Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Current Electricity

Question:

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?

Options:

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.

Correct Answer:

In a balanced Wheatstone bridge, if the cell and galvanometer are exchanged the null point is disturbed.

Explanation:

In a balanced Wheatstone bridge, if the cell and galvanometer are exchanged the null point is not disturbed.