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# Test: Physics Mock- 9

## 45 Questions MCQ Test NEET Mock Test Series | Test: Physics Mock- 9

Description
This mock test of Test: Physics Mock- 9 for NEET helps you for every NEET entrance exam. This contains 45 Multiple Choice Questions for NEET Test: Physics Mock- 9 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Physics Mock- 9 quiz give you a good mix of easy questions and tough questions. NEET students definitely take this Test: Physics Mock- 9 exercise for a better result in the exam. You can find other Test: Physics Mock- 9 extra questions, long questions & short questions for NEET on EduRev as well by searching above.
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QUESTION: 2

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QUESTION: 3

### Atomic mass number of an element is 232 and its atomic number is 90. The end product of this radioactive element is an isotope of lead. The number of alpha and beta particles emitted is

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QUESTION: 4

A small solid cylinder rolls up along a curved surface (fig.) with an initial velocity v. It will ascend up to a height ‘h’ equal to

Solution:

Since the cylinder is rolling, it has translational and rotational kinetic energies. The total kinetic energy is

K = (½) Mv+ (½) 2

where M is the mass, I is the moment of inertia and ω is the angular velocity of the cylinder. At the highest point, the kinetic energy will be zero since the entire energy will be converted into gravitational potential energy Mgh where h is the height. So. we have

(½) Mv+ (½) 2 = Mgh

The moment of inertia of the cylinder about its own axis is I = (½) MR2 where is the radius of the cylinder. The angular velocity ω = v/R. Substituting these in the above equation,

(½) Mv+ (½)×(½) MR2 ×v2/R2 = Mgh

Or, (¾)Mv2 = Mgh, from which h = 3v2/4g

QUESTION: 5

A bullet of mass m is fired into a block of wood of mass M which hangs on the end of a pendulum and gets embedded in it. When the bullet strikes the wooden block, the pendulum starts to swing with a maximum rise R. The velocity of the bullet is given by

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QUESTION: 6

The electrical resistance of a mercury column in a cylindrical container is R. When the same mercury is poured into another cylindrical container twice the radius of cross-section, the resistance of mercury column now is

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QUESTION: 7
Copper and sillicon is cooled from 300 K to 60 K, the specific resistance
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QUESTION: 8
Which of the following statements is correct
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QUESTION: 9
A transformer is used to light a 100W and 110V lamp from a 220V mains. If the main current is 0.5A, the efficiency of the transformer is approximately
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QUESTION: 10
The phase difference between the current and voltage at resonance is
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QUESTION: 11

An electric dipole consists of two opposite charges of magnitude ± q seperated by 2a. When the dipole is placed in uniform electric field E, to have minimum potential energy, then dipole moment p makes which the following angle with E

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QUESTION: 12
Five equal capacitors connected in series have a resultant capacitance of 4 $\mu$F. The total energy stored in these, when these are connected in parallel and charged to 400V is
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QUESTION: 13
A body of mass 2 kg is kept by pressing to a vertical wall by a force of 100 N. The friction between wall and body is 0.3. The the frictional force is equal to
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QUESTION: 14

The acceleration due to gravity at a height 1/10th of the radius of the earth above the earth's surface is 8.2 m-s⁻2. Its value at a point at the same distance below the surface of the earth is

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QUESTION: 15
A geostationary satellite
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QUESTION: 16
The maximum wavelength of radiations emitted at 900 K is 4μm. What will be the maximum wavelength of radiations emitted at 1200 K
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QUESTION: 17

A galvanometer having a resistance of 50 Ω gives a full scale deflection for a current of 0.05A. The length in meter of a resistance wire of area of cross section 2.97 x 10 − 3 c m 2 that can be used to convert the galvanometer into an ammeter which can be read a maximum of 5A current is [specific resistance of the wire = 5 x 10−7 c m 2 Ω − m ]

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QUESTION: 18
The pressure and temperature of two different gases is P and T having the volume V for each. They are mixed keeping the same volume and temperature, the pressure of the mixture will be
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QUESTION: 19
A galvanometer having a resistance of 8 Ω is shunted by a wire of resistance 2 Ω. If the total current is 1 A, then current passing through the shunt will be
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QUESTION: 20
A bar magnet of magnetic moment M is kept in a uniform magnetic field of strength B, making angle θ with its direction. The torque acting on it is
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QUESTION: 21

