Formula list for D.c Circuits
Ohm's Law
| Voltage (V): |
?
Enter voltage in Volts(V)
|
| Resistance (R): |
?
Enter resistance in Ohms(Ω)
|
| Current (I): |
| Current (I): |
?
Enter current in Amperes(A)
|
| Resistance (R): |
?
Enter resistance in Ohms(Ω)
|
| Voltage (V): |
| Voltage (V): |
?
Enter voltage in Volts(V)
|
| Current (I): |
?
Enter current in Ampere(A)
|
| Resistance (R): |
Power
| Voltage (V): |
?
Enter voltage in Volts(V)
|
|
|---|---|---|
| Resistance (R): |
?
Enter resistance in Ohms(Ω)
|
| Power (P): |
|---|
| Current (I): |
?
Enter current in Amperes(A)
|
|
|---|---|---|
| Resistance (R): |
?
Enter resistance in Ohms(Ω)
|
| Power (P): |
|---|
| Voltage (V): |
?
Enter voltage in Volts(V)
|
|
|---|---|---|
| Current (I): |
?
Enter current in Ampere(A)
|
| Power (P): |
|---|
Voltage
| Power (P): |
?
Enter power in Watts(W)
|
|
|---|---|---|
| Current (I): |
?
Enter current in Amperes(A)
|
| Voltage (V): |
|---|
| Power (P): |
?
Enter power in Watts(W)
|
|
|---|---|---|
| Resistance (R): |
?
Enter resistance in Ohms(Ω)
|
| Voltage (V): |
|---|
| Current (I): |
?
Enter current in Amperes(A)
|
|
|---|---|---|
| Resistance (R): |
?
Enter resistance in Ohms(Ω)
|
| Voltage (V): |
|---|
Current
| Voltage (V): |
?
Enter voltage in Volts(V)
|
|
|---|---|---|
| Resistance (R): |
?
Enter resistance in Ohms(Ω)
|
| Current (I): |
|---|
| Power (P): |
?
Enter current in Amperes(A)
|
|
|---|---|---|
| Voltage (V): |
?
Enter voltage in Volts(V)
|
| Current (I): |
|---|
| Power (P): |
?
Enter power in Watts(W)
|
|
|---|---|---|
| Resistance (R): |
?
Enter resistance in Ohms(Ω)
|
| Current (I): |
|---|
Resistance
| Voltage (V): |
?
Enter voltage in Volts(V)
|
|
|---|---|---|
| Current (I): |
?
Enter current in Amperes(A)
|
| Resistance (R): |
|---|
| Power (P): |
?
Enter power in Watts(W)
|
|
|---|---|---|
| Current (I): |
?
Enter current in Amperes(A)
|
| Resistance (R): |
|---|
| Voltage (V): |
?
Enter voltage in Volts(V)
|
|
|---|---|---|
| Power (P): |
?
Enter current in Ampere(A)
|
| Resistance (R): |
|---|
Efficiency
η = (power out / power in) ×100%
| Power out: |
?
Enter power out
|
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|---|---|---|
| Power in: |
?
Enter power in
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| Efficiency (η): |
|---|
Cable resistance and conductance
R = (ρl)/A
| Resistivity (ρ): |
?
Enter resistivity in ohm-meters
|
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|---|---|---|
| Length (l): |
?
Enter length in meters
|
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| Cross-sectional area (A): |
?
Enter cross-sectional area in square meters
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| Resistance (R): |
|---|
R = Rref (1 + α (T - Tref))
| Resistance (Rref): |
?
Resistance at reference temperature (Tref)
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|---|---|---|
| Temp coefficient (α): |
?
Temperature coefficient at Tref
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| Temperature (T): |
?
Temperature
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| Temperature reference (Tref): |
?
Temperature reference Tref
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| Resistance (R): |
|---|
Conductance: G = 1 / R
| Resistance (R): |
?
Resistance (R)
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|---|
| Conductance (G): |
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