A Wheatstone bridge can be formed using a combination of series and parallel resistors.

The configuration 1s2 2s2 2p6 3s2 3p6 is incorrect as it exceeds the maximum number of electrons in the 3rd shell.

The configuration 1s2 2s2 2p6 corresponds to Neon, a noble gas.

The configuration [Kr] 5s2 4d5 represents Molybdenum (Mo), a transition metal.

A solenoid produces a uniform magnetic field in its interior, as described by the Biot-Savart Law.

A solenoid produces a uniform magnetic field inside it, as described by the Biot-Savart Law.

A toroid produces the strongest magnetic field at its center due to the closed loop configuration of the wire.

Gravitational field lines never intersect because it would imply two different gravitational forces acting on the same point.

Gravitational potential energy is a scalar quantity and can be negative when the object is within the gravitational field of another mass.

The gravitational field strength (g) at a distance r from a mass M is given by g = GM/r².

The gravitational force is proportional to the product of the masses of the two objects.

The gravitational force is always attractive and acts over long distances, though it is weaker than the electromagnetic force.

The gravitational field is the negative gradient of gravitational potential.

Gravitational force is inversely proportional to the square of the distance between the centers of two masses.

The gravitational force is directly proportional to the product of the masses of the two objects.

Nepal is a landlocked country, surrounded by India and China.

Germany was not a founding member of the United Nations; it joined later.

The water cycle describes the continuous movement of water within the Earth and atmosphere.

All of the above cycles (water, carbon, and nitrogen) are essential for the growth of plants.

The carbon cycle is involved in photosynthesis, as plants absorb carbon dioxide from the atmosphere.

Scandium has the highest atomic radius among the given d-block elements.

Copper (Cu) is known for its excellent electrical conductivity.

Mercury (Hg) is the only metal that is liquid at room temperature.

Nickel (Ni) is commonly used in making various alloys due to its strength and corrosion resistance.

Variance of A = 0.67, B = 0, C = 12, D = 0. Thus, C has the highest variance.

Stage 2 of the demographic transition model is characterized by high birth and declining death rates, leading to population growth.

A consistent system can either have one solution or infinitely many solutions.

Dependent systems have infinitely many solutions as they represent the same line.

A polynomial function is defined as a function that can be expressed as a sum of powers of x with constant coefficients.

A polynomial that includes a variable in the denominator is not a polynomial function.