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

An e.m.f. $$E=4 \cos (1000 t)$$ volt is applied to an LR circuit of inductance $$3 \mathrm{~mH}$$ and resistance $$4 ~\Omega$$. The maximum current in the circuit is

A
$$\frac{4}{\sqrt{7}} \mathrm{~A}$$
B
$$1.0 \mathrm{~A}$$
C
$$\frac{4}{7} \mathrm{~A}$$
D
$$0.8 \mathrm{~A}$$
2
MHT CET 2023 9th May Evening Shift
+1
-0

An alternating voltage of frequency '$$\omega$$' is induced in electric circuit consisting of an inductance '$$L$$' and capacitance '$$C$$', connected in parallel. Then across the inductance coil

A
current is maximum when $$\omega^2=\frac{1}{\mathrm{LC}}$$
B
current is zero
C
voltage is minimum when $$\omega^2=\frac{1}{\text { LC }}$$
D
voltage is maximum when $$\omega^2=\frac{1}{\mathrm{LC}}$$
3
MHT CET 2023 9th May Evening Shift
+1
-0

The reactance of capacitor at $$50 \mathrm{~Hz}$$ is $$5 \Omega$$. If the frequency is increased to $$100 \mathrm{~Hz}$$, the new reactance is

A
$$5 \Omega$$
B
$$10 \Omega$$
C
$$2.5 \Omega$$
D
$$125 \Omega$$
4
MHT CET 2023 9th May Morning Shift
+1
-0

The coil of an a.c. generator has 100 turns, each of cross-sectional area $$2 \mathrm{~m}^2$$. It is rotating at constant angular speed $$30 ~\mathrm{rad} / \mathrm{s}$$, in a uniform magnetic field of $$2 \times 10^{-2} \mathrm{~T}$$. If the total resistance of the circuit is $$600 ~\Omega$$ then maximum power dissipated in the circuit is

A
$$6 \mathrm{~W}$$
B
$$9 \mathrm{~W}$$
C
$$12 \mathrm{~W}$$
D
$$24 \mathrm{~W}$$
MHT CET Subjects
Physics
Mechanics
Optics
Electromagnetism
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
Calculus
Coordinate Geometry
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