Capacitance
Capacitance is the measure of an object’s ability to store an electric charge. Any body…
Chau Pham
Resistance
According to Ohm’s law, the voltage drop, V, across a resistor when a current flows…
Electromotive force, voltage
Electromotive force (emf) is the potential difference of a source when no current is flowing.…
Current I = ΔQ/Δt, sign conventions, units
Current (I) is the measurement of the amount of moving charge passing through a cross-section…
Transverse and longitudinal waves: wavelength and propagation speed
In transverse wave, particles oscillate up and down, perpendicular to direction of propagation. Longitudinal waves…
Amplitude, frequency, phase
Periodic motion or harmonic motion is any motion that repeats at regular intervals. Simple harmonic…
Power, units
Power is the amount of energy produced per unit time. Power = Work/Time. This is…
Conservation of energy
Conservation of mechanical energy states that the mechanical energy of an isolated system remains constant…
Potential Energy
Potential energy (gravitational energy, spring energy, etc) is the energy difference between the energy of…
Kinetic Energy: KE = 1⁄2 mv2; units
The kinetic energy of an object is the energy it possesses due to motion. Energy…