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

In the part of an a.c. circuit as shown, the resistance $$R=0.2 \Omega$$. At a certain instant $$(\mathrm{V_A-V_B})= 0.5 \mathrm{~V}, \mathrm{I}=0.5 \mathrm{~A}$$ and $$\frac{\Delta \mathrm{I}}{\Delta \mathrm{t}}=8 \mathrm{~A} / \mathrm{s}$$. The inductance of the coil is

A
0.04 H
B
0.02 H
C
0.08 H
D
0.05 H
2
MHT CET 2021 24th September Morning Shift
+1
-0

In the circuit shown in the figure, a.c. source gives voltage $$\mathrm{V}=20 \cos (2000 \mathrm{t})$$. Impedance and r.m.s. current respectively will be

A
$$10 \Omega, 0.5 \mathrm{~A}$$
B
$$5 \Omega, 2 \mathrm{~A}$$
C
$$10 \Omega, \sqrt{2} \mathrm{~A}$$
D
$$5 \Omega, 1 \mathrm{~A}$$
3
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
4
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
$$5 \sqrt{3} \mathrm{~V}$$
EXAM MAP
Medical
NEET