Question

Q.5) Explain principle of potentiometer?
Q.6) What are conditions for obtaining good interference pattern.
Q.7) A parallel plate capacitor has an area 4cm² and a plate seperatic​

Answer 1

5.The principle of a potentiometer is that the potential dropped across a segment of a wire of uniform cross-section carrying a constant current is directly proportional to its length. The potentiometer is a simple device used to measure the electrical potentials (or compare the e.m.f of a cell).

6.To set up a stable and clear interference pattern, two conditions must be met: The sources of the waves must be coherent, which means they emit identical waves with a constant phase difference. The waves should be monochromatic - they should be of a single wavelength.