Natural Science Quiz Questions and Answers for Competitive Exams

Parsec or parallactic second or is a unit of distance. It is defined as the distance at which one AU (astronomical unit) subtends an angle of one arc second, and is equal to 3.26 light years. Or, it is the unit of length which is used to measure the large distances of celestial bodies outside the solar system.

Due to total internal reflection light gets trapped inside the bubble, making it shine.

The following animals have blood groups that are similar to humans: Chimpanzees. Gorillas. Orangutans.

Each person normally has one pair of sex chromosomes in each cell. The Y chromosome is present in males, who have one X and one Y chromosome, while females have two X chromosomes. Identifying genes on each chromosome is an active area of genetic research.

The mammalian middle ear contains three ossicles, which move the vibrations of the eardrum into waves in the liquid and membrane of the inward ear. There are three ossicles in every ear : Malleus, Incus, Stapes. As we have a couple of ears, so altogether there are 6 ossicles, or 3 sets of ossicles.

At high temperatures, the tungsten filament gets hot and atoms in the filament vibrate more. The electrons in the current now collide more with the atoms & more energy is needed to push the current through the filament. Hence, the resistance of tungsten increases with temperature.

In an AC circuit, magnetic reversal due to phase difference between current and voltage occurs 50 or 60 times per second. A capacitor helps to improve the power factor by relieving the supply line of the reactive power.

The tendency nowadays is to use synduction or synchronous motors. The synduction motor resembles an induction motor but runs at synchronous speed.

A capacitor stores energy in the form of an electrostatic field between its plates. Increasing the size of the plates increases the capacitance because there is more room for the electrons to escape.

Odisha Chief Minister Naveen Patnaik has launched the 'Mo Sarkar' program. This program promotes Gandhian thinking. Also, encourages people to raise their voice for their rights. 'Mo Sarkar' aims to improve governance by collecting feedback on the behavior and professionalism displayed by government officials. This program has been started in 21 district headquarters, hospitals and medical colleges of Cuttack, Sambalpur and Berhampur.