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

Ε - electromotive force

A - work

q - charge

A - work

q - charge

Find
It is known that:

=

Electromotive force - potential difference

Ε - electromotive force

φ1 - initial potential

φ2 - final potential

φ1 - initial potential

φ2 - final potential

Find
It is known that:

=

Current intensity (strength)

I - current intensity

q - charge

t - time

q - charge

t - time

Find
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

Find
It is known that:

=

Electric current density

j - current density

I - current intensity

S - cross-sectional area

I - current intensity

S - cross-sectional area

Find
It is known that:

=

Electric current density

j - current density

e - electron charge

n - concentration of charged particles

v - speed (velocity)

e - electron charge

n - concentration of charged particles

v - speed (velocity)

Find
It is known that:

=

Resistance

R - resistance

ρ - specific resistance

l - length

S - cross-sectional area

ρ - specific resistance

l - length

S - cross-sectional area

Find
It is known that:

=

Electrical conduction

λ - electrical conduction

R - resistance

R - resistance

Find
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

σ - specific conduction

ρ - specific resistance

ρ - specific resistance

Find
It is known that:

=

Connection in series: current intensity

I - current intensity

Find
It is known that:

=

Connection in series: voltage

U - voltage

U1, U2 - voltage for series elements

U1, U2 - voltage for series elements

Find
It is known that:

=

Connection in series: resistance

R - resistance

R1, R2 - resistance for series elements

R1, R2 - resistance for series elements

Find
It is known that:

=

Parallel connection: current intensity

I - current intensity

I1, I2 - current intensity for individual elements

I1, I2 - current intensity for individual elements

Find
It is known that:

=

Parallel connection: voltage

U - voltage

Find
It is known that:

=

Parallel connection: current intensity and resistance

I1, I2 - current intensity for individual elements

R1, R2 - resistance for individual elements

R1, R2 - resistance for individual elements

Find
It is known that:

=

Parallel connection: current resistance

R - resistance

R1, R2 - resistance for individual elements

R1, R2 - resistance for individual elements

Find
It is known that:

=

Parallel connection: current resistance

R - resistance

R1, R2 - resistance for individual elements

R1, R2 - resistance for individual elements

Find
It is known that:

=

Ohm's law

I - current intensity

U - voltage

R - resistance

U - voltage

R - resistance

Find
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

A - work

q - charge

U - voltage

q - charge

U - voltage

Find
It is known that:

=

Work of electric current

A - work

I - current intensity

R - resistance

t - time

I - current intensity

R - resistance

t - time

Find
It is known that:

=

Work of electric current

A - work

U - voltage

t - time

R - resistance

U - voltage

t - time

R - resistance

Find
It is known that:

=

Power of electric current

P - current power

U - voltage

I - current intensity

U - voltage

I - current intensity

Find
It is known that:

=

Power of electric current

P - current power

I - current intensity

R - resistance

I - current intensity

R - resistance

Find
It is known that:

=

Power of electric current

P - current power

U - voltage

R - resistance

U - voltage

R - resistance

Find
It is known that:

=

Work and power of electric current

A - work

P - current power

t - time

P - current power

t - time

Find
It is known that:

=