Each of the following questions consists of two statements, one labelled ‘Assertion (A)’ and the other labelled the ‘Reason (R)’. Examine the two statements carefully and decide if the Assertion (A) and Reason (R) are individually true and if so whether the Reason (R) is the correct explanation of the Assertion (A). Select your answers … Read more
What is Ultrasound? Ultrasound or ultrasonography is a medical imaging technique that uses high-frequency sound waves and their echoes to create images of the inside of the body. This technique is similar to the SONAR used by submarines, echolocation used by bats, dolphins, and whales. How Ultrasound Creates an Image A gel is applied to the body area which … Read more
Thevenin’s theorem Definition In any linear bi-directional circuit having more number of elements, it can be replaced by a single equivalent circuit consisting of equivalent voltage (Thevenin equivalent voltage) in series with an equivalent resistance (Thevenin equivalent resistance). By using Thevenin’s theorem load current can be calculated either in linear or nonlinear load. Consider a … Read more
Water pollution involves contaminated water, whether from chemical, particulate, or bacterial matter that degrades the water’s quality and purity. It can occur in oceans, rivers, lakes, and underground reservoirs, and as different water sources flow together the pollution can spread. The causes of water pollution include the increased sediment from soil erosion, improper waste disposal … Read more
Sigma-delta Analog-to-Digital Converter (ADC) is used in many application including telecommunications for analog to digital conversion. A Sigma-delta ADC has a modulator and a digital filter (also called as decimation filter) as shown in Fig. 1. A modulator converts the input analog signal into digital bit streams (1s and 0s). The Sigma-delta ADC method is based … Read more
Permittivity of a Material The permittivity is the property of the material which shows the development of an electric field in the presence of an external electric field. In other words, It is the ability of the material to develop the electric field in the presence of an external electric field. It is represented by the … Read more
Noise pollution refers to undesirable levels of noises caused by human activity that disrupt the standard of living in the affected area. It comes from traffic, airports, railroads, manufacturing plants, construction or demolition, concerts, etc. Some noise pollution may be temporary while other sources are permanent. The effects may include hearing loss, wildlife disturbances, and … Read more
Soil pollution is the contamination of the soil that prevents natural growth and balance in the land which is used for cultivation, habitation, or wildlife reserve. It is also called as land pollution. Soil pollution sources include hazardous waste and sewage spills, strip mining, deforestation, household dumping, littering, etc. Soil contamination can lead to poor … Read more
Body Planes They are the hypothetical geometric planes that are used to divide the body into sections. Body Planes are commonly used in both human and zoological anatomy to describe the location or direction of bodily structures. 1. Sagittal or median plane divides the body into sinister and dexter (left and right) sides. 2. Coronal … Read more