1
MHT CET 2024 16th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The alternating voltage is given by $\mathrm{v}=\mathrm{v}_0 \sin \left(\omega \mathrm{t}+\frac{\pi}{3}\right)$ when will be the voltage maximum for first time?

A
$\frac{\mathrm{T}}{6}$
B
$\frac{\mathrm{T}}{3}$
C
$\frac{T}{2}$
D
$\frac{\mathrm{T}}{12}$
2
MHT CET 2024 15th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The core used in transformers are laminated to

A
increase the magnetic field.
B
increase the level of the magnetic saturation of the core.
C
reduce the residual magnetism in the core.
D
reduce eddy current losses in the core.
3
MHT CET 2024 15th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A coil has inductance H . The ratio of its reactance when it is connected first to an a.c. source and then to d.c. source is

A
$\infty$
B
zero
C
one
D
two
4
MHT CET 2024 15th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A resistor of $50 \Omega$, inductor of self inductance $\left(\frac{3}{\pi^2}\right) \mathrm{H}$ and a capacitor of unknown capacity are connected in series to an a.c. source of 100 V and 50 Hz . When the voltage and current are in phase, the value of capacitance is (nearly)

A
$0.66 \times 10^{-4} \mathrm{~F}$
B
$0.33 \times 10^{-4} \mathrm{~F}$
C
$0.66 \times 10^{-2} \mathrm{~F}$
D
$0.33 \times 10^{-2} \mathrm{~F}$
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