Distance-Time Graphs Displacement-Time Graphs Velocity-Time Graphs Acceleration-Time Graphs Summary of Kinematics Graphs The figure below shows the displacement-time graph, velocity-time graph and acceleration-time graph for the respective state of motion. It serves as a summary of the text above. The figure below shows the relationship between displacement-time graph, velocity-time graph and acceleration-time graph. Worked Examples Example 1 Can you tell …
A transformer is a device that changes a high alternating voltage at low current to a low alternating voltage at high current or vice versa. Structure of transformer: Primary coil: Connected to primary input voltage ($V_{p}$) with turns ($N_{p}$) Secondary coil: connected to load with output voltage ($V_{s}$) with turns ($N_{s}$) Soft-iron core: The coils are wound around a laminated …
Faraday’s Law Of Electromagnetic Induction Faraday’s Law of Electromagnetic induction is the process in which an electromotive force (emf) is induced in a closed circuit due to changes in the magnetic field around the circuit. Lenz’s Law Lenz’s law states that the direction of the induced e.m.f. and hence the induced current in a closed circuit is always such as …
In order to understand how a D.C. motor works, we will need to learn how a current-carrying coil generates turning effect in a magnetic field. Turning effect of a current-carrying coil in a magnetic field The coil is placed horizontally between two magnets as shown in the figure above. The magnetic field points from the N to S. Using Fleming’s …
This post contains all the important formulas that you need for GCE O Level Physics. (Equivalent to American High School Diploma) If you do not recognise any of the formulas listed here, you should go review the respective topic. For definitions, please visit All Definitions Needed For O Level. Measurements Physical quantity Base SI unit Mass (m) Kilogram (Kg) Length …
Cameras In cameras, converging lenses play a critical role in focusing light onto the film or digital sensor. The lens gathers light rays from a scene and converges them to form a sharp image. The curvature and composition of the lens elements determine the focal length, which affects the angle of view and magnification. Converging lenses in camera systems can …
Converging Lens Any optical lens that is thicker in the middle than at the edges will make parallel light rays converge to a point, and is called converging lens. How Does The Lens Works? The basic principle behind its operation is refraction, a phenomenon that occurs when light passes through materials of different densities, changing its speed and direction. A …