To determine the correctness of the statements about the electrostatic precipitator in thermal power plants, let's analyze each statement individually:
Statement I: Electrostatic precipitator is most widely used in thermal power plant.
This statement is correct. Electrostatic precipitators are commonly used in thermal power plants to control and reduce particulate emissions from the flue gas. They are effective in removing fine particles like dust and smoke from industrial gases, ensuring cleaner emissions.
Statement II: Electrostatic precipitator in thermal power plant removes ionising radiations.
This statement is incorrect. Electrostatic precipitators are designed to capture particulate matter from exhaust streams and do not address or remove ionising radiation. Ionising radiation involves high-energy particles or waves that can ionise atoms, which is a different environmental concern not managed by this equipment.
Therefore, the correct evaluation of the statements is: Statement I is correct but Statement II is incorrect.
The correct option is (B): Statement I is correct but Statement II is incorrect
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :