Question
Download Solution PDFThe maximum permissible current through a resistor is 250 mA. If the resistor is rated as R Ω, 0.5 W, then find the value of R.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
The power rating of a resistor: The power rating of a resistor is the specification given with a resistor that serves to tell the maximum amount of power that the resistor can withstand. At this value, the current is maximum through the resistor.
\({{P}_{rating}}=I_{rated}^{2}R\)
Calculation:
Given Prated = 0.5 watt
Irated = 250 mA
\(R=\frac{{{P}_{rated}}}{I_{rated}^{2}}=\frac{0.5}{250 \times 250 \times (10^{-3})^2}\)
R = 8 ΩLast updated on May 9, 2025
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