Alternating current is an important topic in the Physics section in MHT CET exam. Practising this topic will increase your score overall and make your conceptual grip on MHT CET exam stronger.
This article gives you a full set of MHT CET PYQs for Alternating current with explanations for effective preparation. Practice of MHT CET Physics PYQs including Alternating current questions regularly will improve accuracy, speed, and confidence in the MHT CET 2026 exam.
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MHT CET PYQs for Alternating current with Solutions
1.
In an LC circuit, the inductance \( L \) is \( 2 \, \text{H} \) and the capacitance \( C \) is \( 4 \, \mu\text{F} \). What is the frequency of oscillation of the circuit?- \( 100 \, \text{Hz} \)
- \( 50 \, \text{Hz} \)
- \( 25 \, \text{Hz} \)
- \( 200 \, \text{Hz} \)
2.
Average power in the $ L-C-R $ circuit depends upon- current
- phase difference only
- emf
- current, emf and phase difference
3.
Given the voltage equation \( V = 100 \sqrt{2} \sin(\omega t) \) and capacitance \( C = 2 \, \mu \text{F} \), calculate the RMS current.- \( 10 \, \text{A} \)
- \( 20 \, \text{A} \)
- \( 50 \, \text{A} \)
- \( 100 \, \text{A} \)
4.
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.- 4L
- L/2
- L/4
- 2L
5.
Alternating current of peak value $\left(\frac{2}{\pi}\right)$ 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 $AC = 50\, Hz$)- $100\,V$
- $200\,V$
- $300\,V$
- $400\,V$
6.
An AC voltage \( V = 50\sqrt{2} \sin(100t) \) is applied across a capacitor of capacitance \( C = 1 \mu F \). What is the rms value of the current through the capacitor?- \( 0.0025 \, \text{A} \)
- \( 0.01 \, \text{A} \)
- \( 0.005 \, \text{A} \)
- \( 0.007 \, \text{A} \)
7.
In an a.c. circuit, voltage and current are given by: \[ V = 100 \sin(100t) \, \text{V} \quad \text{and} \quad I = 100 \sin\left(100t + \frac{\pi}{3}\right) \, \text{mA}. \] The average power dissipated in one cycle is:- \( 10 \, \text{W} \)
- \( 2.5 \, \text{W} \)
- \( 25 \, \text{W} \)
- \( 5 \, \text{W} \)
8.
ln an AC circuit, the current lags behind the voltage by $\pi$/3. The components of the circuit are- R and L
- L and C
- R and C
- only R
9.
An alternating voltage $e = 200 \sqrt{2} \, \sin(100 \, t)$ volt is connected to $1\, \mu F$ capacitor through AC ammeter. The reading of ammeter is- $5\, mA$
- $10\, mA$
- $15 \,mA$
- $20\, mA$
10.
An ideal transformer converts $220\, V$ a.c. to $3.3\, kV$ a.c. to transmit a power of $4.4\, kW$. If primary coil has $600$ turns, then alternating current in secondary coil is- $\frac{1}{3} A $
- $\frac{4}{3} A $
- $\frac{5}{3} A $
- $\frac{7}{3} A $
11.
In LCR series resonance circuit, choose the wrong statement
Resonance occurs at XL = XC
- At resonance, current has a maximum value
- At resonance, circuit is purely inductive
- At resonance, impedance is minimum
12.
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
\(\frac {C(V_1^2 - V_2^2)}{L}\)
\(\frac {C(V_1^2 + V_2^2)}{L}\)
\((\frac {C(V_1^2 - V_2^2)}{L})^{\frac {1}{2}}\)
\((\frac {C(V_1 - V_2)}{L})^{\frac {1}{2}}\)
13.
A series LCR circuit is subjected to an AC signal of \( 200 \, \text{V}, 50 \, \text{Hz} \). If the voltage across the inductor (\( L = 10 \, \text{mH} \)) is \( 31.4 \, \text{V} \), then the current in this circuit is:- \( 68 \, \text{A} \)
- \( 63 \, \text{A} \)
- \( 10 \, \text{A} \)
- \( 10 \, \text{mA} \)
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