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Learn how to read IB Physics nuclear notation: identify nucleon number, proton number, neutrons, isotopes, ions, and decay equations correctly.
Read the answerLearn why high-energy alpha scattering departs from Rutherford's model when particles probe nuclear size and the strong nuclear force in IB Physics HL.
Learn how an atomic energy-level drop determines photon frequency using E = hf, with a worked IB Physics example and exam guidance for SL and HL students.
Learn how emission and absorption spectra reveal discrete atomic energy levels, photon transitions, and elemental composition for IB Physics exams.
Learn how emission and absorption spectra reveal chemical composition by matching spectral lines to unique atomic energy-level transitions in IB Physics E.1.
Learn how electromagnetic induction enabled generators, transformers, and motors, transforming factories and later industrialization in IB Physics HL.
Learn how gold foil scattering revealed a tiny, dense, positively charged nucleus, showed atoms are mostly empty space, and disproved the plum pudding model.
Learn Ohm's law for IB Physics, including the relationship between current and potential difference, its conditions, graphs, and exam applications.
Learn how rotation frequency affects induced EMF in a rotating coil using Faraday’s law, magnetic flux, angular frequency, and IB HL exam equations.
Learn how a rotating coil changes magnetic flux, inducing a sinusoidal emf through Faraday’s and Lenz’s laws in an AC generator for IB Physics HL.
Learn how Lenz's law determines induced current direction, opposes magnetic flux changes, and follows energy conservation in IB Physics HL exams.
Learn what magnetic flux means, how to use Φ = BA cos θ, select the correct angle, apply units, and avoid mistakes in IB Physics HL induction.
Learn how IB Physics HL students use ε = BvL to calculate motional emf, check perpendicular geometry, determine polarity, and avoid common exam errors.
Learn why magnetic force changes a charged particle's direction but not its speed or kinetic energy, with IB Physics D.3 equations and exam tips.
Learn Faraday's law of induction, magnetic flux, flux linkage, Lenz's law, and the negative sign for IB Physics HL exam questions.
Learn how to calculate force per unit length between parallel current-carrying wires, determine attraction or repulsion, and avoid common IB errors in exams.
Learn how path radius, speed, and magnetic field strength determine a particle's charge-to-mass ratio in IB Physics D.3 exam questions.
Learn how to use F = BIL sin θ, identify the correct angle and force direction, and avoid common IB Physics exam errors at both SL and HL.
Learn how crossed electric and magnetic fields act on a charged particle, when forces cancel, and how speed and charge determine its path in IB Physics exams.
Learn how to calculate magnetic force using F = qvB sin θ, determine its direction, and avoid common mistakes in IB Physics D.3 SL and HL questions.
Learn what gravitational field strength means, how to calculate g using force per unit mass or Newton's law, and avoid common IB Physics exam errors.
Learn how to sketch gravitational field lines for point masses, spherical bodies, and uniform fields using precise IB Physics exam conventions.
Learn how charge sign, field strength, mass and initial velocity determine a particle's acceleration and trajectory in a uniform electric field.
Learn how a charged particle follows circular, helical, or straight-line motion in a uniform magnetic field, with key IB Physics equations and exam tips.
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