Kirchhoff's law

Q1.State Kirchhoff’s Current Law

Kirchhoff’s Current Law states that the total current entering a junction or a node equals the charge leaving the node as no charge is lost.

Q2.What is Kirchhoff’s First Law also known as?

Kirchhoff’s First Law is also known as Kirchhoff’s Current Law.

Q3.State Kirchhoff’s voltage law

Kirchhoff’s voltage law states that the voltage around a loop equals the sum of every voltage drop in the same loop for any closed network and equals zero.

Q4.Who put forth Kirchhoff’s laws?

Kirchhoff’s laws were put forth by Gustav Robert Kirchhoff

Q5.Kirchhoff’s second law is also known as?

Kirchhoff’s second law is also known as Kirchhoff’s voltage law.

 Q1.What is Wheatstone Bridge?

Wheatstone bridge, also known as the resistance bridge, calculates the unknown resistance by balancing two legs of the bridge circuit. One leg includes the component of unknown resistance.

Q2.What is the Wheatstone Bridge Principle?

The Wheatstone bridge works on the principle of null deflection, i.e. the ratio of their resistances are equal and no current flows through the circuit.

Q3.When is the Wheatstone Bridge balanced?

A Wheatstone bridge is said to be in a balanced condition when no current flows through the galvanometer. This condition can be achieved by adjusting the known resistance and variable resistance.

Q4.When is the Wheatstone Bridge said to be unbalanced?

Under normal conditions, the bridge is in an unbalanced condition where current flows through the galvanometer.

Q5.What are the limitations of Wheatstone Bridge?

For low resistance measurement, the resistance of the leads and contacts becomes significant and introduces an error.

Q1.What is the principle of a potentiometer?

According to the principle of a potentiometer, the potential dropped across a segment of a wire of uniform cross-section carrying a constant current is directly proportional to its length.

Q2.What is the use of a potentiometer?

The electrical potential or EMF of the cell is measured using a potentiometer.

Q3.Why is a potentiometer preferable over a voltmeter?

When measuring the emf of a cell, the potentiometer is preferred over the voltmeter since it is a null device that does not draw any current. Whereas, the voltmeter draws current from the cell.