# Electronics Calculations

**B**- An abbreviation of bel, the logarithm of the ratio of two powers. The decibel is one tenth of a bel.
**bel**- The bel is the logarithm of the ratio of two powers, and the decibel is one tenth of a bel.
**Decibel**- The human ear responds logarithmically and it is convenient to deal in logarithmic units in audio systems.
**Resistance**- The electrical resistance of a conductor.
**Resistor**- Passive component with a known resistance. The value of resistance is usually shown by a set of coloured bands on the body of the component.

**Subjects: ** Electronics