The smallest load resistor that can be connected across the output terminals of the filter is RI≤864 ohms.
A resistor is a passive two-terminal electrical component used in circuits to implement electrical resistance. Resistors have a variety of purposes in electronic circuits, including lowering current flow, adjusting signal levels, dividing voltages, biasing active components, and terminating transmission lines.
In this questions, we will solve the following:
ω=2πf⇒ f=ω/2π
ω=27000
fc=R/2πL
27000/2π= R/(2π×0.004)
R=108 ohms
Cutoff frequency is determined by for terminated RL filters.
ω=(R || Rl)/ L
24000 ≥ (108 || Rl)/ 0.004
96 ≥ 108Rl/(108+Rl)
864 Ohms Rl
High-power resistors that can generate many watts of heat instead of electrical energy can be utilized as test loads for generators, power distribution systems, and motor controls. With temperature, time, or operating voltage changes, fixed resistors' resistances only slightly fluctuate. Variable resistors can be utilized as force sensors, heat sensors, light sensors, volume controls, lamp dimmers, humidity sensors, and chemical activity sensors.
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