Michael Faraday (1791-1867) introduced the concept of lines of force for visualizing electric (and magnetic) fields. An electric line of force is an imaginary curve drawn in such a way that the tangent at any point gives the direction of the electric field at that point. Lines of force are imaginary, but the field they Read more about Electric Lines of Force[…]
This apparent change in frequency of the wave it due to motion of the source or the observer is called Doppler Effect d. Observer Stationary and Source Moving: Now suppose the observer is at rest with respect to the medium and the source moves towards the observer at a speed u which is less than Read more about Doppler Effect[…]
First let us consider a uniform field, for which the lines of force are parallel and equidistance from each other. Let A and B be two points in a uniform electric field of intensity E.Let WAB, be the work done to carry a test charge q0 from A to B. Let the potential at A Read more about Relation between Electric Intensity and Potential[…]
We know that in the series combination current will be same across all the capacitors and voltage gets divided across themi = c dv/dt => V = ∫ (i/c) dt v = v₁ + v₂ + v₃ ∫ (ieq/ceq) dt = ∫ (i₁/c₁) dt + ∫ (i₂/c₂) dt + … + ∫ (in/cn) dt i Read more about Capacitor in Series and Parallel[…]
If a liquid is filled in a vessel up to height H and a hole is made at a depth h below the free surface of the liquid as shown in figure, then taking the level of hole as reference level (i.e., zero point of potential energy) and applying Bernoulli’s principle to the liquid just Read more about Velocity of Efflux[…]
Phase relationship between displacement, velocity and acceleration of SHM As we have seen that x = A sin (ωt + φ) v = A ω cos (ωt+ φ) = Aω sin (ωt + φ + π/2) And a= – Aω2 sin (ωt + φ) = Aω2 sin (ω t + φ + π) Thus, we Read more about Velocity & Acceleration of SHM[…]
1. The time period of a simple pendulum is T = 2π √ (l/g) => T α √l or T α 1/√g T α √ (l/g) Using these relations. We may conclude => The graph between T2 and l is a straight line. => The graph between T and l is a parabola. => The Read more about Tips & Tricks of SHM[…]
⇒ Generally matter expands on heating and contracts on cooling. In case of water, it expands on heating if its temperature is greater than 4°C. In the range 0°C to 4°C, water contracts on heating and expands on cooling, i.e. g is negative. This behaviour of water in the range from 0°C to 4°C is Read more about Anomalous Expansion of Water[…]
Case i: Three vessel have different shapes, but the same base area and the same weight when empty. They are filled with water to the same level.a) Are the water pressure at the bottom of the each vessel are same? If not, which is larger and which is smaller? Solution: As, P = Patm + Read more about Hydrostatic Paradox[…]
In order to describe the motion of a fluid, in principle one might apply Newton’s laws to a particle (a small volume element of fluid) and follow its progress in time. This is difficult approach. Instead, we consider the properties of the fluid, such as velocity pressure, at fixed points in space. In order to Read more about Equation of Continuity[…]