TestUstad
Moderate

Which of following is possible combination for resonance?

Correct answer: A. 4L, C/4

  • A. 4L, C/4
  • B. 2C, 2L
  • C. 4L, 4C
  • D. 2L, 4C

Explanation

Resonance in an RLC circuit occurs when the inductive reactance (XL = ωL) is equal to the capacitive reactance (XC = 1/ωC). For resonance, the product of inductance (L) and capacitance (C) should remain constant. In Option A, changing L to 4L and C to C/4 keeps LC constant, making this the correct option for achieving resonance. The other options do not maintain this balance:Option B changes both L and C equally, which does not affect the ratio needed for resonance.Option C scales both L and C equally, maintaining the same ratio as before.Option D disrupts the balance needed for resonance by mismatching the inductance and capacitance scaling.

Last updated

About Alternating Current

Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.

Practise Alternating Current

592 free Alternating Current MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.

Start a free Alternating Current testAll Alternating Current MCQs

Exams that ask Physics questions like this

Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.

NET Physics60 MCQsNUMS Physics40 MCQsAKU Physics36 MCQsDUHS Physics36 MCQsETEA MDCAT Physics36 MCQsKMU Physics36 MCQsMDCAT Physics36 MCQsECAT Physics30 MCQsETEA Engineering Admission Test Physics30 MCQsGIKI Physics30 MCQsNED Physics30 MCQsPIEAS Physics30 MCQsPMD Physics25 MCQs

Related questions

220V, 50 Hz AC supply is connected across a resistor of 50 k ohms. The current at time t Seconds, assuming that it is zero at t = O, is?

220V, 50 Hz AC supply is connected across a resistor of 50 k ohms. The current at time t Seconds, assuming that it is zero at t = O, is?

A 10 Ω resistor and a 40 μF capacitor are connected in parallel to a 110 V, 50 Hz AC supply. The total current is:

A 100 μF capacitor is connected to a 120 V (rms) AC source at 50 Hz. What is the rms current in the circuit?

A 100 μf capacitor will offer a reactance of: