Electricity Flashcards
Charge
Property of master due to which it produces and experiences electrical and magnetic effects
Charge on electron
1.6 10 power -19
Electrons in 1c of charge
6.25 x 10 power 18
Electric current
Rate of flow of charges thorough any cross section of conductor
Electric potential
Work done to carry a unit positive charge from infinity to a particular point
Potential difference
Work done to carry a unit positive charge from one point to another point
Voltmeter
Connected in parallel
Ideal has infinite resistance
Electric circuit
Closed and continous parth of electric current
Ohm law
It starts that at a constant temp potential difference between 2 points is directly proportional to current
Resistance
Property of conductor which radiates the flow of electrons
Factors affecting resistance
R proportional to rho X length/ area
Also depends on temp
Resistivity
Resistance offered by a conductor power unit dimension
Si ohm metre
Joules hearing effect
When current is passed through a quote having resistance then done part of it is converted to heat which hearts up conductor
Heat formulae
Heat is equal to
I square R T
VIT
Vsq T/R
Power formulae
Power is
Isq R
VI
Vsq/R