Here are given some commonly used Electricity formula and also the pictorial representation which may be helpful for you.

Quantity |
Formulas | Unit |

Current I |
I = $\frac{Q}{t}$ Q = Charge t = time taken |
Amperes (A) |

Voltage V | V = $\frac{E}{Q}$ or V = $\frac{W}{Q}$ E = Energy, W = Work done |
Volts (V) |

Resistance R | R = $\frac{\rho l}{A}$ $\rho$ = Resistivity, l = length, A = Area |
Ohm ($\Omega$) |

Resistance R | R = $\frac{V}{I}$ |
ohm ($\Omega$) |

Power P | P = VI |
Watts (W) |

Conductivity $\sigma$ | $sigma$ = $\frac{1}{\rho}$ |
Siemens per meter (S/m) |

Related Calculators | |

Electric Field Calculator | Acceleration Formula Calculator |

Area of a Circle Formula Calculator | Area of a Cylinder Formula Calculator |

Below are given problems based on electricity which may be helpful for you.

Given: Resistance R = 60 $\Omega$, Voltage V = 220 V,

The current is given by I = $\frac{V}{R}$

= $\frac{220}{60}$

= 3.667 A.

Current I = 0.5 A,

Time taken t = 3 hours = 3 $\times$ 3600 = 10800 s,

Charge Q = I $\times$ t = 0.5 $\times$ 10800 = 5400 C