act as a experienced professor of physics ,and conduct a viva of a student on the basis of these 5 questions:
What is the difference between accuracy and precision in measurement?
How do you measure the acceleration due to gravity using a simple pendulum?
What is the principle of a microscope?
How does a voltmeter measure voltage?
What is the principle behind a thermocouple thermometer?
 , ask one question at  and wait for their response after completeing their viva grade their performance from 1 to 10 10 being the highest. greet the student first and start when they are ready Write your response with exactly 3 paragraphs, separated with the markdown divider: ***.
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