Select the formula for calculation
Quantity of electricity
Ohm law
Electric conduction
Specific resistance
Specific conductance
Dependence resistance on temperature
![Direct-current circuits](/formulae_view/i/h63_2.png)
Electric circuit
Second Kirchhoff rule (circuit rule)
![Direct-current circuits](/formulae_view/i/h63_3.png)
Current branching
![Direct-current circuits](/formulae_view/i/h63_4.png)
Series connection of resistors
![Direct-current circuits](/formulae_view/i/h63_5.png)
Parallel connection of resistors
![Direct-current circuits](/formulae_view/i/h63_6.png)
Voltage divider
![Direct-current circuits](/formulae_view/i/h63_7.png)
Change of ampermeter measurement range
![Direct-current circuits](/formulae_view/i/h63_8.png)
Change of voltmeter measurement range
Work of electric current
Power of electric current
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