Question:
For given L-R circuit, growth of current as function of time t is shown in graph. Which of the following option represents value of time constant most closely for the circuit?
For given L-R circuit, growth of current as function of time t is shown in graph. Which of the following option represents value of time constant most closely for the circuit?
Updated On: Jan 18, 2023
- 0.4 s
- 0.7 s
- 1 s
- 2.4 s
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The Correct Option is C
Solution and Explanation
In one time constant 63% change occurs in the value of current .The 63% of maximum current is 1.26 A .It is obvious from graph that current 1.26A corresponds to time which is slightly greater than 0.9sec. Hence option having 1s is most appropriate.
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Concepts Used:
LCR Circuit
An LCR circuit, also known as a resonant circuit, or an RLC circuit, is an electrical circuit consist of an inductor (L), capacitor (C) and resistor (R) connected in series or parallel.
Series LCR circuit
When a constant voltage source is connected across a resistor a current is induced in it. This current has a unique direction and flows from the negative to positive terminal. Magnitude of current remains constant.
Alternating current is the current if the direction of current through this resistor changes periodically. An AC generator or AC dynamo can be used as AC voltage source.
