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NEET Physics Solved Question Paper 2016

Multiple Choice Questions

41.

Assertion: Magnetic field lines are continuous and closed.

Reason: Magnetic monopole does not exist

If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false

42.

Assertion: At resonance, LCR series circuit have a minimum current.

Reason: At resonance, in LCR series circuit, the current and e.m.f are not in phase with each other.

If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.

43.
In a Fraunhofer diffraction at single slit of width d with incident light of wavelength 5500 A^o, the first minimum is observed, at angle 30°. The first secondary maximum is observed at an angle θ =

sin^-1 $\frac{1}{\sqrt{2}}$

sin^-1 $\frac{1}{4}$

sin^-1 $\frac{3}{4}$

sin^-1 $\frac{\sqrt{3}}{2}$

sin^-1 $\frac{3}{4}$

Slit width = d

λ = 5500 A^o

A^o = 5.5 × 10^-7 m

θ_n = 30^o

For first secondary minima

d sin θ_n= λ

$d = \frac{λ}{\sin θ_{n}}$

⇒ d = $\frac{5.5 \times 10^{- 7}}{\sin 30^{o}}$

⇒ d = 11 × 10^-7m

For first secondary maxima

d sin θ_n= $\frac{3 λ}{2}$

⇒ sinθ_n = $\frac{3 λ}{2 d}$

= $\frac{3 \times 5.5 \times 10^{- 7}}{2 \times 11 \times 10^{- 7}}$

⇒ sinθ_n= $\frac{3}{4}$

⇒ θ_n= sin^-1 (3/4 )

44.

Light wave enters from medium 1 to medium 2. Its velocity in 2^nd medium is double from 1. For total internal reflection the angle of incidence must be greater than

30^o
60^o
45^o
90^o

45.

A transparent cube of 15 cm edge contains a small air bubble. Its apparent depth when viewed through one face is 6 cm and when viewed through opposite face is 4 cm. The refractive index of material of cube is

46.

Focal length of objective and eye piece of telescope are 200 cm and 4 cm respectively. What is the length of telescope for normal adjustment?

196 cm
204 cm
250 cm
225 cm

47.

The intensity ratio of the maxima and minima in an interference pattern produced by two coherent sources of light is 9 : 1. The intensities of the used light sources are in ratio

3 : 1
4 : 1
9 : 1
10 : 1

48.

Which of the following has the longest de Broglie wavelength if they are moving with the same velocity?

Neutron
Proton
$α$ -particle
β-particle

49.

An atom of mass number 15 and atomic number 7 captures an a-particle and then emits a proton. The mass number and atomic number of the resulting atom will be respectively

14 and 12
15 and 3
16 and 4
18 and 8

50.

A zener diode is specified as having a breakdown voltage of 9.1 V, with a maximum power dissipation of 364 mW. What is the maximum current the diode can handle?