1
MHT CET 2023 9th May Morning Shift
+1
-0

A capacitor, an inductor and an electric bulb are connected in series to an a.c. supply of variable frequency. As the frequency of the supply is increased gradually, then the electric bulb is found to

A
increase in brightness.
B
decrease in brightness.
C
increase, reach a maximum and then decrease in brightness.
D
show no change in brightness.
2
MHT CET 2023 9th May Morning Shift
+1
-0

In an $$\mathrm{AC}$$ circuit, the current is $$\mathrm{i}=5 \sin \left(100 \mathrm{t}-\frac{\pi}{2}\right) \mathrm{A}$$ and voltage is $$\mathrm{e}=200 \sin (100 \mathrm{t})$$ volt. Power consumption in the circuit is $$\left(\cos 90^{\circ}=0\right)$$

A
$$200 \mathrm{~W}$$
B
$$0 \mathrm{~W}$$
C
$$40 \mathrm{~W}$$
D
$$1000 \mathrm{~W}$$
3
MHT CET 2021 21th September Evening Shift
+1
-0

In LCR series resonant circuit, at resonance, voltage across 'L' and 'C' will cancel each other because they are

A
90$$^\circ$$ out of phase
B
90$$^\circ$$ in phase
C
180$$^\circ$$ in phase
D
180$$^\circ$$ out of phase
4
MHT CET 2021 21th September Evening Shift
+1
-0

The inductive reactance of a coil is R$$\Omega$$. If the inductance of a coil is doubled and frequency of a.c. supply is also doubled then the new inductive reactance will be

A
2R
B
8R
C
$$\mathrm{\frac{R}{2}}$$
D
4R
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