MHT-CET SERIES Physics
Alternating Current
31 previous year questions.
Volume: 31 Ques
Yield: High
High-Yield Trend
7
2025 2
2024 2
2022 14
2020 2
2018 1
2016 1
2010 1
2006 1
2005 Chapter Questions 31 MCQs
01
PYQ 2005
easy
physics ID: mht-cet-
In series L-C-R circuit, the capacitance is changed from C to 2C. The inductance should be changed from L to ... to obtain same resonance frequency.
1
4L
2
L/2
3
L/4
4
2L
02
PYQ 2006
medium
physics ID: mht-cet-
ln an AC circuit, the current lags behind the voltage by /3. The components of the circuit are
1
R and L
2
L and C
3
R and C
4
only R
03
PYQ 2010
medium
physics ID: mht-cet-
Average power in the circuit depends upon
1
current
2
phase difference only
3
emf
4
current, emf and phase difference
04
PYQ 2016
medium
physics ID: mht-cet-
Alternating current of peak value ampere flows through the primary coil of the transformer. The coefficient of mutual inductance between primary and secondary coil is 1 henry. The peak e.m.f. induced in secondary coil is (Frequency of )
1
2
3
4
05
PYQ 2018
medium
physics ID: mht-cet-
An ideal transformer converts a.c. to a.c. to transmit a power of . If primary coil has turns, then alternating current in secondary coil is
1
2
3
4
06
PYQ 2018
easy
physics ID: mht-cet-
An alternating voltage volt is connected to capacitor through AC ammeter. The reading of ammeter is
1
2
3
4
07
PYQ 2020
medium
physics ID: mht-cet-
In series LCR circuit, resistance is 18 and impedance is 33 . An r.m.s. voltage of 220 V is applied across the circuit. The true power consumed in a.c. circuit is
1
400 V
2
600 V
3
800 V
4
200 V
08
PYQ 2020
medium
physics ID: mht-cet-
A sonometer wire of length is in resonance with a frequency 250 Hz. If the length of wire is increased to , then 2 beats per second are heard. The ratio of lengths of wire will be
1
2
3
4
09
PYQ 2020
medium
physics ID: mht-cet-
Assuming the earth to be a sphere of uniform density, the ratio of acceleration due to gravity on the earth's surface to its value at halfway towards the centre of the earth, will be
1
2
3
4
10
PYQ 2020
medium
physics ID: mht-cet-
A stone of mass attached at one end of a long string is whirled in a horizontal circle. The string makes an angle of with the vertical. Then the centripetal force acting on the stone is ( , )
1
2
3
4
11
PYQ 2020
medium
physics ID: mht-cet-
In a series LCR circuit at resonance, the applied e.m.f. of the source and current in the circuit are:
1
out of phase.
2
differ in phase by rad.
3
in phase.
4
differ in phase by rad.
12
PYQ 2020
medium
physics ID: mht-cet-
The phase difference between the voltage and the current in an a.c. circuit is . If the frequency is 50 Hz, then the phase difference is equivalent to a time of:
1
2
3
4
13
PYQ 2020
medium
physics ID: mht-cet-
In the differential equation of linear simple harmonic motion , the term represents
1
restoring force per unit mass per unit displacement
2
restoring force per unit displacement
3
restoring force per unit mass
4
acceleration per unit mass per unit displacement
14
PYQ 2020
medium
physics ID: mht-cet-
An alternating current of frequency 50 Hz has the peak value as 14.14 A. The time taken by the alternating current in reaching from zero to maximum value and r.m.s. value of current will be respectively
1
0.025 s, 5 A
2
0.005 s, 5 A
3
0.005 s, 10 A
4
0.025 s, 10 A
15
PYQ 2020
medium
physics ID: mht-cet-
A resistance of , inductor of self-inductance and a capacitor of unknown capacitance are connected in series to an a.c. source of and . When the current and voltage are in phase, the capacitance and power dissipated respectively are
1
2
3
4
16
PYQ 2020
medium
physics ID: mht-cet-
The density of a metal at normal pressure is . When it is subjected to an excess pressure, the density becomes . If is the bulk modulus of the metal, then the ratio is
1
2
3
4
17
PYQ 2020
medium
physics ID: mht-cet-
An ammeter of resistance 20 gives full scale deflection when 1 mA current flows through it. What is the maximum current that can be measured by connecting 4 resistors each of 16 in parallel with the meter?
1
6 mA
2
8 mA
3
4 mA
4
2 mA
18
PYQ 2020
medium
physics ID: mht-cet-
In an LCR circuit, inductive reactance is and capacitive reactance is . The resistance is found to be . The probable impedance of the combination is
1
2
3
4
19
PYQ 2020
medium
physics ID: mht-cet-
In a capacitive circuit, the reactance of capacitor at frequency is . What will be its reactance at frequency ?
1
2
3
4
20
PYQ 2020
medium
physics ID: mht-cet-
An alternating e.m.f. is given by . In what time the e.m.f. will have half its maximum value, if starts from zero? (T = Time period)
1
2
3
4
21
PYQ 2022
easy
physics ID: mht-cet-
In LCR series resonance circuit, choose the wrong statement
1
Resonance occurs at XL = XC
2
At resonance, current has a maximum value
3
At resonance, circuit is purely inductive
4
At resonance, impedance is minimum
22
PYQ 2022
easy
physics ID: mht-cet-
A condenser of capacity ‘C’ is charged to a potential difference of ‘V1’. The plates of the condenser are then connected to an ideal inductor of inductance ‘L’. The current through an inductor when the potential difference across the condenser reduces to ‘V2’ is
1
2
3
4
23
PYQ 2024
medium
physics ID: mht-cet-
A series LCR circuit is subjected to an AC signal of . If the voltage across the inductor ( ) is , then the current in this circuit is:
1
2
3
4
24
PYQ 2024
medium
physics ID: mht-cet-
In an a.c. circuit, voltage and current are given by:
The average power dissipated in one cycle is:
1
2
3
4
25
PYQ 2025
medium
physics ID: mht-cet-
When a capacitor is connected in series LR circuit, the alternating current flowing in the circuit}
1
remains constant
2
increases
3
decreases
4
is zero
26
PYQ 2025
medium
physics ID: mht-cet-
In the case of constant ' ' and ' ' of a transistor ( and are current ratios)
1
2
3
4
27
PYQ 2025
medium
physics ID: mht-cet-
If ' ' and ' ' are the wavelengths of the first member of the Balmer and Paschen series, in hydrogen atom respectively, then the ratio of respective frequencies, , is
1
2
3
4
28
PYQ 2025
medium
physics ID: mht-cet-
The de-Broglie wavelength of a neutron at is ' '. What will be its wavelength at ?
1
2
3
4
29
PYQ 2025
easy
physics ID: mht-cet-
In an LC circuit, the inductance is and the capacitance is . What is the frequency of oscillation of the circuit?
1
2
3
4
30
PYQ 2025
easy
physics ID: mht-cet-
An AC voltage is applied across a capacitor of capacitance . What is the rms value of the current through the capacitor?
1
2
3
4
31
PYQ 2025
hard
physics ID: mht-cet-
Given the voltage equation and capacitance , calculate the RMS current.
1
2
3
4
About Alternating Current - MHT-CET
Alternating Current is a vital chapter for MHT-CET aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.
By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.
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