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Transformer works on Faraday’s law of mutual induction.
Faraday’s law of electromagnetic induction states that, when a change takes place in the magnetic flux which is linked with a circuit, an electromotive force current will induce in the circuit.
A transformer is a device that transfers electric energy from one alternating-current circuit to one or more other circuits, either increasing (stepping up) or reducing (stepping down) the voltage.

Stars twinkle because they appear as small dot as seen from Earth. Planets don’t twinkle because they are closer, and thus appear larger in our sky and thus the variations in intensity goes unnoticed.

A crystal or crystalline solid is a solid material whose constituents are arranged in a highly ordered microscopic structure , forming a crystal lattice that extends in all directions .

Crystalline solids have well – defined edges and faces , diffract x-rays , and tend to have sharp melting points . In contrast , amorphous solids have irregular or curved surfaces , do not give well – resolved x-ray diffraction patterns , and melt over a wide range of temperatures .

Abscisic acid (ABA) is a plant hormone. ABA functions in many plant developmental processes, including seed and bud dormancy, the control of organ size and stomatal closure.

Because of the Earth’s rotation.
That is due to the Earth’s rotation. The Earth rotates toward the East; that makes the stars seem to move towards the West.

They don’t really – they only appear to move east to west, due to the Earth’s rotation…same as the sun.
Because the earth upon which you’re standing is spinning … one complete rotation every 24 hours.
That means that the direction your nose points is constantly changing.

Nymph-larva of Insects

Caterpillar-larva of Butterfly

Maggot – larva of Fly

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term “laser” originated as an acronym for “Light Amplification by Stimulated Emission of Radiation

Lactobacillus Bacteria in Milk that changes Milk to Curd. When milk is heated to a temperature of 30-40 degrees centigrade and a small amount of old curd added to it, the lactobacillus in that curd sample gets activated and multiplies. These convert the lactose into lactic acid

Ohm’s Law is given by: V = I R where V is the potential difference between two points which include a resistance R.

The Dumas method of molecular weight determination was historically a procedure used to determine the molecular weight of an unknown substance.

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