AIEEE 2004 | Alternating Current Question 175 | Physics

In a $$LCR$$ circuit capacitance is changed from $$C$$ to $$2$$ $$C$$. For the resonant frequency to remain unchaged, the inductance should be changed from $$L$$ to

$$L/2$$

$$2L$$

$$4L$$

$$L/4$$

AIEEE 2003

MCQ (Single Correct Answer)

-1

The core of any transformer is laminated so as to

reduce the energy loss due to eddy currents

make it light weight

make it robust and strong

increase the secondary voltage

AIEEE 2003

MCQ (Single Correct Answer)

-1

In an oscillating $$LC$$ circuit the maximum charge on the capacitor is $$Q$$. The charge on the capacitor when the energy is stored equally between the electric and magnetic field is

$${Q \over 2}$$

$${Q \over {\sqrt 3 }}$$

$${Q \over {\sqrt 2 }}$$

$$Q$$

AIEEE 2002

MCQ (Single Correct Answer)

-1

In a transformer, number of turns in the primary coil are $$140$$ and that in the secondary coil are $$280.$$ If current in primary coil is $$4A,$$ then that in the secondary coil is

$$4A$$

$$2A$$

$$6A$$

$$10A$$

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