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IB
B.5.3 Resistance and Resistivity

A.1 Kinematics

A.2 Forces and momentum

A.3 Work, energy and power

A.4 Rigid body mechanics (HL only)

A.5 Galilean and special relativity (HL only)

B.1 Thermal energy transfers

B.2 Greenhouse effect

B.3 Gas laws

B.4 Thermodynamics (HL only)

B.5 Current and circuits

C.1 Simple harmonic motion

C.2 Wave model

C.3 Wave phenomena

C.4 Standing waves and resonance

C.5 Doppler effect

D.1 Gravitational fields

D.2 Electric and magnetic fields

D.3 Motion in electromagnetic fields

D.4 Induction (HL only)

E.1 Structure of the atom

E.2 Quantum physics (HL only)

E.3 Radioactive decay

E.4 Fission

E.5 Fusion and stars

IB Physics B.5.3 Resistance and Resistivity Key Definitions

B.5.3 Resistance and Resistivity Key Definitions

Definition

Ohm's law

Ohm’s Law states that the current through a conductor is directly proportional to the potential difference across it, provided the temperature remains constant.

Definition

Resistance

Resistance is a measure of how much a material opposes the flow of electric current.

Definition

Resistivity

Resistivity is a fundamental property of a material that quantifies how strongly it resists the flow of electric current.

Key Definitions