“Kirchhoff’s” law is preferred over Ohm’s law. Why? Can we apply Kirchhoff’s law to both a.c. and D.C.? Kirchhoff’s laws are related to certain conservation laws. Explain? “Wheatstone bridge method of determination of resistance is considered to be more accurate than the voltmeter-ammeter method”. Why? When the Wheatstone bridge most sensitive? Wheatstone bride is not suitable for measuring very low and very high resistances. Why? A meter bridge wire is called a slide wire bridge. Why? It is better to get null deflection at the middle of the wire in a meter bridge. Why? What is meant by end correction for the meter bridge? How it can be reduced? What is potentiometer? What is its principle? What is potential gradient? What is the significance of it? Why it should be small for more accurate measurement? The potentiometer wire should be long and of uniform thickness. Why? The sensitivity of potentiometer wire can be increased by increasing its length. But we are usually sat
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