Current Density Current density is a point is defined as the amount of current flowing per unit area round that point provided area is normal to the direction of current. It is denoted by J. Current Density (J) = Current (I)/ Area (A). The unit of current of current density is A/ m². Current density Read more about Current Density[…]
Capacity of Parallel – Plate Capacitor with Dielectric When a dielectric material is placed between the plates of a capacitor, the capacitance of the capacitor increases.These are non-conductors up to a certain value of field depending upon their nature.If the field exceeds the limiting value, called dielectric strength, dielectric loses its insulating property and beings Read more about Capacity of Parallel – Plate Capacitor with Dielectric[…]
Locus of Point of Intersection of Tangent under Different Conditions Tangent to the parabola y² = 4ax at point P (at₁², 2at₁) and Q (at₂², 2at₂) are t₁ y = x +at₁² and t₂ y = x + at₂² respectively. These tangents intersect at point R (at₁t₂,a (t₁ + t₂). If we want to find Read more about Locus of Point of Intersection of Tangent under Different Conditions[…]
Sathyabama All India Engineering Entrance Examination (SAEEE) 2019 Released Updated Candidates are required to assure themselves that they possess the requisite eligibility criteria for admission to a programme before applying for entrance examination. Eligibility Criteria: Candidates can choose any of the following programmes based on the eligibility criteria. Candidates should have passed the qualifying examination Read more about Sathyabama All India Engineering Entrance Examination (SAEEE) 2019 Released Updated[…]
Length of the Tangent from a Point to a Circle Let the circle x²+ y² + 2gx + 2fy + c = 0. Then the center and the radius of the circleis are (-g, -f) and √ (g² +f² – c) respectively. Let P (x₁, y₁) be any point outside the circle In ΔPCT . Read more about Length of the Tangent from a Point to a Circle[…]
Dielectric in an Electric Field Suppose a slab of dielectric material is placed in a uniform electric field set up between the parallel plates of a charged capacitor. The slab becomes electrically polarized. That is, its molecules become electric dipoles oriented in the direction of the field. The net effect is the appearance of negative Read more about Dielectric in an Electric Field[…]
West Bengal Joint Entrance Exam (WBJEE) 2019 Notification Released The West Bengal Joint Entrance Examinations Board (WBJEEB) was constituted in the year 1962 by the Government of West Bengal, in exercise of the powers conferred under article 162 of the Constitution of India pursuant to No. 828-Edn(T), dated 02.03.1962for the purpose of conducting Joint Entrance Read more about West Bengal Joint Entrance Exam (WBJEE) 2019 Notification Released[…]
Segments of Secants, Chord and Tangent Segments of Secants and Chord: Secants AB and CD intersect inside the circle in fig (a) and outside the circle in fig (b). From the figure, we have ∠DCB = ∠DAB and ∠ADC = ∠ABC Hence ΔADE ~ ΔCBE ∴ . AE x BE = CE x DE Segments Read more about Segments of Secants, Chord and Tangent[…]
Dielectric Constant In many capacitors there is an insulating material such as paper or plastic between the plates. Such material, called a dielectric, can be used to maintain a physical separation of the plates.There are non – conductors up to a certain value of field depending upon theirnature. If the field exceeds the limiting value, Read more about Dielectric Constant[…]
REVA University Engineering Entrance Test (REVA EET)2019 Notification Released REVA University is alive withthe confluence of different minds and energies. The exchange and interminglingof these vivacities characterizes life at REVA. The fellows of REVA, whetherthe vibrant faculty, the management and the pulsating student community, areall engaged to the brim in an intellectual tete a tete Read more about REVA University Engineering Entrance Test (REVA EET) 2019 Notification Released[…]