IB Physics Topic 4 Videos

This video introduces Newton’s law of gravitation and the concept of gravitational fields. It explains how to calculate gravitational force and field strength, including examples involving equilibrium and resultant forces between multiple masses.

This video covers Kepler’s three laws of planetary motion, explaining orbital shapes, varying speeds, and the relationship between period and orbital radius. Worked examples show how to apply both the standard and ratio forms of Kepler’s third law.

This video introduces gravitational potential, potential difference, and potential energy. It explains how energy changes in a gravitational field and describes equipotential lines in field diagrams.

This video explains the gravitational potential gradient and its application in escape speed, orbital velocity, and orbital energy. It also covers orbital decay due to atmospheric drag.

This video introduces electric charge, explains the Millikan oil drop experiment, and explores three methods of electrification: friction, induction, and conduction.

This video explores the electrostatic force using Coulomb’s law and introduces electric fields. It explains how to calculate field strength and describes field patterns for point charges and plate distributions.

This video explains how moving charges create magnetic fields, introduces atomic-level magnetism, and compares ferromagnetic, paramagnetic, and diamagnetic materials. It also covers field patterns for magnets and current-carrying wires.

This video explores electric potential, potential difference, and electric potential energy. It also introduces equipotential lines and the electric potential gradient in both point and spherical charges.

This video explains the motor effect and how charges and currents interact with magnetic fields. It introduces relevant formulas and Fleming’s left-hand rule, then explores magnetic interactions between parallel wires.

This video introduces magnetic flux and explains electromagnetic induction using Faraday’s and Lenz’s laws. It covers how emf is induced in a conductor moving through a magnetic field.

This video explains how alternating current is produced using rotating coils and Faraday’s law. It introduces total flux linkage and shows how emf varies in coils over time.