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JEE Main Physics Mock Test- 9 - JEE MCQ


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25 Questions MCQ Test Mock Tests for JEE Main and Advanced 2025 - JEE Main Physics Mock Test- 9

JEE Main Physics Mock Test- 9 for JEE 2024 is part of Mock Tests for JEE Main and Advanced 2025 preparation. The JEE Main Physics Mock Test- 9 questions and answers have been prepared according to the JEE exam syllabus.The JEE Main Physics Mock Test- 9 MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for JEE Main Physics Mock Test- 9 below.
Solutions of JEE Main Physics Mock Test- 9 questions in English are available as part of our Mock Tests for JEE Main and Advanced 2025 for JEE & JEE Main Physics Mock Test- 9 solutions in Hindi for Mock Tests for JEE Main and Advanced 2025 course. Download more important topics, notes, lectures and mock test series for JEE Exam by signing up for free. Attempt JEE Main Physics Mock Test- 9 | 25 questions in 60 minutes | Mock test for JEE preparation | Free important questions MCQ to study Mock Tests for JEE Main and Advanced 2025 for JEE Exam | Download free PDF with solutions
JEE Main Physics Mock Test- 9 - Question 1
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A low-loss transformer has 230 volts applied to the primary and gives 4.6 volts in the secondary. Secondary is connected to a load which draws 5 ampere of current. The current (in ampere) in the primary is

JEE Main Physics Mock Test- 9 - Question 2
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A ball of mass 0.25 kg attached to the end of a string of length 1.96 m is moving in a horizontal circle. The string will break if the tension is more than 25 N. What is the maximum speed with which the ball can be moved

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JEE Main Physics Mock Test- 9 - Question 3
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In a transformer, the number of turns in primary coil and secondary coil are 5 and 4 respectively. If 240 V is applied on the primary coil, then the ratio of current in primary and secondary coil is

Detailed Solution for JEE Main Physics Mock Test- 9 - Question 3

 We know that 

Ns / Np =  Is / Ip , where p represents primary and s ,secondary coil

    Ip / Is = 4 : 5

JEE Main Physics Mock Test- 9 - Question 4
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The wavelength 'λ' for a particle with momentum p
JEE Main Physics Mock Test- 9 - Question 5
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Two charged conducting spheres of radii a and b are connected to each other by a wire. The ratio of electric fields at the surface of two spheres is
JEE Main Physics Mock Test- 9 - Question 6
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A straight wire of length l and electric dipole moment p is bent to form a semicircle. The new dipole moment would be
JEE Main Physics Mock Test- 9 - Question 7
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The net charge on a current carrying conductor is
JEE Main Physics Mock Test- 9 - Question 8
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Two pieces of a glass plate, placed one upon the other with a little water in between them, can not be separated easily, because of
JEE Main Physics Mock Test- 9 - Question 9
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A ball of mass 0.25 kg attached to the end of a string of length 1.96 m is moving in a horizontal circle. The string will break if the tension is more than 25 N. What is the maximum speed with which the ball can be moved
JEE Main Physics Mock Test- 9 - Question 10
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A bullet of mass m and velocity V is fired into a block of mass M and sticks to it. The final velocity would be
JEE Main Physics Mock Test- 9 - Question 11
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A logic gate is an electronic circuit which
JEE Main Physics Mock Test- 9 - Question 12
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If a person with a spring balance and a body hanging from it goes up and up in an aeroplane, then reading of weight of body as indicated by spring balance will
Detailed Solution for JEE Main Physics Mock Test- 9 - Question 12

Spring balance measures the weight of the body which depends upon the value of g. The height obtained by an aeroplane will not bring significant change in g so the spring balance is to read the same

 

JEE Main Physics Mock Test- 9 - Question 13
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In radioactive decay process, the negatively charged emitted β -particles are
JEE Main Physics Mock Test- 9 - Question 14
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In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A):A wire has a resistance of 12Ω. It is bent in the form of a circle. The effective resistance between two points on any diameter is 6Ω.
Reason(R): Equivalent resistance between two points on any diameter is in series.
JEE Main Physics Mock Test- 9 - Question 15
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In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Refractive index of a material depends on the frequency of the light
Reason(R): Incoming e.m. wave applies an electric field and polarises it, contributing to (∈) permittivity of the medium, depending on its frequency.
JEE Main Physics Mock Test- 9 - Question 16
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A spherical ball rolls on a table without slipping. Then the fraction of its total energy associated with rotation is
JEE Main Physics Mock Test- 9 - Question 17
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Blowing air with open mouth is an example of
JEE Main Physics Mock Test- 9 - Question 18
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Which of the following is a dimensionless quantity?
JEE Main Physics Mock Test- 9 - Question 19
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A stationary point source of sound emits sound uniformly in all directions in a non-absorbing medium. Two points P and Q are at a distance of 4m and 9m respectively from the source. The ratio of amplitudes of the waves at P and Q is
JEE Main Physics Mock Test- 9 - Question 20
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We have two radioactive nuclei A and B. Both convert into a stable nucleus C. Nucleus A converts into Cafter emitting two αα-particles and three β-particles. Nucleus B converts into C after emitting one αα-particle and five β-particles. At time t=0, nuclei of A are 4N0 and that of B are N0. Half life of A (into the conversion of C) is 1min and that of B is 2min. Initially number of nuclei of C are zero.

Q. What are number of nuclei of C, when number of nuclei of A and B are equal?
*Answer can only contain numeric values
JEE Main Physics Mock Test- 9 - Question 21
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'n' moles of an ideal gas undergoes a process A → B as shown in the figure. The maximum temperature of the gas during the process will be   Then the value of A is :-

*Answer can only contain numeric values
JEE Main Physics Mock Test- 9 - Question 22
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In Y.D.S.E. using light of wavelength 6000Å angular fringe width of fringe formed on the screen is 1°. Find the distance between the slits :-

Detailed Solution for JEE Main Physics Mock Test- 9 - Question 22

*Answer can only contain numeric values
JEE Main Physics Mock Test- 9 - Question 23
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An electron moves in the field produced by a charged sphere of radius 10 cm along the radius connecting the points separated by 12 and 15 cm from the centre of the sphere. The velocity of the electron changes thereby from 2 × 105 to 2 × 106 m/s. Determine the surface charge (in nC/m2) density of the sphere. (Mass of electron = 9.1 × 10–31 kg)

Detailed Solution for JEE Main Physics Mock Test- 9 - Question 23

*Answer can only contain numeric values
JEE Main Physics Mock Test- 9 - Question 24
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You are given a converging lens with equal radii of curvature and a diverging lens with the same radii of curvature as those of the converging lens. The lenses are made of material with n = 1.50, and the radii of curvature are all 35 cm. They are placed at opposite ends of a tube 15 cm long, and the nearer lens which is converging is 10 cm from an object. What is the location of the image that results from the two refractions? Write the final distance (in cm) from diverging lens.

Detailed Solution for JEE Main Physics Mock Test- 9 - Question 24

*Answer can only contain numeric values
JEE Main Physics Mock Test- 9 - Question 25
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The new white belt of a long horizontal conveyor is moving with a constant speed v = 3.0 m/s. A small block of carbon is placed on the belt with zero initial velocity relative to the ground. The block will slip a bit before moving with the belt, leaving a black mark on the belt (figure). How long is that mark (in m) if the coefficient of kinetic friction between the carbon block and the belt is 0.20 and the coefficient of static friction is 0.30?

Detailed Solution for JEE Main Physics Mock Test- 9 - Question 25

02 = v2 – 2µkgSrel

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