The question asks for the term that defines the capacity to do work. This is a fundamental definition in physics. We need to recall the definitions of the given options and identify which one matches "capacity to do work."
Correct Option: A) Energy is defined as the capacity to do work. For example, a body possesses kinetic energy due to its motion, which allows it to do work (e.g., hit another object and move it). Similarly, potential energy allows a body to do work when it changes its position or state.
The question asks to identify the correct statements about the Agni-IV missile. We need to evaluate each statement based on known facts about the Agni-IV missile, which is part of India's Agni series of ballistic missiles.
Based on the evaluation, only Statement 1 is correct.
Correct Option: A) 1 only
The question asks to identify which of the given options is a physical quantity. A physical quantity is a property of a phenomenon, body, or substance that can be quantified by measurement. It can be expressed as a numerical value and a unit.
D) All the above — Power, Energy, and Work are all fundamental concepts in physics that can be measured and expressed with specific units. Therefore, they are all physical quantities.
The question asks to identify the correct description of 'INS Astradharini', which was in the news in 2016. This requires knowledge of current affairs related to Indian defense and naval vessels.
Correct Option: C) Torpedo launch and recovery vessel
INS Astradharini is indeed a Torpedo launch and recovery vessel. It was designed and built by the Indian Navy and Hindustan Shipyard Limited (HSL) and commissioned in December 2015. Its main function is to carry out trials of various underwater weapons systems, including torpedoes and mines, and to facilitate their launch and recovery.
The question asks for the SI unit of work. We need to recall the definitions of work and the standard units for various physical quantities in the International System of Units (SI).
Correct Option: A) Joule is the SI unit of work. One Joule is defined as the amount of work done when a force of one Newton displaces an object by one meter in the direction of the force. Mathematically, \(1 \text{ J} = 1 \text{ N} \cdot 1 \text{ m}\).
The question asks to identify 'Greased Lightning -10 (GL-10)', which was in the news. This requires knowledge of recent developments in science and technology, specifically in aerospace.
The 'Greased Lightning -10 (GL-10)' is indeed an experimental unmanned aerial vehicle (UAV) developed by NASA. It is a battery-powered, 10-engine plane that can take off and land vertically like a helicopter and fly efficiently like a plane. It was tested by NASA in 2015-2016.
A) Electric plane tested by NASA — This is correct. The GL-10, or Greased Lightning, is an electric-powered aircraft developed by NASA, designed for vertical take-off and landing (VTOL) capabilities, and was indeed tested around the time the question was framed.