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38 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Intensity of Current |
Rate of flow of charges upon time |
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1 Ampere |
Intensity of current produced by 1 coulomb of charge in 1 second |
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Current Density |
amount of current passing through a particular area |
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J |
current density |
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Ohms Law |
I = RV |
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Graph of V vs I |
A straight line inclined towards the V axis |
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Resistance Of a conductor |
opposition offered by the conductor to the flow of electric current through it |
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1 Ohm |
Resistance offered by a conductor of voltage 1 Volt to the current of intensity 1 ampere |
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Examples of Ohmic Conductors |
Copper, Aluminium etc. |
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Examples of non ohmic conductors |
semiconductors |
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Dependency of resistance on temperature |
R = r(1 + αΔT) |
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Series combination |
end to end connection |
current is same |
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parallel combination |
positive terminal connected with positive terminal |
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same current, different voltage |
series combination |
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different current, same voltage |
parallel combination |
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equivalent resistance in series combination |
R = R1 + R2 (higher than the highest) |
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Equivalent resistance in parallel combination |
1/R = 1/R1 + 1/R2 (lower than the lowest) |
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Drift Speed |
average speed of charge carriers inside a conductor (it is denoted by Vd) |
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emf |
maximum potential difference between the two electrodes of the cell when no current is drawn |
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potential difference |
difference of potential between any two points in a closed circuit |
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while charging a cell, the potential difference is ________ than the emf |
greater |
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while discharging a cell, the potential difference is ________ than the emf
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lesser |
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Circuit Equation |
I = E/R+r (where I is current, E is emf, R is resistance of circuit and r is resistance of cell or internal resistance) |
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Internal resistance |
opposition offered by the electrolyte of the cell to the flow of current through it |
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Internal resistance of cells in terms of EMF, voltage and external resistance |
r = (E/V-1)R |
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Voltage of cell while discharging |
V = E - Ir |
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voltage of cell while charging |
V = E + Ir |
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Equivalent resistance of cells in series combination |
Back (Definition) |
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equivalent EMF of cells in series combination |
Back (Definition) |
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equivalent resistance of cells in parallel combination |
Back (Definition) |
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Equivalent EMF of cells in parallel combination |
Equivalent EMF of cells in parallel combination |
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Equivalent EMF of cells in parallel combination |
Equivalent EMF of cells in parallel combination |
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Kirchhoff’s Rule |
Analyses circuits |
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Junction rule (Kirchhoff’s rule) |
Total current at any junction is always zero |
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Wheatstone principle |
If the ratio of the resistors on one side is equal to the ratio of the resistor on the other side of a quadrilateral then the intensity of the current through the Galvanometer in the middle is zero |
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Wheatstone principle |
If the ratio of the resistors on one side is equal to the ratio of the resistor on the other side of a quadrilateral then the intensity of the current through the Galvanometer in the middle is zero |
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Meter Bridge |
It is an application of the wheatstone bridge that is used to find an unknown resistance |
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Potentiometer |
it is an application of the wheatstone bridge which functions as a more sensitive voltmeter |
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