1
MHT CET 2021 24th September Morning Shift
+1
-0

Which graph shows the correct variation of r.m.s. current 'I' with frequency 'f' of a.c. in case of (LCR) parallel resonance circuit?

A
Q
B
P
C
R
D
S
2
MHT CET 2021 24th September Morning Shift
+1
-0

The peak value of an alternating emf '$$\mathrm{e}$$' given by $$\mathrm{e}=\mathrm{e}_0 \cos \omega \mathrm{t}$$ is 10 volt and its frequency is $$50 \mathrm{~Hz}$$. At time $$\mathrm{t}=\frac{1}{600} \mathrm{~s}$$, the instantaneous e.m.f is $$\left(\cos \frac{\pi}{6}=\sin \frac{\pi}{3}=\frac{\sqrt{3}}{2}\right)$$

A
$$10 \mathrm{~V}$$
B
$$\frac{1}{\sqrt{3}} \mathrm{~V}$$
C
$$5 \mathrm{~V}$$
D
$$5 \sqrt{3} \mathrm{~V}$$
3
MHT CET 2021 23rd September Evening Shift
+1
-0

A circuit containing resistance R$$_1$$, inductance L$$_1$$ and capacitance C$$_1$$ connected in series resonates at the same frequency 'f$$_0$$' as another circuit containing R$$_2$$, L$$_2$$ and C$$_2$$ in series. If two circuits are connected in series then the new frequency at resonance is

A
$$\mathrm{\frac{3}{4} f_r}$$
B
$$\frac{3}{2} \mathrm{f}_{\mathrm{r}}$$
C
$$\mathrm{2 f_r}$$
D
$$\mathrm{f}_{\mathrm{r}}$$
4
MHT CET 2021 23rd September Evening Shift
+1
-0

A series L-C-R circuit containing a resistance of $$120 ~\Omega$$ has angular frequency $$4 \times 10^5 \mathrm{~rad} \mathrm{~s}^{-1}$$. At resonance the voltage across resistance and inductor are $$60 \mathrm{~V}$$ and $$40 \mathrm{~V}$$ respectively, then the value of inductance will be

A
$$0.2 \mathrm{~mH}$$
B
$$0.4 \mathrm{~mH}$$
C
$$0.8 \mathrm{~mH}$$
D
$$0.6 \mathrm{~mH}$$
EXAM MAP
Medical
NEET