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IB Physics: Topic 5 Mr.H
Terms in this set (27)
Amount of Charge past a specific point in a given time frame
ratio of the voltage applied to the electric current which flows through it:
power, voltage and current.
power, current and resistance.
power, voltage and resistance.
Internal resistance and EMF of a cell
resistors in series.
resistors in parallel.
some of the power/energy delivered by a cell is used/dissipated in driving the current through the cell itself;
the power loss can be equated to I^2r where r represents the internal resistance of the cell.
difference in work done per unit charge in moving a small positive test charge from infinitely far away to two points.
the energy gained by an electron when accelerated through an electric field with a potential difference of 1V;
the potential difference is (directly) proportional to current / the ratio of potential difference to current is a constant called resistance / the resistance of a conductor is constant provided its temperature is
Electomotive Force (Cell)
Total amount of chemical energy converted to electrical energy over charge passed
a circuit used to provide a fixed potential difference at a value between 0 and the emf of the power supply
Conservation of charge
the principle that the total electric charge of a system is constant
Electric field strength ( E= F/q)
Electric field strength at a point is the fore per unit charge experienced by a small positive test charge at that point
the time rate of flow of electric charge, in the direction that a positive moving charge would take and having magnitude equal to the quantity of charge per unit time: measured in amperes.
Drift Velocity( I= qnAv)
The speed at which the charge carriers move along the conductors. ( I= qnAv)
The amount that an object impedes an electric current, which is the flow of electrons, and it is measured in units of Ohms.
Right hand corkscrew rule
Right hand thumb along direction of current, fingers curl in direction of the magnetic field
Pole directions on solenoids
S (clockwise) or N(anti-clockwise)
Flemmings left hand rule
Magnetic field strength
the amount of magnetic flux in a unit area perpendicular to the direction of magnetic flow
Amount of energy converted into other types over charge passed
Work done per unit charge in bringing a small positive test charge from infinitely far away to a specific point in an electric field
Electric potential Energy
Work in done in moving a positive charge from Plate A to Plate B in a uniform electric field.
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