Here we will provide you the 50+ MCQ Questions of Alternating Current for NEET-UG. Electric Charges and Fields is the chapter 7 in Class XII or Class 12 Physics NCERT Unit Alternating Current NEET (conducted by NTA) is based on the NCERT book.
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These 50+ MCQ questions are selected by the experts of studyrate.in and these are more difficult questions, which will help you to better understand Alternating Current NEET MCQ Questions with Answers.
Alternating Current NEET MCQ
A capacitor and a resistor are connected in series across an alternating voltage source. Which of the following statements is true?
a) The current in the circuit is in phase with the voltage.
b) The voltage across the capacitor leads the current by 90 degrees.
c) The voltage across the resistor lags the current by 90 degrees.
d) The power factor of the circuit is unity.
A coil has a resistance of 10 ohms and an inductance of 0.1 henry. It is connected to a 100 V, 50 Hz AC supply. What is the impedance of the coil?
a) 10 ohms
b) 100 ohms
c) 141.4 ohms
d) 200 ohms
An AC voltage of 220 V has a frequency of 50 Hz. What is the peak value of the voltage?
a) 220 V
b) 311 V
c) 440 V
d) 623 V
A capacitor of 2 microfarads and an inductor of 10 millihenries are connected in series across a 50 Hz AC source. What is the resonant frequency of the circuit?
a) 50 Hz
b) 100 Hz
c) 200 Hz
d) 500 Hz
A transformer has 200 turns on its primary coil and 50 turns on its secondary coil. If the primary coil is connected to a 220 V AC source, what is the voltage across the secondary coil?
a) 220 V
b) 55 V
c) 880 V
d) 440 V
An AC voltage of 100 V has a phase difference of 30 degrees with respect to the current in a circuit. What is the power factor of the circuit?
a) 0.5
b) 0.87
c) 0.94
d) 1.0
A 220 V, 50 Hz AC source is connected to a circuit that contains a 10 ohm resistor, a 2 microfarad capacitor, and a 5 millihenry inductor in series. What is the impedance of the circuit?
a) 10 ohms
b) 100 ohms
c) 97.5 ohms
d) 102.5 ohms
An AC voltage of 240 V has a frequency of 60 Hz. What is the RMS value of the voltage?
a) 240 V
b) 169.7 V
c) 339.4 V
d) 408.2 V
A transformer has 200 turns on its primary coil and 1000 turns on its secondary coil. If the primary coil is connected to a 220 V AC source, what is the voltage across the secondary coil?
a) 11 V
b) 44 V
c) 1100 V
d) 4400 V
An AC voltage of 120 V has a phase difference of 45 degrees with respect to the current in a circuit. What is the power factor of the circuit?
a) 0.5
b) 0.71
c) 0.87
d) 1.0
A coil of 100 turns is wound on a toroidal core of relative permeability 800. The core has a cross-sectional area of 4 cm² and a mean circumference of 80 cm. What is the inductance of the coil?
A) 2.5 mH
B) 3.2 mH
C) 4.0 mH
D) 5.6 mH
A 50 Ω resistor and a 10 mH inductor are connected in series to an AC source of voltage V = Vm sin ωt. What should be the value of Vm such that the average power dissipated in the circuit is equal to the maximum power dissipated?
A) 100 V
B) 141.4 V
C) 200 V
D) 282.8 V
A series RLC circuit has a resistance of 5 Ω, an inductance of 0.1 H, and a capacitance of 0.01 μF. At what frequency does the circuit have the maximum impedance?
A) 100 Hz
B) 1 kHz
C) 10 kHz
D) 100 kHz
A transformer has a primary coil with 500 turns and a secondary coil with 1,000 turns. If the primary coil is connected to a 220 V, 50 Hz AC source, what is the voltage across the secondary coil?
A) 110 V
B) 220 V
C) 440 V
D) 880 V
A 2 μF capacitor and a 5 mH inductor are connected in series to an AC source of voltage V = Vm sin ωt. What should be the value of Vm such that the average power dissipated in the circuit is equal to the maximum power dissipated?
A) 20 V
B) 40 V
C) 80 V
D) 160 V
An AC source of frequency 50 Hz is connected to a series RLC circuit with a resistance of 10 Ω, an inductance of 1 H, and a capacitance of 1 μF. What is the phase angle between the voltage across the resistor and the voltage across the capacitor at resonance?
A) 0°
B) 45°
C) 90°
D) 180°
A transformer has a primary coil with 1,000 turns and a secondary coil with 500 turns. If the primary coil is connected to a 110 V, 60 Hz AC source, what is the frequency of the voltage across the secondary coil?
A) 30 Hz
B) 60 Hz
C) 120 Hz
D) 240 Hz
A series RLC circuit has a resistance of 20 Ω, an inductance of 0.1 H, and a capacitance of 1 μF. What is the Q-factor of the circuit at resonance?
A) 0.5
B) 1
C) 2
D) 4
In a series LCR circuit, the voltage across the capacitor and inductor at resonance frequency is equal to:
A) The voltage across the resistance
B) Twice the voltage across the resistance
C) Half the voltage across the resistance
D) Zero
The power consumed in an AC circuit is given by:
A) VI cos θ
B) VI sin θ
C) VI tan θ
D) VI sec θ
Which of the following is not a passive component?
A) Capacitor
B) Inductor
C) Resistor
D) Transistor
The reactance of an inductor is given by:
A) XL = R^2 + (ωL)^2
B) XL = R/ωL
C) XL = ωL/R
D) XL = ωL
When a capacitor is connected to an AC voltage source, the current in the circuit:
A) Leads the voltage by π/2 radians
B) Lags the voltage by π/2 radians
C) Is in phase with the voltage
D) Is zero
The unit of reactance is:
A) Ohm
B) Henry
C) Farad
D) Radian
The phase difference between the voltage across the inductor and capacitor in a series LCR circuit at resonance is:
A) π radians
B) 2Ï€ radians
C) 0 radians
D) π/2 radians
The peak factor of an AC waveform is:
A) 1.11
B) 1.41
C) 1.57
D) 1.73
An inductor is connected in series with a 50 Ω resistor and a 10 μF capacitor. What should be the frequency of the AC voltage source for the circuit to be resonant?
A) 159 Hz
B) 318 Hz
C) 500 Hz
D) 1000 Hz
The average power in an AC circuit is:
A) VI
B) VI cos θ
C) VI sin θ
D) VI tan θ
We hope there NEET MCQ of Class 12 Alternating Current will help you to score an excellent rank in NEET-UG. If you have any queries feel free to write in the comments section. We at Study Rate are always ready to serve our students.
