Equation of a Plane Progressive Wave 1) If during propagation of a progressive wave, the particles of the medium perform Simple Harmonic Motion about their mean position, then the waves is known as a Harmonic progressive wave. 2) Suppose a plane simple harmonic wave travels from the origin along the positive direction of x – Read more about Equation of a Plane Progressive Wave[…]
Water Equivalent Water equivalent of a body is defined as the mass of water which would absorb or evolve the same amount of heat as is done by the body in rising or falling through the same range of temperature. It is represented by W. It is the quantity of water whose thermal capacity is Read more about Water Equivalent[…]
Relation between Electric Field and Potential The electric filed exists only if there is an electric potential difference. If the charge is uniform at all point, however high the electric potential is, there will not be any electric field. If the field is directed from lower potential to higher then the direction is taken to Read more about Relation between Electric Field and Potential[…]
Displacement in Simple Harmonic Motion (1) The displacement of a particle executing Simple Harmonic Motion at an instant is defined as the distance of particle from the mean position at that instant. (2) Simple harmonic Motion is also defined as the projection of uniform circular motion of any diameter of circle of reference. (3) If Read more about Displacement in Simple Harmonic Motion[…]
Acceleration in Simple Harmonic Motion Simple Harmonic Motion is any motion where a restoring force is applied that is proportional to the displacement and in the opposite direction of that displacement. (1) The acceleration of the particle executing S.H.M at any instant is defined as the rate of change of its velocity at that instant Read more about Acceleration in Simple Harmonic Motion[…]
Work done in Stretching a wire In stretching a wire work is done against internal restoring forces. This work is stored as elastic potential energy or strain energy. If a force F acts along the length L of the wire or cross section A and stretches it by x then: . So, the work done Read more about Work done in Stretching a wire[…]
Heat Engine Efficiency A heat engine is a device that converts heat into work continuously through a cyclic process. It takes heat from a reservoir then does some like moving a piston, lifting weight etc. and finally discharging some of the heat energy into the sink. Schematically it can be represented as: The essential parts Read more about Heat Engine Efficiency[…]
Magnetic Maps and Neutral Points Magnetic Maps: Magnetic map is obtained by drawing lines on the surface of earth, which passes through different places having same magnetic elements. Magnetic maps i.e.., declination, dip and horizontal component over the earth vary in magnitude from place to place. It is found that many places have the same Read more about Magnetic Maps and Neutral Points[…]
Resultant Amplitude and Intensity Intensity if the power transferred per unit area that is perpendicular to the direction of propagation of the energy. Intensity is directly proportional to square root of the amplitude. So, if intensity becomes double, then amplitude will become four times. Let us consider two waves that have the same frequency but Read more about Resultant Amplitude and Intensity[…]
Thermal Capacity Thermal Capacity of a substance is defined as the amount of heat required to change its temperature through one degree. If Q is the amount of required to change the temperature of a body of mass m through, then Q = msΔθ If temperature difference = 1, then Q = ms The value Read more about Thermal Capacity[…]