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1
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

For the circuit shown below, instantaneous current through inductor '$$\mathrm{L}$$' and capacitor '$$\mathrm{C}$$' is respectively.

MHT CET 2021 22th September Evening Shift Physics - Alternating Current Question 2 English

A
$$\frac{-\mathrm{e}_0}{\omega \mathrm{L}} \cos \omega \mathrm{t} ; \mathrm{e}_0 \omega \mathrm{c} \cos \omega \mathrm{t}$$
B
$$\frac{-\mathrm{e}_0}{\omega \mathrm{L}} \sin \omega t ; \frac{\mathrm{e}_0}{\omega \mathrm{C}} \cos \omega \mathrm{t}$$
C
$$\frac{\mathrm{e}_0 \mathrm{C}}{\mathrm{L}} \cos \omega \mathrm{t}; \frac{\mathrm{e}_0 \mathrm{~L}}{\mathrm{C}} \sin \omega \mathrm{t}$$
D
$$\frac{-\mathrm{e}_0 \mathrm{C}}{\mathrm{L}} \sin \omega \mathrm{t} ; \frac{\mathrm{e}_0 \mathrm{~L}}{\mathrm{C}} \cos \omega \mathrm{t}$$
2
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A parallel plate capacitor having plates of radius 6 cm has capacitance 100 pF. It is connected to 230 V a.c. supply with angular frequency 300 rad/s. The r.m.s. value of current is

A
$$6.9\times10^{-6}$$ A
B
$$2.3\times10^{-5}$$ A
C
$$6.9\times10^{-5}$$ A
D
$$6.9\times10^{-7}$$ A
3
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A step down transformer has turns ratio $$20: 1$$. If $$8 \mathrm{~V}$$ is applied across $$0.4 \mathrm{~ohm}$$ secondary then the primary current will be

A
2 A
B
1 A
C
0.5 A
D
4 A
4
MHT CET 2021 21th September Evening Shift
MCQ (Single Correct Answer)
+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
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