iCON Education - Alternating Current AIIMS Test

Question 1: Palette 1/8

AIIMS 2019 MCQ

A transformer with turns ratio $\frac{N_1}{N_2}=\frac{50}{1}$ is connected to a $120 \mathrm{~V}$ AC supply. If primary and secondary circuit resistances are $1.5 \mathrm{~k} \Omega$ and $1 \Omega$ respectively, then find out power of output.

5.76 W

11.4 W

2.89 W

7.56 W

Question 2: Palette 2/8

AIIMS 2019 MCQ

If maximum energy is stored in a capacitor at t = 0, then find the time after which current in the circuit will be maximum.

AIIMS 2019 Physics - Alternating Current Question 8 English

$\frac{\pi}{2} \mathrm{~ms}$

$\frac{\pi}{4} \mathrm{~ms}$

$\pi \mathrm{~ms}$

$2 \mathrm{~ms}$

Question 3: Palette 3/8

AIIMS 2019 MCQ

In a $L C R$ series circuit source voltage is $120 \mathrm{~V}$ and voltage in inductor $50 \mathrm{~V}$ and resistance is $40 \mathrm{~V}$, then determine voltage in the capacitor

$V_C=10(5-8 \sqrt{2})$

$V_C=10(5+8 \sqrt{2})$

$V_C=20(5+8 \sqrt{2})$

$V_C=10(5+7 \sqrt{2})$

Question 4: Palette 4/8

AIIMS 2018 MCQ

In a series R-C circuit shown in figure, the applied voltage is 10 V and the voltage across capacitor is found to be 8V. Then, the voltage across R and the phase difference between current and the applied voltage will respectively be

AIIMS 2018 Physics - Alternating Current Question 1 English

$6 \mathrm{~V}, \tan ^{-1}\left(\frac{4}{3}\right)$

$3 V, \tan ^{-1}\left(\frac{3}{4}\right)$

$6 \mathrm{~V}, \tan ^{-1}\left(\frac{5}{3}\right)$

None of these

Question 5: Palette 5/8

AIIMS 2018 MCQ

An ideal coil of $10 \mathrm{~H}$ is connected in series with a resistance of $5 \Omega$ and a battery of $5 \mathrm{~V}$. After $2 \mathrm{~s}$, after the connection is made, the current flowing (in ampere) in the circuit is

$(1-e)$

$e$

$e^{-1}$

$\left(1-e^{-1}\right)$

Question 6: Palette 6/8

AIIMS 2018 MCQ

In a circuit $L, C$ and $R$ are connected in series with an alternating voltage source of frequency $f$. The current leads the voltage by $45^{\circ}$. The value of $C$ is

$\frac{1}{2 \pi f(2 \pi f L+R)}$

$\frac{1}{\pi f(2 \pi f L+R)}$

$\frac{1}{2 \pi f(2 \pi f L-R)}$

$\frac{1}{\pi f(2 \pi f L-R)}$

Question 7: Palette 7/8

AIIMS 2017 MCQ

A series R-C circuit is connected to AC voltage source. Consider two cases; (A) When C is without a dielectric medium and (B) When C is filled with dielectric of constant 4. The current I$_R$ through the resistor and voltage V$_C$ across the capacitor are compared in two cases.

$I_R^A> I_R^B$

$I_R^A< I_R^B$

$V_C^A< V_C^B$

None of these

Question 8: Palette 8/8

AIIMS 2017 MCQ

Assertion : The average value of alternating emf is $63.39 \%$ of the peak value.

Reason : The rms value of alternating emf is $70.72 \%$ of peak value.

Both assertion and reason are true and reason is the correct explanation of assertion

Both assertion and reason are true but reason is not the correct explanation of assertion

Assertion is true but reason is false

Both assertion and reason are false.