the current in a dc circuit composed of 10H colil &100 ohm resistance in series reached 40 percent of the maximum value 20 ms after closing the circuit. calculate the coil resistance.
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Answer:
A RL Series Circuit consists basically of an inductor of inductance, L connected in series with a resistor of resistance, R. A first-order RL circuit is composed of one resistor and one inductor and is the simplest type of RL circuit.
Current in a RL series circuit is given by:
VR(1−e−RtL)VR(1−e−RtL)
t is the time.
The time required for the current flowing in the LR series circuit to reach its maximum steady state value is equivalent to about 5 time constants. This time constant ττ, is measured by τ=L/Rτ=L/R, in seconds,
Answer and Explanation:
Current in a RL series circuit is :
VR(1−e−RtL)R=10V=6L=10mHVR(1−e−RtL)R=10V=6L=10mH
This time constant..
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