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1
MHT CET 2024 4th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A coil of self inductance L is connected in series with a bulb B and an a.c. source. Brightness of the bulb decreases when

A
frequency of a.c. source is decreased.
B
number of turns in the coil is reduced.
C
a capacitance of reactance $\left(\mathrm{X}_{\mathrm{L}}-\mathrm{X}_{\mathrm{C}}\right)$ is included in the same circuit.
D
an iron rod is inserted in the coil.
2
MHT CET 2024 4th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In series LCR resonant circuit, the capacitance is changed from C to 3 C . To obtain the same resonant frequency, the inductance should be changed from $L$ to

A
$\frac{\mathrm{L}}{3}$
B
$\frac{\mathrm{L}}{2}$
C
$\frac{\mathrm{L}}{\sqrt{3}}$
D
$\mathrm{3 L}$
3
MHT CET 2024 4th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

For the given figure, choose the correct option.

MHT CET 2024 4th May Morning Shift Physics - Alternating Current Question 37 English

A
The r.m.s. current in circuit (B) can never be greater than that in circuit (A)
B
The r.m.s. current in circuit (A) is always equal to that in circuit (B)
C
The r.m.s. current in circuit (B) can be greater than in circuit (A)
D
At resonance, current in (B) is less than that in circuit (A)
4
MHT CET 2024 4th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In LCR series circuit if the frequency is increased, the impedance of the circuit

A
increases
B
decreases
C
either increases or decreases
D
first decreases then become minimum and then increases.
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