Chapter: Current Electricity
Question
The maximum power a 20Ω resistor can dissipate as heat without being damaged is 2kW.Would you connect this resistor directly a 300V dc source of negligible internal resistance?
Solution
The rated voltage of the resistor is given by,
V² = P x R = 2000 x 20 or, V = 200 V.
Thus, it is not safe to connect the resistor directly across a 300 V source.
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Chapter: Current Electricity
Chapter: Current Electricity
