating that no fact tried by a jury can be otherwise re-examined in any court other than according to the rules of common law. This protects the decisions made by a jury from being overridden by judges, thus limiting any potential for unrestrained judicial or monarchic power. The Sixth Amendment also solidifies the importance of an impartial jury, further ensuring that the monarch does not have unlimited power in legal matters.