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# Test: Physics- 9

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

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This mock test of Test: Physics- 9 for NEET helps you for every NEET entrance exam. This contains 45 Multiple Choice Questions for NEET Test: Physics- 9 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Physics- 9 quiz give you a good mix of easy questions and tough questions. NEET students definitely take this Test: Physics- 9 exercise for a better result in the exam. You can find other Test: Physics- 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

### In Young's double slit experiment, the fringe width is found to be 0.4 mm. If the whole apparatus is immersed in water of refractive index 4/3 without disturbing the geometrical arrangement, the new fringe width will be

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QUESTION: 4
When an object is at distances and from a lens a real image and a virtual image is formed respectively having the same magnification. The focal length of the lens is
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QUESTION: 5
A star is going away from the earth. An observer on the earth will see the wavelength of light coming from the star
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QUESTION: 6
Two optical media of refractive indices and contain x and y waves of the same colour in the same thickness.Then their relative refractive  is equal to
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QUESTION: 7
The focal length of a convex lens is 10 cm and its is 1.5. If the radius of curvature of one surface is 7.5 cm,the radius of curvature of the second surface will be
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QUESTION: 8
If an object is placed unsymmetrically between two plane mirrors inclined at an angle of then the total no. of images formed is
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QUESTION: 9
If & are the electric permittivity and magnetic permeability in a free space. & are the corresponding quantities in medium, the index of refraction of the medium is
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QUESTION: 10
The refractive index of violet and red light are 1.54 and1.52 respectively. If the angle of prism is the angular dispersion is
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QUESTION: 11
Interference fringes are obtained using two coherent sources whose intensities are in ratio 4 : 1. Then the ratio of the intensities of the bright and dark bands is
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QUESTION: 12
A ray of light passes through an equilateral prism such that the angle of incidence is equal to the angle of emergence and the latter equal to (3/4)th the angle of the prism. The angle of deviation will be
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QUESTION: 13
A point object O is placed on the principal axis of a convex lens of focal length 20 cm at a distance of 40cm to the left of it. The diameter of the lens is 10 cm. If the eye is placed 60 cm to the right of the lens at a distance h below the principal axis, then the maximum value of h to see the image will be
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QUESTION: 14
In a compound microscope, the focal lengths of two lenses are 1.5 cm and 6.25 cm. If an object is placed at 2cm from objective and the final image is formed at 25cm from eye lens, the distance between the two lenses is
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QUESTION: 15
Angle of a prism is A and its one surface is slivered.Light rays falling at an angle of incidence 2 A on first surface returns back, through, the same path after suffering reflection at the second silvered surface.Refractive index of material is
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QUESTION: 16
Diamond shines due to its
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QUESTION: 17
The resolving power of a telescope is highest for---- light
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QUESTION: 18
The wavelength of the line for an elements of atomic number 43 is l. Then the wavelength of the line for an element of atomic number 29 is
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QUESTION: 19
When a beam of accelerated electrons hit a target a continuous X-ray spectrum is emitted from the target.Which one of these wavelengths is absent in the X-ray spectrum if the X-rays tube is operated at 40,000V ?
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QUESTION: 20
The radio transmitter operates on a wavelength of 1500m at a power of 400 kilowatt. The energy of radiophoton in Joules is
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QUESTION: 21
A proton and an a-particle are accelerated through the same potential differences. The ratio of their de Broglie wavelengths is
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QUESTION: 22
Light of two different frequencies whose photons have energies 1 and 2.5 eV respectively, successively illuminate a metal whose work function is 0.5 eV. The ratio of the maximum speeds of the emitted electrons will be
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QUESTION: 23
In a photoelectric experiment, photons of energy 4.8eV are incident on a metal surface. They liberate
electrons which are just 'stopped' by an electrode at a potential of -3.3 volt with respect to the metal. The work function of the metal surface in electron volt is
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QUESTION: 24
A freshly prepared radioactive source of half life 2 hrs emits radiations of intensity which is 64 times the permissible safe level. The minimum time after which it would be possible to work safely with this source is
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QUESTION: 25
A gamma ray photon creates an electron positron pair. If the rest mass energy of an electron is 0.5
MeV and the total kinetic energy of the electron positron pair is 0.5 MeV, then the energy of the
gamma ray photon must be
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QUESTION: 26
Photoelectric effect can be explained only by assuming that light
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QUESTION: 27
One of the following unstable in free space is
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QUESTION: 28
In the thermonuclear reaction the energy released per nucleon of the reactants is
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QUESTION: 29
The relationship between and is given by
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QUESTION: 30
Three amplifires, each having voltage amplification of 10, are connected in series. The resultant amplification would be
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QUESTION: 31
A transistor is operated in CE configuration at such that a change in base current in from to produces a change in the collector current from 9 mA to 16.5 mA. The value of current gain, is
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QUESTION: 32
The following logic symbol is equivalent to Solution:
QUESTION: 33
A n-type semi-conductor is electrically
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QUESTION: 34

In a full wave rectifier circuit operating from 50 Hz mains frequency, the fundamental frequency in the ripple would be

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Frequency = 2(frequency of input signal)

QUESTION: 35
Which of the following gates cannot be prepared by the repetitive use of NOR gate
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QUESTION: 36
Donor type semiconductor is formed by adding impurity of valency
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QUESTION: 37
The zener diode is used for
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QUESTION: 38
If we want a reverse-biased P-N junction, we give
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QUESTION: 39
Which truth table is correct for the function A and B respresented by the figure given below Solution:
QUESTION: 40
A pure semiconductor has
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QUESTION: 41
For a transistor amplifier power gain and voltage gain are 7.5 and 2.5 respectively. The correct value of the current gain will be
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QUESTION: 42
How many AM broadcast stations can be accommodated in a 150 KHz bandwidth if the highest frequency of modulation is 5 KHz ?
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QUESTION: 43
Which of the following is utilized in television communication?
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QUESTION: 44
Devices which convert an information into electrical signal is known as
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QUESTION: 45
The area of the region covered by the T.V. broadcast by a T.V. tower to height 100 m is
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