MHT CET 2024 3rd May Evening Shift | Alternating Current Question 40 | Physics

A transformer is used to set up an alternating e.m.f. of 220 V to 4.4 kV to transmit 6.6 kW of power. The primary coil has 1000 turns. The current rating of the secondary coil is (Transformer is ideal)

0.8 A

1.2 A

1.5 A

1.8 A

MHT CET 2024 3rd May Evening Shift

MCQ (Single Correct Answer)

-0

A series LCR circuit containing a resistance ' R ' has angular frequency ' $\omega$ '. At resonance the voltage across resistance and inductor are ' $\mathrm{V}_{\mathrm{R}}$ ' and ' $V_L$ ' respectively, then value of inductance ' $L$ ' will be

$\frac{V_R R}{V_L \omega}$

$\frac{V_L}{V_R R \omega}$

$\frac{V_R \omega}{V_L R}$

$\frac{\mathrm{V}_{\mathrm{L}} \mathrm{R}}{\mathrm{V}_{\mathrm{R}} \omega}$

MHT CET 2024 3rd May Evening Shift

MCQ (Single Correct Answer)

-0

A 42 mH inductor is connected to $200 \mathrm{~V}, 50 \mathrm{~Hz}$ a.c. supply. The r.m.s. value of current in the circuit will be nearly [ Take $\pi=\frac{22}{7}$ ]

$15.15 \mathrm{~A}$

$9.15$ A

$8.15$ A

$6 . 15 \mathrm{~A}$

MHT CET 2024 3rd May Morning Shift

MCQ (Single Correct Answer)

-0

An alternating voltage $\mathrm{v}=200 \sqrt{2} \sin (100 \mathrm{t})$ is connected to a $1 \mu \mathrm{~F}$ capacitor through an a. c. ammeter. The reading of the ammeter shall be

10 mA

20 mA

40 mA

80 mA

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