MHT CET 2019 3rd May Morning Shift | Alternating Current Question 180 | Physics

A 220 V input is supplied to a transformer. The output circuit draws a current of 2.0 A at 440 V . If the ratio of output to input power is 0.8 , then the current drawn by primary winding is

3.6 A

5.0 A

2.5 A

2.8 A

MHT CET 2019 3rd May Morning Shift

MCQ (Single Correct Answer)

-0

A coil has inductance 2 H . The ratio of its reactance, when it is connected first to an $A C$ source and then to DC source, is

zero

less than 1

infinity

MHT CET 2019 2nd May Evening Shift

MCQ (Single Correct Answer)

-0

An alternating voltage is given by $E=100 \sin \left(\omega+\frac{\pi}{6}\right) \mathrm{V}$. The voltage will be maximum for the first time when is [ $T=$ periodic time)

$\frac{T}{12}$

$\frac{T}{2}$

$\frac{T}{6}$

$\frac{T}{3}$

MHT CET 2019 2nd May Morning Shift

MCQ (Single Correct Answer)

-0

In a series $L C R$ circuit $R=300 \Omega, L=0.9 \mathrm{H}$, $C=2 \mu \mathrm{~F}, \omega=1000 \mathrm{rad} / \mathrm{s}$. The impedance of the circuit is

$500 \Omega$

$1300 \Omega$

$400 \Omega$

$900 \Omega$

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