AIPMT 2005 | Alternating Current Question 57 | Physics

AIPMT 2005

MCQ (Single Correct Answer)

-1

In a circuit L, C and R are connected in series with an alternating voltage source of frquency $$f.$$ The current leads the voltage by 45^o. The value of C is

$${1 \over {\pi f\left( {2\pi f\,L - R} \right)}}$$

$${1 \over {2\pi f\left( {2\pi f\,L - R} \right)}}$$

$${1 \over {\pi f\left( {2\pi f\,L + R} \right)}}$$

$${1 \over {2\pi f\left( {2\pi f\,L + R} \right)}}$$

AIPMT 2004

MCQ (Single Correct Answer)

-1

A coil of 40 henry inductance is connected in series with a resistance of 8 ohm and the combination is joined to the terminals of a 2 volt battery. The time constant of the circuit is

5 seconds

1/5 seconds

40 seconds

20 seconds

AIPMT 2002

MCQ (Single Correct Answer)

-1

For a series LCR circuit the power loss at resonance is

$${{{V^2}} \over {\left[ {\omega L - {1 \over {\omega C}}} \right]}}$$

$${I^2}L\omega $$

$${I^2}R$$

$${{{V^2}} \over {C\omega }}$$

AIPMT 2001

MCQ (Single Correct Answer)

-1

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

X/2

X/4

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