Flashcards
Unit 1&2: Definitions
Cards in this deck (42)
- 1Potential Difference (P.D.)The electrical energy transferred per unit charge when electrical energy is converted into another form of energy
- 2Ammetera component to measure electric current
- 3Acceleration of Freefall9.81 ms-1
- 4Absorption spectraA spectrum of dark lines across the pattern of spectral colours colours produced when light passes through a gas and the gas absorbs certain frequencies.
- 5Mean Electron DriftAverage velocity that the electrons travel down the material
- 6ChargeCurrent* Time (C)
- 71 CoulombTotal charge supplied by a current of one ampere in a time of one second (C)
- 8Kirchhoff's First lawThe sum of the currents entering a junction = sum of current leaving the junction
- 9Electromotive Force (E.M.F.)The energy transferred per unit charge when one other type of energy is converted into electrical energy (V)
- 10Ohms LawCurrent is proportional to the P.D provided physical conditions remain constant
- 11Resistivity (P)P=RA/L
- 12Kilowatt-hour (kWh)1000 Watts for 3600 seconds = 3.6x10(6)
- 13Resistance of a Series circuitR(t)= R(1)+R(2)
- 14Resistance of a parallel circuit1/R(t)=1/R(1) + 1/R(2)
- 15Kirchhoff's second lawIn any closed loop in a circuit the sum of the E.M.F = sum of the P.D.
- 16Wavelength (Lambda) (m)The smallest distance between 2 points that have the same pattern of oscillation.
- 17Period (T) (s)The time taken to complete one pattern of oscillation
- 18Frequency (f) (Hz)Number of oscillations per unit time at any point
- 19Displacement (x) (m)The distance any part of the wave has moved from its mean position
- 20Amplitude (x) (m)The maximum displacement
- 21Kinetic EnergyWork an object can do by virtue of speed
- 22PowerThe rate of doing work
(W) - 231 Watt1 joule per second
(Js-1, W) - 24StressForce per unit cross sectional area
(Nm-2, Pa) - 25StrainExtension per unit length
(No Unit) - 26CouplePair of equal and parallel but opposite forces. Tends to produce rotation
- 27Moment of a ForceForce * Perpendicular Distance from a stated point.
(Nm) - 28DensityMass per unit volume
(Kgm-3) - 29PressureForce per unit area
(Nm-2, Pa) - 30JouleWork done when a force of 1 N moves its point of application 1 m in the direction of the force
(J) - 31EnergyThe stored ability to do work
(J) - 32Conservation of EnergyWhere energy may be transferred from one form to another but cannot be created or destroyed
- 33Gravitational Potential EnergyThe energy stored in an object by virtue of its position in a gravitational field.
(J) - 34SpeedDistance per unit time
(ms-1) - 35DisplacementDistance moved in a stated direction
(m) - 36VelocityDisplacement per unit Time
(ms-1) - 37Instantaneous SpeedSpeed at an instant in time
(ms-1) - 38AccelerationRate of change of velocity
(ms-2) - 39One NewtonThe force that causes one Kg to have an acceleration of 1ms-1
(Kgms-1, N) - 40WeightGravitational force on a body
(N) - 41Scalar QuantityA quantity with just a magnitude
- 42Vector QuantityA quantity with both magnitude and direction
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- Physics Flashcards on Unit 1&2: Definitions, created by cmbj on 11/04/2013.
- Created by
- cmbj · Apr 2013
- Updated
- Nov 28, 2016
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