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Alternating Current

AIPMT 2002MCQEasyNot asked in last 5 yrs+4−1
Ques. 1AIPMT 2002

For a series LCR circuit the power loss at resonance is

  1. V2 [ L - 1 C ]
  2. I2L
  3. I2R
  4. V2C

Answer

(3) I2R

Solution

Average power: P = VrmsIrms

At resonance XL = XC Z = R, = 1

P = VI = I2R (power is lost only in the resistor)

Answer: (3)

Keep practising — Alternating Current

Ques. 2AIPMT 2001

A capacitor of capacity C has reactance X. If capacitance and frequency become double then reactance will be

  1. 4X
  2. X/2
  3. X/4
  4. 2X
Ques. 3AIPMT 2001

The value of quality factor is

  1. LR
  2. 1 RC
  3. LC
  4. L/R

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