ELECTRICAL MEASURING INSTRUMENTS For the detection or measurement of electric current, potential difference, and resistance certain instruments have been devised viz. The galvanometer for the detection of small currents measurements of small currents of the order of micro amperes or mili amperes the voltmeter or potentiometer for the measurement of potential difference (and voltage) between two points of a circuit are the EMF of a source the ammeter for the measurement of large currents the wheatstone bridge the meter Bridge the post office box and the ohmmeter for the measurement of resistance. THE MOVING COIL GALVANOMETER The moving coil galvanometer is a basic electrical instrument it is used for the detection (and Measurement) of small currents. Its underlying principle is the fact that when a current flows in a rectangular coil placed in a magnetic field it experiences a magnetic torque. If it is free to rotate under a controlling torque, it rotates through an angle proportional t...
FOOD AND NUTRITION Introduction : Food and nutrition is a field of biochemistry which deals with the nutrients and caloric requirement of the living body.It deals with the effect on growth and metabolism of the living system arising from the imbalanced diet.For instance the statistical survey data of food and nutrition showed that 30 % population was suffering from the disease of malnutrition Diseases like decayed and crocked teeth, bone deformation,lack of mental alertness and under weight were real outcome of the unbalanced food and diet. Classification : The food is required by the body to achieve three purposes. (a) Energy (b) Growth and maintenance of tissues (c) Regulation of body processes and for the sake of simplicity It is classified into six groups: (i) Carbohydrate (ii) Lipids and fat (iii) Proteins (iv) Vitamins (v) Minerals (vi) Water Elements of Nutrition : For healthy performance, each day the diet must supply the body with: A...