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NEET Mock Test - 27 - NEET MCQ


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30 Questions MCQ Test Additional Study Material for NEET - NEET Mock Test - 27

NEET Mock Test - 27 for NEET 2024 is part of Additional Study Material for NEET preparation. The NEET Mock Test - 27 questions and answers have been prepared according to the NEET exam syllabus.The NEET Mock Test - 27 MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for NEET Mock Test - 27 below.
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NEET Mock Test - 27 - Question 1

An A.C. supply gives 30 V r.m.s. which passes through a 10Ω resistance. The power dissipated in it is

NEET Mock Test - 27 - Question 2

In the photo electric phenomenon, the number of photo electrons emitted is proportional to

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NEET Mock Test - 27 - Question 3

A proton and an α - particle enter into a region of uniform electric field. The ratio of the force on proton to that on α - particle is

NEET Mock Test - 27 - Question 4

An electron and a proton have same de-Broglie's wavelength. The kinetic energy of an electron is

NEET Mock Test - 27 - Question 5

The angular speed of an engine wheel making 90 revolutions per minute is

Detailed Solution for NEET Mock Test - 27 - Question 5

Number of revolution n=90 per minute . one revolution=2 π ; ∴ angular displacement=90 × 2π ; Angular velocity=angular displacement / time ; Angular velocity=90 × 2π / 60 Angular velocity=3 × π rad/ sec

NEET Mock Test - 27 - Question 6

Three resistances of one ohm each are connected in parallel. Such connection is again connected with 2/3Ω resistor in series. The resultant resistance will be

NEET Mock Test - 27 - Question 7

A cell of internal resistance 1.5Ω and of e.m.f. 1.5 volt balances 500 cm on a potentiometer wire. If a wire of 1.5 Ω is connected between the balance point and the cell, then the balance point will shift

NEET Mock Test - 27 - Question 8

Light of wavelength 5000 Å is incident on a metal, whose work-function is 2 eV. The maximum kinetic energy of the photoelectrons would be

Detailed Solution for NEET Mock Test - 27 - Question 8

From photoelectric equation = hc/λ = w0 + 1/2 mv2
1/2 mv2 = hc/λ - w0

NEET Mock Test - 27 - Question 9

The maximum wavelength of a beam of light can be used to produce photo electric effect on a metal is 250 nm. The energy of the electrons in Joule emitted from the surface of the metal when a beam of light of wavelength 200 nm is used [h = 6.6 x 10 − 34 J − sec ; c = 3 x 10 8 ms − 1 ]

Detailed Solution for NEET Mock Test - 27 - Question 9

When λ is expressed in A° then, W = 12400/λ

W = 1240/250 = 4.96eV
h υ = 1240/200 = 6.20eV
K = 6.20 - 4.96 = 1.24eV
= 1.24 x 1.6 x 10-19
= 19.84 x 1.6 x 10-20 J ≅ 19.86 x 10 − 20

NEET Mock Test - 27 - Question 10

If particles are moving with same velocity, then maximum de-Broglie wavelength will be for

NEET Mock Test - 27 - Question 11

The energy of a photon of wavelength λ is given

NEET Mock Test - 27 - Question 12

A coil of n turns and resistance R is connected with a galvanometer of resistance 4 R.. This combination is moved in time t seconds from a magentic flux φ₁ to φ₂. The induced current in the circuit is

NEET Mock Test - 27 - Question 13

Which one of the following electromagnetic radiations have the smallest wavelength?

NEET Mock Test - 27 - Question 14

Infra-red radiations are detected by

NEET Mock Test - 27 - Question 15

Sixty four identical drops each charged by q coulomb to potential V volt coalesce to form a single large drop. The charge and potential on the large drop are respectively

NEET Mock Test - 27 - Question 16

An electric dipole has the magnitude of its charge as q, and its dipole moment is p. It is placed in a uniform electric field E. If its dipole moment is along the direction of the field, then force acting on it and its potential energy are respectively

Detailed Solution for NEET Mock Test - 27 - Question 16

The situation is shown in adjacent figure,
∴ U = - pE cos 0 = - pE = Minimum
and the net force on the dipole is zero

NEET Mock Test - 27 - Question 17

A mass M is split into two parts, m and M-m, which are then separated by a certain distance. What ratio of m/M maximizes the gravitational force between the two parts

NEET Mock Test - 27 - Question 18

If a piston is pushed rapidly into a container of gas, what will happen to the kinetic energy of the molecules of gas and to the temperature of the gas

NEET Mock Test - 27 - Question 19

In a closed room, heat transfer takes place by

NEET Mock Test - 27 - Question 20

A mass m falls freely from rest. The linear momentum, after it has fallen through height h, is

Detailed Solution for NEET Mock Test - 27 - Question 20

u = 0; since it falls freely from rest
v2 - u2 = 2gh;
v2 = 2gh
v =
The linear momentum is given by
p = mv = m

NEET Mock Test - 27 - Question 21

A magnet freely suspended in a vibration magnetometer makes 40 oscillations per minute at a place 'A' and 20 oscillations per minute at a place 'B'. If the horizontal component of earth's magnetic field at 'A' is 36 x 10 − 6 T, then its value at 'B' is

NEET Mock Test - 27 - Question 22

A cyclotron oscillator frequency is 10 MHz. If radius of its dees 60 cm, then magnetic field for accelerating the protons is (Given e = 1.6 x 10-19C, mp = 1.67 x 10-27 kg)

Detailed Solution for NEET Mock Test - 27 - Question 22

v = 10 MHz = 10 x106 Hz = 107 Hz
R = rm = 60 cm = 0.6 m
e = 1.6 x 10-19 C
m = 1.67 x 10-27 kg

NEET Mock Test - 27 - Question 23

Air is streaming over both the aeroplane wings such that its speed is 85 m-s⁻1 over the upper surface and 75 m-s⁻1 at the lower surface. If the wings are 10 m long and have an average width of 2 m, then lift of the wind on aeroplane is (Take density of air = 1.5 kg-m⁻1)

NEET Mock Test - 27 - Question 24

The magnetic field strength at a point at a distance 'd' from the centre, on the axial line of a very short bar magnet of magnetic moment 'M' is B. The magnetic induction at a distance'2d' from centre on the equatorial line of a magnet of moment 8M, will be

NEET Mock Test - 27 - Question 25

A wire of length L and cross-section A is made of material of Young's modulus Y. If it is stretched by an amount x, then work done is

NEET Mock Test - 27 - Question 26

When the nucleus of a radioactive element emits an alpha particle, the atomic number is decreases by

NEET Mock Test - 27 - Question 27

During the β -decay,

NEET Mock Test - 27 - Question 28

In a Rutherford scattering experiment when a projectile of charge z1 and mass M1 approaches a target nucleus of charge z2 and mass M2, the distance of closest approach is r0. The energy of the projectile is:

NEET Mock Test - 27 - Question 29

A convex lens has a focal length f. It is cut into two parts along a line perpendicular to principal axis. The focal length of each part will be

NEET Mock Test - 27 - Question 30

If the moment of inertia of a wheel, having radius of gyration 60 cm, is 360 kg-m2, then mass of the wheel is

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