Practicing Success
Case: Read the passage and answer the following questions Kirchhoff's first law applies to currents at a junction in a circuit. It states that at a junction in an electrical circuit, the sum of currents flowing into the junction is equal to the sum of currents flowing out of the junction. Kirchhoff's second law, also known as Kirchhoff's voltage law states that the sum of all voltages around a closed loop in any circuit must be equal to zero. This again is a consequence of charge conservation and also conservation of energy. Wheatstone bridge, also known as the resistance bridge, calculates the unknown resistance by balancing two legs of the bridge circuit working on Kirchhoff's law. |
Which of the following statement is false? |
Kirchhoff's first law is based on the conservation of charge Kirchhoff's second law is based on the conservation of energy A rheostat can be used as a potential divider In a balanced Wheatstone bridge, if the cell and galvanometer are exchanged the null point is disturbed. |
In a balanced Wheatstone bridge, if the cell and galvanometer are exchanged the null point is disturbed. |
In a balanced Wheatstone bridge, if the cell and galvanometer are exchanged the null point is not disturbed. |