Electromotive force

Electromotive force - potential difference

Current intensity (strength)

Current intensity (strength)

Electric current density

Electric current density

Resistance

Electrical conduction

Resistance and temperature

Specific resistance

Specific conduction

Connection in series: current intensity

Connection in series: voltage

Connection in series: resistance

Parallel connection: current intensity

Parallel connection: voltage

Parallel connection: current intensity and resistance

Parallel connection: current resistance

Parallel connection: current resistance

Ohm's law

Ohm's law for closed circuit

Ohm's law for closed circuit: many current sources

Work of electric current

Work of electric current

Work of electric current

Power of electric current

Power of electric current

Power of electric current

Work and power of electric current

Electromotive force - potential difference

Current intensity (strength)

Current intensity (strength)

I - current intensity

e - electron charge

n - concentration of charged particles

v - speed (velocity)

S - cross-sectional area

e - electron charge

n - concentration of charged particles

v - speed (velocity)

S - cross-sectional area

Electric current density

Electric current density

Resistance

Electrical conduction

Resistance and temperature

R - resistance

R0 - resistance when temperature is 0 C

α - temperature coefficient of resistance

t - temperature

R0 - resistance when temperature is 0 C

α - temperature coefficient of resistance

t - temperature

Specific resistance

ρ - specific resistance

ρ0 - specific resistance when temperature is 0 C

α - temperature coefficient of resistance

t - temperature

ρ0 - specific resistance when temperature is 0 C

α - temperature coefficient of resistance

t - temperature

Specific conduction

Connection in series: current intensity

Connection in series: voltage

Connection in series: resistance

Parallel connection: current intensity

Parallel connection: voltage

Parallel connection: current intensity and resistance

Parallel connection: current resistance

Parallel connection: current resistance

Ohm's law

Ohm's law for closed circuit

Ε - electromotive force

I - current intensity

R - external resistance

r - inner (internal) resistance of current source

I - current intensity

R - external resistance

r - inner (internal) resistance of current source

Ohm's law for closed circuit: many current sources

n - number of current sources

Ε - electromotive force

I - current intensity

R - external resistance

r - inner (internal) resistance of current source

Ε - electromotive force

I - current intensity

R - external resistance

r - inner (internal) resistance of current source

Work of electric current

Work of electric current

Work of electric current

Power of electric current

Power of electric current

Power of electric current

Work and power of electric current