SSC CGL GK Questions 2026

The fuse is a short piece of wire of low melting point placed in series in the live line, so that an excessive current melts it and breaks the circuit.

In 1831 Faraday showed that when the magnetic flux linked with a closed coil changes, whether by moving a magnet, moving the coil or changing the current in a nearby coil, a current is induced in it.

In Fleming's left hand rule the forefinger, the middle finger and the thumb of the left hand are held at right angles to one another: the forefinger points along the magnetic field, the middle finger along the current, and the thumb then gives the direction of the force.

Hold the conductor in your right hand with the thumb stretched along the direction of the conventional current; the way your fingers curl round the wire is the direction of the concentric magnetic field lines.

Tungsten has the highest melting point of all metals, well above three thousand degrees Celsius, so a thin tungsten wire can be heated until it glows white without melting.

By Ohm's law the resistance equals the potential difference divided by the current. Here the current must first be converted into the base unit: two milliampere is 0.002 ampere.

A microwave oven does not cook by passing a current through a resistance. It generates microwaves in a magnetron, and these waves make the water molecules in the food rotate rapidly, so the food heats from within by dielectric heating.

The potential difference between two points in a circuit is defined as the work done in moving a unit positive charge from one point to the other.

By Ohm's law, at a constant temperature the current through a conductor is directly proportional to the potential difference across its ends, since the current equals the potential difference divided by the resistance.

Set up in 1981 and based at Dehradun, it assesses the country's forest and tree cover from satellite data and brings out the India State of Forest Report once every two years, giving the cover state by state and by density class.

The Montreal Protocol was adopted under the Vienna Convention of 1985 and sets a timetable for phasing out chlorofluorocarbons, halons and similar chemicals.

The convention was signed in 1971 at Ramsar, a town in Iran, and is the oldest of the modern global conservation treaties.

It added Article 48A to the directive principles, asking the state to protect and improve the environment and to safeguard forests and wildlife, and Article 51A, clause g, to the fundamental duties, laying the same obligation on every citizen.

The Authority was set up under the Biological Diversity Act of 2002 and is based at Chennai in Tamil Nadu.

The Board was created by that Act to advise the central government, to lay down standards for effluents and to coordinate the work of the State Pollution Control Boards, which were set up by the same law in the states.

The National Green Tribunal Act was passed in 2010 and the tribunal began work in the same year, to provide quick and specialised disposal of cases on environmental protection and forest conservation.

The Act was passed in the wake of the Bhopal gas tragedy and gives the central government a general power to take any measure it considers necessary to protect and improve the quality of the environment.

The National Clean Air Programme was launched by the Ministry of Environment, Forest and Climate Change in January 2019 as a national framework to cut particulate pollution in cities that do not meet the national ambient air quality standards.

The Stockholm Convention was adopted in 2001 and came into force in 2004.

Founded in 1948 and based in Switzerland, it maintains the Red List of Threatened Species, which grades species as least concern, near threatened, vulnerable, endangered, critically endangered, extinct in the wild or extinct.