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Question

For an LCR series AC circuit match the following two columns.
Column-1 Column-2

(a) If resistance is increased. (p) current will increase.
(b) If capacitance is increased. (q) current will decrease.
(c) If inductance is increased. (r) current may increase or decrease.
(d) If frequency is increased. (s) power may increase or decrease.

A
(a)(q,s) ; (b)(r,s) ; (c)(r,s) ; (d)(r,s)
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B
(a)(p,s) ; (b)(r,s) ; (c)(r,s) ; (d)(p,s)
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C
(a)(p,r) ; (b)(p,s) ; (c)(r,s) ; (d)(r,s)
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D
(a)(p,s) ; (b)(p,s) ; (c)(q,s) ; (d)(r,s)
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Solution

The correct option is A (a)(q,s) ; (b)(r,s) ; (c)(r,s) ; (d)(r,s)
We know , Power across resistor, Prms=i2rmsR

When resistance is increased, current is decreased.

But from above formula, power may increase or decrease.

(a)(q,s)

We know that, I=VR2+(ωL1Cω)2

So, increase in the value of capacitance C, Inductance L or frequency ω may or may not increase the current in the circuit.

(b)(r,s) ; (c)(r,s) ; (d)(r,s)




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