12 HSC Physics Revision

Who unified the concepts of electricity and magnetism?

• James Clerk Maxwell
• Isaac Newton
• Carl Friedwich Gauss

Who was the first scientist to come up with a value for the speed of light?

• Ole Roemer
• Galileo Galilei
• James Clerk Maxwell

What is the Lorentz Factor?

• A quantity expressing how much the measurements of physical properties change for an object at relativistic speeds.
• Part of the mass-energy formula
• A calculation used to calculate the position on a space-time globe

What is the evidence for relativistic time and length

• Cosmic ray muons and atomic clocks
• Particle accelerators and cosmological studies
• Trains with lights that do and do not fit inside tunnels of exactly equal lengths

What were the conclusions of Einstein’s first thought experiment?

• The aether model of light is incorrect, he would see his reflection in the mirror, the speed of light is constant regardless of the motion of the observer.
• Time dilation and length contraction
• Relativistic mass and relativistic momentum

What was the result of Einstein’s 2nd thought experiment?

• Time dilation
• Length contraction
• The speed of light

What was the result of Einstein’s 3rd experiment?

• Length contraction
• Time dilation
• A new model of light

What did Milikan’s experiment involve?

• Suspending charged oil particles in an electric field, and using the voltage of the field and the mass of each particle to calculate charge
• Suspending charged oil particles in an magnetic field measuring the potential at which they remain stationary w
• Firing an electron through an electric field and meaasuring the radius of curvature to determine charge

What is Faraday’s Law?

• A changing magnetic field creates a changing electric field
• A changing electric field creates a changing magnetic field
• A changing magnetic field induces an emf counterracting the change in magnetic field

What is Kepler’s 1st Law

• Each planet orbits the sun in an elliptical orbit
• A line running from the sun to the planet sweeps out equal areas of the ellipse in equal times
• The squares of the orbital periods of the planets are directly proportional to the cubes of the semi-major axes of their orbits