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

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It is known that:

=

Electromotive force - potential difference

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It is known that:

=

Current intensity (strength)

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It is known that:

=

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

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It is known that:

=

Electric current density

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It is known that:

=

Electric current density

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It is known that:

=

Resistance

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It is known that:

=

Electrical conduction

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It is known that:

=

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

Find
It is known that:

=

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

Find
It is known that:

=

Specific conduction

Find
It is known that:

=

Connection in series: current intensity

Find
It is known that:

=

Connection in series: voltage

Find
It is known that:

=

Connection in series: resistance

Find
It is known that:

=

Parallel connection: current intensity

Find
It is known that:

=

Parallel connection: voltage

Find
It is known that:

=

Parallel connection: current intensity and resistance

Find
It is known that:

=

Parallel connection: current resistance

Find
It is known that:

=

Parallel connection: current resistance

Find
It is known that:

=

Ohm's law

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It is known that:

=

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

Find
It is known that:

=

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

Find
It is known that:

=

Work of electric current

Find
It is known that:

=

Work of electric current

Find
It is known that:

=

Work of electric current

Find
It is known that:

=

Power of electric current

Find
It is known that:

=

Power of electric current

Find
It is known that:

=

Power of electric current

Find
It is known that:

=

Work and power of electric current

Find
It is known that:

=