In a L-C-R circuit, the capacitance is made one-fourth, then what should be changed in inductance, so that the circuit remains in resonance?

8 IMES

1/4 times

2 times

4 times

Solution

4 times

In a RLC circuit , resonance phenomenon occurs when X_L =X_C or $ω_{o} = \frac{1}{\sqrt{LC}} .$

$Resonance frequency = \frac{1}{2 π \sqrt{LC}} For the circuit to remain in resonance \sqrt{LC} = constant \Rightarrow L_{1} C_{1} = L_{2} C_{2} \Rightarrow LC = L_{2} \frac{C}{4} \Rightarrow L_{2} = 4 L$

Inductance should be changed to four times.

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In a L-C-R circuit, the capacitance is made one-fourth, then what should be changed in inductance, so that the circuit remains in resonance?

8 IMES

1/4 times

2 times

4 times

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Alternating Current

In a L-C-R circuit, the capacitance is made one-fourth, then what should be changed in inductance, so that the circuit remains in resonance? 8 IMES 1/4 times 2 times 4 times

Some More Questions From Alternating Current Chapter

A current I flows along the length of an infinitely long, straight, thin walled pipe. Then

The phase difference between the alternating current and emf is π/2. Which of the following cannot be the constituent of the circuit?

Alternating current can not be measured by D.C. ammeter because

In an LCR series a.c. circuit, the voltage across each of the components, L, C and R is 50 V. The voltage across the LC combination will be

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

In a L-C-R circuit, the capacitance is made one-fourth, then what should be changed in inductance, so that the circuit remains in resonance?

8 IMES

1/4 times

2 times

4 times