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Nuclei Previous Year Questions NEET. We covered all the Nuclei Previous Year Questions NEET in this post for free so that you can practice well for the exam.
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A coil with 300 turns and an area of 60 cm² is placed in a magnetic field of 0.5 Wb/m², perpendicular to its plane. If it rotates through 180° in 0.1 seconds, what will be the induced e.m.f.?
(A) 25 V
(B) 18 V
(C) 9 V
(D) 15 V
Option b – 18 V
Which of the following statements is correct regarding the use of a choke?
(A) Choke acts as a resistor in a DC circuit
(B) Choke acts as a resistor in an AC circuit
(C) Coil acts as resistance in a DC circuit
(D) Coil acts as resistance in an AC circuit
Option b – Choke acts as a resistor in an AC circuit
In Young’s double-slit experiment, fringe spacing increases when
(A) yellow Light is replaced with red Light
(B) yellow Light is replaced with blue Light
(C) yellow Light is replaced with green Light
(D) green Light is replaced with violet Light
In a series resonant AC circuit, the voltages across R, L, and C are 6 V, 8 V, and 8 V respectively. What is the applied AC voltage?
(A) 20 V
(B) 10 V
(C) 6 V
(D) 25 V
Option c – 6 V
In Young’s experiment, a transparent sheet of thickness 0.002 mm is placed in the path of one of the interfering beams, shifting the central bright fringe by four fringe widths. If the wavelength used is 6220 Å, what is the refractive index of the material?
(A) 1.88
(B) 1.2946
(C) 2.24
(D) 1.9853
Option c – 2.24
A flat copper plate and a slotted copper plate of equal dimensions are suspended in a magnetic field. How will they behave?
(A) Both experience equal damping
(B) The flat plate shows greater damping
(C) The slotted plate shows greater damping
(D) Neither will experience damping
Option b – The flat plate shows greater damping
A monochromatic light beam of 8.0 cm width enters a medium with a refractive index of 2.3. What will be the width of the beam inside the medium?
(A) 18.4 cm
(B) 6.25 cm
(C) 10.0 cm
(D) 12.6 cm
Option a – 18.4 cm
If the alternating voltage is given by E = 141 sin(628t), determine its RMS value and frequency.
(A) 141 V, 628 Hz
(B) 100 V, 50 Hz
(C) 100 V, 100 Hz
(D) 141 V, 100 Hz
Option c – 100 V, 100 Hz
A transformer has 80 turns in the primary and 10 in the secondary. If 200 V is applied to the primary, what will be the output voltage in the secondary?
(A) 10 V
(B) 40 V
(C) 1000 V
(D) 25 V
Option d – 25 V
Two coherent light sources have intensities of 81 and 151. If the second is adjusted to match the first, what will be the new ratio of fringe visibility?
(A) 1 : 1.8
(B) 1 : 0.95
(C) 1.8 : 1
(D) 0.95 : 1
Option d – 0.95 : 1
Two coils have a mutual inductance of 2.25 H. If the current in the primary changes at 60 A/s, what is the induced emf in the secondary?
(A) 135 V
(B) 64.0 V
(C) 0.016 V
(D) 100.0 V
Option a – 135 V
Faraday’s law is based on the conservation of which physical quantity?
(A) energy
(B) energy and magnetic field
(C) Charge
(D) Magnetic field
Option a – energy
A transformer with a turn ratio of 1:2 has 4 A current in the primary. What is the current through the load?
(A) 1 A
(B) 8 A
(C) 2 A
(D) 1.5 A
Option b – 8 A
According to Huygens’ wave theory, which of the following phenomena cannot be explained?
(A) Interference
(B) Diffraction
(C) Photoelectric effect
(D) Refraction
Option c – Photoelectric effect
Magnetic flux through a conductor increases from 0 to 0.6 weber in 0.5 seconds. What is the induced emf?
(A) 1.5 V
(B) 2.4 V
(C) 1.2 V
(D) 3.6 V
Option c – 1.2 V
An LC circuit has a natural frequency of 125 kHz. When the Capacitor is filled with a dielectric, the frequency drops to 100 kHz. What is the dielectric constant?
(A) 3.33
(B) 2.12
(C) 1.56
(D) 1.91
Option c – 1.56
A coil with self-inductance L has its number of turns increased sixfold. What will be the new self-inductance?
(A) 2 times the original
(B) 16 times the original
(C) 12 times the original
(D) 36 times the original
Option d – 36 times the original
In an AC circuit with a pure inductor, the current is I = 7 sin(50t – π/2) A and voltage is V = 100 sin(50t) V. What is the power consumed?
(A) 100 W
(B) 40 W
(C) 20 W
(D) 0 W
Option d – 0 W
When a star approaches Earth, in which direction do its spectral lines shift?
(A) Red
(B) Yellow
(C) Violet
(D) Green
Option c – Violet
What does Lenz’s law determine?
(A) Magnitude of the induced emf
(B) Direction of the induced current
(C) Both magnitude and direction
(D) Magnitude of the current
Option b – Direction of the induced current
What type of current is produced by a dynamo using a split-ring commutator?
(A) AC
(B) DC
(C) Fluctuating DC
(D) Half-wave rectified
Option c – Fluctuating DC
In Young’s experiment, if fringe width is 0.5 mm in air, what will it be when the setup is placed in water (μ = 4/3)?
(A) 0.375 mm
(B) 0.40 mm
(C) 0.53 mm
(D) 450 microns
Option a – 0.375 mm
Which of the following statements is accurate regarding inductance?
(A) Self-inductance occurs in one coil during mutual inductance
(B) Self-inductance does not occur with mutual inductance
(C) Both coils show self-inductance in mutual induction
(D) Self-inductance is always present with mutual inductance
Option a – Self-inductance occurs in one coil during mutual inductance
A point is located 1.8 cm and 1.9 cm from two coherent sources. If the light’s wavelength is 5000 Å, what type of interference occurs?
(A) Bright fringe
(B) Dark fringe
(C) Central bright fringe
(D) Bright or dark depending on source nature
Option a – Bright fringe
The interference pattern where the maxima and minima positions remain fixed is called
(A) Constructive interference
(B) Destructive interference
(C) Wavy interference (changing colors)
(D) Sustained interference
Option d – Sustained interference
The rate of change of magnetic flux is
(A) Directly proportional to magnetic induction
(B) Inversely proportional to magnetic induction
(C) Proportional to the square of magnetic induction
(D) Inversely proportional to the square of magnetic induction
Option a – Directly proportional to magnetic induction
In an ideal transformer, what is the phase relationship between primary and secondary voltages?
(A) Equal in magnitude
(B) In the same phase
(C) Phase difference of 90°
(D) Phase difference of 180°
Option d – Phase difference of 180°
In Young’s experiment, the ratio of bright to dark fringe intensity is 9. What does this indicate about the individual source intensities?
(A) 5 and 4 units respectively
(B) 4 and 1 unit respectively
(C) Amplitude ratio is 3:1
(D) Amplitude ratio is 9:2
Option b – 4 and 1 unit respectively
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