AIEEE 2011 | Alternating Current Question 95 | Physics

AIEEE 2011

MCQ (Single Correct Answer)

-1

A resistor $$'R'$$ and $$2\mu F$$ capacitor in series is connected through a switch to $$200$$ $$V$$ direct supply. Across the capacitor is a neon bulb that lights up at $$120$$ $$V.$$ Calculate the value of $$R$$ to make the bulb light up $$5$$ $$s$$ after the switch has been closed. $$\left( {{{\log }_{10}}2.5 = 0.4} \right)$$

$$1.7 \times {10^5}\,\Omega $$

$$2.7 \times {10^6}\,\Omega $$

$$3.3 \times {10^7}\,\Omega $$

$$1.3 \times {10^4}\,\Omega $$

AIEEE 2010

MCQ (Single Correct Answer)

-1

In the circuit shown below, the key $$K$$ is closed at $$t=0.$$ The current through the battery is AIEEE 2010 Physics - Alternating Current Question 95 English

AIEEE 2010 Physics - Alternating Current Question 95 English

$${{V{R_1}{R_2}} \over {\sqrt {R_1^2 + R_2^2} }}$$ at $$t=0$$ and $${V \over {{R_2}}}$$ at $$t = \infty $$

$${V \over {{R_2}}}$$ at $$\,t = 0$$ and $${{V\left( {{R_1} + {R_2}} \right)} \over {{R_1}{R_2}}}$$ at $$t = \infty $$

$${V \over {{R_2}}}$$ at $$\,t = 0$$ and $${{V{R_1}{R_2}} \over {\sqrt {R_1^2 + R_2^2} }}$$ at $$t = \infty $$

$${{V\left( {{R_1} + {R_2}} \right)} \over {{R_1}{R_2}}}$$ at $$t=0$$ and $${V \over {{R_2}}}$$ at $$t = \infty $$

AIEEE 2007

MCQ (Single Correct Answer)

-1

In an $$a.c.$$ circuit the voltage applied is $$E = {E_0}\,\sin \,\omega t.$$ The resulting current in the circuit is $$I = {I_0}\sin \left( {\omega t - {\pi \over 2}} \right).$$ The power consumption in the circuit is given by

$$P = \sqrt 2 {E_0}{I_0}$$

$$P = {{{E_0}{I_0}} \over {\sqrt 2 }}$$

$$P=zero$$

$$P = {{{E_0}{I_0}} \over 2}$$

AIEEE 2006

MCQ (Single Correct Answer)

-1

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

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

$$N.A.B$$

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

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

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