AIEEE 2006 | Alternating Current Question 159 | Physics

In an $$AC$$ generator, a coil with $$N$$ turns, all of the same area $$A$$ and total resistance $$R,$$ rotates with frequency $$\omega $$ in a magnetic field $$B.$$ The maximum value of $$emf$$ generated in the coil is

$$N.A.B.R.$$$$\omega $$

$$N.A.B$$

$$N.A.B.R.$$

$$N.A.B.$$$$\omega $$

AIEEE 2006

MCQ (Single Correct Answer)

-1

In a series resonant $$LCR$$ circuit, the voltage across $$R$$ is $$100$$ volts and $$R = 1\,k\Omega $$ with $$C = 2\mu F.$$ The resonant frequency $$\omega $$ is $$200$$ $$rad/s$$. At resonance the voltage across $$L$$ is

$$2.5 \times {10^{ - 2}}V$$

$$40$$ $$V$$

$$250$$ $$V$$

$$4 \times {10^{ - 3}}V$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

The self inductance of the motor of an electric fan is $$10$$ $$H$$. In order to impart maximum power at $$50$$ $$Hz$$, it should be connected to a capacitance of

$$8\mu F$$

$$4\mu F$$

$$2\mu F$$

$$1\mu F$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

The phase difference between the alternating current and $$emf$$ is $${\pi \over 2}.$$ Which of the following cannot be the constituent of the circuit?

$$R,L$$

$$C$$ alone

$$L$$ alone

$$L, C$$

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