Q.

The value of current in two series LCR circuits at resonance is same. Then

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a

both circuits must be having same value of capacitance and inductance

b

in both circuits ratio of L and C will be same

c

for both the circuits XL/XC must be same at that frequency

d

both circuits must have same impedance at all frequencies

answer is C.

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Detailed Solution

XL = XC at resonanceXLXC=1 for both circuits.Impedance may be different if applied voltage is different.
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The value of current in two series LCR circuits at resonance is same. Then