The moment of inertia of a uniform thin rod of length L and mass M about an axis passing through a point at a distance of L/3 from one of its ends and perpendicular to the rod is

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QUESTION: 22
In old age, arteries carrying blood in the human body become norrow, resulting in an increase in the blood pressure. This follows from
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QUESTION: 23

The acceleration of a particle is increasing linearly with time t as bt. The particle starts from the origin with an initial velocity ν₀. the distance travelled by the particle in time t will be

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QUESTION: 24
Which of the following affets the elasticity of a substance?
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QUESTION: 25

A body is projected at such an angle that the horizontal range is three times the greatest height. The angle of projection is

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QUESTION: 26

A stone of mass 1 kg tied of the end of a 1 m long string, is whirled in a horizontal circle, with a uniform angular velocity of 2 rad-s⁻1. Tension of the string is

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QUESTION: 27
A parachutist of weight 'w' strikes the ground with his legs fixed and comes to rest with an upward acceleration of magnitude 3 g. Force exerted on him by ground during landing is
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QUESTION: 28
Two white dots are 1 mm apart on a black paper. They are viewed by eye of pupil diameter 3 mm. Approximately, what is the maximum distance at which these dots can be resolved by the eye? (Take wavelength of light =500 nm)
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QUESTION: 29

Two simple harmonic motions with the same frequency act on a particle at right angles i.e., along x and y-axis. If the two amplitudes are equal and the phase difference is π/2, the resultant motion will be

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QUESTION: 30

Range of a projectile is R, when the angle of projection is 30o. Then, the value of the other angle of projection for the same range is

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QUESTION: 31
A plano convex lens is made of refractive index 1.6. The radius of curvature of the curved surface is 60 cm. The focal length of the lens is
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QUESTION: 32
If I, α and τ are the moment of inertia, angular acceleration and torque respectively of a body rotating about any axis with angular velocity ω, then
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QUESTION: 33

The dimensional formula for angular velocity in

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QUESTION: 34

Two forces each of magnitude F, acting o a particle yield a resultant force of magnitude F. The angle between the forces is

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QUESTION: 35

Mercury does not wet glass, wood or iron because

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QUESTION: 36
Two wire with resistances R and 2R are connected in parallel, the ratio of heat generated in 2R and R is
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QUESTION: 37
If R₁ and R₂ are respectively the filament resistances of a 200 watt bulb and 100 watt bulb designed to operate on the same voltage, then
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QUESTION: 38

540 g of ice at 0oC is mixed with 540 g of water at 80oC. The final temp. of the mixture in oC will be

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QUESTION: 39
If the heat of 110 J is added to a gaseous system, change in internal energy is 40 J. Then the amount of external work done is
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QUESTION: 40

The velocity v (in cm/sec) of a particle is given in terms of time t (in sec) by the relation v=at + b/t+c; the dimensions of a, b and c are

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QUESTION: 41
Length can not be measured by
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QUESTION: 42

In Young's double slit experiment, the width of the fringes obtained with light of wavelength 6000 Angstrom is 2.0mm. The fringe width, if the entire apparatus is immersed in a liquid of refractive index 1.33, will be

Solution:

Fringe width in Young's double slit experiment β = Dλ /d
When apparatus is immersed in liquid, only wavelength of light (λ) changes
Wavelength of light is liquid,
λ' = λ /n , where n = refractive index of medium
Initial fringe width, β = Dλ /d .....(i)
Fringe width in liquid, β' = Dλ' /d .....(ii)
Dividing Equation (ii) by Equation (i), we get

QUESTION: 43
If the tension and diameter of a sonometer wire of fundamental frequency n are doubled and density is halved, then its fundamental frequency will become
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QUESTION: 44

The potential energy of a weight less spring compressed by a distance a is propotional to

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QUESTION: 45

A shell of mass 200 gm is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy . The initial velocity of the shell is :

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