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 has 300 turns and an area of 60 cm². The magnetic field perpendicular to the plane of the coil is 0.5 Wb/m² and takes 0.1 s to rotate through 180°. The value of induced e.m.f will be
(A) 25 V
(B) 18 V
(C) 9V
(D) 15 V
Option b – 18 V
Which of the following statement is true?
(A) Chock is used as resistance in dc circuit
(B) Chock is used as a resistance ac circuit
(C) Coil is used as resistance in de circuit
(D) Coil is used as resistance in ac circuit
Option b – Chock is used as a resistance ac circuit
In Young’s experiment, the fringe width increases if
(A) the monochromatic source of yellow light is replaced by red light.
(B) monochromatic source of yellow light is replaced by blue light.
(C) monochromatic source of yellow light is replaced by green light.
(D) monochromatic source of green light is replaced by violet light.
In a series resonant circuit, the a.c. the voltage across resistance R, inductance L, and capacitance C are 6 V, 8 V, and 8 V respectively. The a.c. the voltage applied to the circuit will be
(A) 20 V
(B) 10 V
(C) 6 V
(D) 25 V
Option c – 6 V
When a thin sheet of transparent material of thickness 0.002 mm is placed in the path of one of the interfering beams in Young’s double slit experiment, it is found that the central bright fringe shifts through a distance equal to four fringes. The wavelength of light used is 6220 Å. The refractive index of transparent material is
(A) 1.88
(B) 1.2946
(C) 2.24
(D) 1.9853
Option c – 2.24
A copper plate flat pendulum and a copper plate pendulum with slots in it but of the same dimension are made to oscillate in a magnetic field. Then
(A) both will show damping at the same rate.
(B) flat pendulum shall show more damping.
(C) plate with slots shall show more damping.
(D) there will be no damping.
Option b – flat pendulum shall show more damping.
A monochromatic beam of light of width 8.0 cm travels from air into a medium of refractive index 2.3, the width of the beam in the medium is
(A) 18.4 cm
(B) 6.25 cm
(C) 10.0 cm
(D) 12.6 cm
Option a – 18.4 cm
If an alternating voltage is represented as E = 141 sin(628 t), then the r.m.s. value of the voltage and the frequency are respectively
(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
The number of turns in the primary and secondary coils of a transformer is 80 and 10 respectively. If an alternating potential of 200 volts is applied to the primary, the induced potential in the secondary will be
(A) 10 V
(B) 40 V
(C) 1000 V
(D) 25 V
Option d – 25 V
Two coherent sources emit light beams of intensities 81 and 151 respectively. If the intensity of the second source is made the same as the first, the ratio of fringe visibilities will be
(A) 1 : 1.8
(B) 1 : 0.95
(C) 1.8 : 1
(D) 0.95 : 1
Option d – 0.95 : 1
The mutual inductance between two coils is 2.25 henry. If the current in the primary changes at the rate of 60 ampere/second, then the magnitude of induced e.m.f in the secondary is
(A) 135 V
(B) 64.0 V
(C) 0.016 V
(D) 100.0 V
Option a – 135 V
Faraday’s laws are consequences of the conservation of
(A) energy.
(B) energy and magnetic field.
(C) charge.
(D) magnetic field.
Option a – energy.
The turn ratio of a transformer is given as 1 : 2. If the current through the primary coil is 4 A, then calculate the current through load resistance.
(A) 1 A
(B) 8 A
(C) 2 A
(D) 1.5 A
Option b – 8 A
By Huygen’s wave theory of light, we cannot explain the phenomenon of
(A) interference.
(B) diffraction.
(C) photoelectric effect.
(D) refraction.
Option c – photoelectric effect.
Calculate the induced e.m.f in a conductor when the magnetic flux associated with it increases from 0 to 0.6 weber in 0.5 s
(A) 1.5 V
(B) 2.4 V
(C) 1.2 V
(D) 3.6 V
Option c – 1.2 V
The natural frequency of an LC circuit is 125 kHz. When the capacitor is totally filled with a dielectric material, the natural frequency decreases by 25 kHz. The dielectric constant of the material is nearly
(A) 3.33
(B) 2.12
(C) 1.56
(D) 1.91
Option c – 1.56
The self-inductance of a coil is L. Keeping the length and area the same the number of turns in the coil is increased to six times. The self-inductance of the coil will now be
(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 a.c. a circuit containing pure inductance, the current flowing is I = 7 sin (50t – π/2) A and the potential difference is V = 100 sin (50t) V. The power consumption is equal to
(A) 100 W
(B) 40 W
(C) 20 W
(D) 0 W
Option d – 0 W
If a star is moving towards the earth, then the spectral lines are shifted towards ……… end.
(A) red
(B) yellow
(C) violet
(D) green
Option c – violet
Lenz’s law gives
(A) the magnitude of the induced e.m.f.
(B) the direction of the induced current.
(C) both the magnitude and direction of the induced current.
(D) the magnitude of the induced current.
Option b – the direction of the induced current.
……… output is obtained when splitting commutator is used in a dynamo.
(A) AC
(B) DC
(C) Fluctuating dc
(D) Half wave rectified
Option c – Fluctuating dc
In Young’s experiment, the fringe width is found to be 0.5 mm. If the whole apparatus is immersed in water with a refractive index 4/3 without disturbing the geometrical arrangement, the new fringe width will be
(A) 0.375 mm
(B) 0.40 mm
(C) 0.53 mm
(D) 450 microns
Option a – 0.375 mm
Which of the following statement is true?
(A) Along with mutual inductance, self-inductance also takes place in one of the coils.
(B) Along with mutual inductance, self-inductance does not take place.
(C) Along with mutual inductance, self-inductance takes place in both coils.
(D) Along with mutual inductance, self-inductance is observed.
Option a – Along with mutual inductance, self-inductance also takes place in one of the coils.
A point is situated at 1.8 cm and 1.9 cm from two coherent sources. The nature of illumination if the wavelength of light is 5000 Å is
(A) a bright point.
(B) a dark point.
(C) a central bright point.
(D) bright dark depending upon the nature of the source of light.
Option a – a bright point.
The interference pattern in which the positions of maximum and minimum intensity of light remain fixed is
(A) constructive interference.
(B) destructive interference.
(C) wavy interference (i.e., colors are changing).
(D) sustained interference.
Option d – sustained interference
The rate of change of flux is ( Nuclei Previous Year Questions NEET )
(A) directly proportional to its magnetic induction.
(B) inversely proportional to its magnetic inducting.
(C) directly proportional to the square of its magnetic induction.
(D) Inversely proportional to the square of its magnetic induction.
Option a – directly proportional to its magnetic induction.
In an ideal transformer, the primary and the secondary voltages always have
(A) equal magnitude.
(B) the same phase.
(C) a phase difference of 90°.
(D) a phase difference of 180°.
Option d – a phase difference of 180°.
In Young’s double slit experiment, the ratio of intensities of bright and dark fringes is 9. This means that
(A) The intensities of individual sources are 5 and 4 units respectively.
(B) The intensities of individual sources are 4 and 1 unit respectively.
(C) The ratio of their amplitudes is 3 : 1.
(D) The ratio of their amplitudes is 9 : 2.
Option b – The intensities of individual sources are 4 and 1 unit respectively.
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