Physics paper 1 stuvia - Study guides, Class notes & Summaries

Reverse Bias - ANSWER When very little currency can flow in the reverse direction of a diode Variable Resistor - ANSWER Can be used to change the current through a circuit can also be called a rheostat NTC Thermistor - ANSWER (A type of semiconductor) that has decreasing resistance when its temperature increases - negative temperature coefficient Transitional Temperature - ANSWER The critical temperature at and below which a superconductor has zero resistivity Semiconductor - ANSWER ...

Scalar quantity - ANSWER A quantity that has magnitude but no direction Vector quantity - ANSWER A quantity that has both magnitude and direction Newton's First Law - ANSWER An object at rest stays at rest and an object in motion stays in motion with the same velocity unless acted upon by an external force. Newton's Second Law - ANSWER F=ma Newton's Third Law - ANSWER For every action force there is an equal and opposite reaction force Conditions for terminal velocity - A...

Terminal Velocity - ANSWER The constant, maximum velocity of an object when the resistive forces on it are equal and opposite to the accelerating forces Hooke's Law - ANSWER The tension in a spring or wire is proportional to its extension from its natural length, provided the extension is not too great (before elastic deformation) Spring Constant - ANSWER A characteristic of a spring which is defined as the ratio of the force affecting the spring to the displacement caused by it Tens...

Why do emitted electrons have a kinetic energy that varies up to a maximum value? (4) - ANSWER Energy of a photon is fixed/constant (1) Energy is required for electrons to overcome work function ø (1) Electrons deeper into/below the surface of the metal require more energy to overcome work function and therefore have less KE(1) Maximum KE = Energy of photon - work function ø (1) Explain how (bright ring) diagram is evidence of the wave-particle duality of electrons? - ANSWER Diffraction ...

S