1
MHT CET 2024 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

With gradual increase in frequency of an a.c. supply, the impedance of an LCR series circuit

A
increases.
B
decreases.
C
remains constant
D
first decreases, becomes minimum and then increases.
2
MHT CET 2024 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

An a.c. voltage source $\mathrm{V}=\mathrm{V}_0 \sin \omega \mathrm{t}$ is connected across resistance ' $R$ ' and capacitance ' $C$ ' in series. It is given that $R=\frac{1}{\omega c}$ and the peak current is $\mathrm{I}_0$. If the angular frequency of the voltage source is changed to $\left(\frac{\omega}{\sqrt{3}}\right)$, then the new peak current in the circuit is

A
$\frac{\mathrm{I}_0}{2}$
B
$\frac{\mathrm{I}_0}{\sqrt{2}}$
C
$ \sqrt{2} \mathrm{I}_0$
D
$\sqrt{3} \mathrm{I}_0$
3
MHT CET 2024 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A transformer has 120 turns in the primary coil and carries 5 A current. Input power is one kilowatt. To have 560 V output, the number of turns in secondary coil will be

A
168
B
200
C
336
D
400
4
MHT CET 2024 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In series LCR circuit, 'R' represents resistance of electric bulb. If the frequency of a.c. supply is doubled, the value of inductance ' $L$ ' and capacitance 'C' should be

A
both doubled.
B
made four times.
C
made eight times.
D
both halved simultaneously.
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