Final answer:
Capital letters in transistor parameter symbols typically represent current and voltage. Resistance, measured in ohms, increases when resistors are added in series. Understanding power calculations is crucial for circuit safety and design.
Step-by-step explanation:
In transistor parameter symbols, capital letters usually denote current (I) and voltage (V), while lower case letters often represent instantaneous values or small signal parameters. This naming convention helps distinguish between static or DC conditions and varying or AC conditions in circuits.
The unit for measuring resistance is called the ohm, symbolized by the Greek letter omega (Ω). When resistors are added in series, the total resistance of the circuit increases because the electrical path for the current is extended, resulting in more opposition to the flow of current.
Electric power (P) dissipated in a resistor can be calculated with the formula P = I²R, emphasizing the relationship between power, current (I), and resistance (R). Understanding the calculation of power is essential, as it can determine whether a resistor will withstand the electrical current passing through it without overheating.