NEET Physics: Questions 2077 - 2080 of 2099

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Question number: 2077

» Wave Optics » Young's Double Slit Experiment

Appeared in Year: 2016

MCQ▾

Question

A linear aperture whose width is 0.02cm is placed immediately in front of a lens of focal length 60cm . The aperture is illuminated normally by a parallel beam of wavelength 5×105cm . The distance of the first dark band of the diffraction pattern from the centre of the screen is –

Choices

Choice (4) Response
a.

0.10cm

b.

0.20cm

c.

0.25cm

d.

0.15cm

Question number: 2078

» Dual Nature of Matter and Radiation » Particle Nature of Light

Appeared in Year: 2016

MCQ▾

Question

Photons with energy 5eV are incident on a cathode C in a photoelectric cell. The maximum energy of emitted photoelectrons is 2eV . When photons of energy 6eV are incident on C, no photoelectrons will reach the anode A, if the stopping potential of A relative to C is:

Choices

Choice (4) Response
a.

+4V

b.

1V

c.

3V

d.

+3V

Question number: 2079

» Atoms and Nuclei » Hydrogen Spectrum

Appeared in Year: 2016

MCQ▾

Question

If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits a photon of wavelength λ . When it jumps from the 4th orbit to the 3rd orbit, the corresponding wavelength of the photon will be –

Choices

Choice (4) Response
a.

916λ

b.

2013λ

c.

1625λ

d.

207λ

Question number: 2080

» Rotational Motion » Rotational Kinetic Energy

Appeared in Year: 2016

MCQ▾

Question

A solid sphere of mass m and radius R is rotating about its diameter. A solid cylinder of the same mass and same radius is also rotating about its geometrical axis with an angular speed twice that of the sphere. The ratio of their kinetic energies of rotation (EsphereEcylinder) will be:

Choices

Choice (4) Response
a.

1:4

b.

3:1

c.

1:5

d.

2:3

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