AIIMS Physics: Questions 453 - 457 of 500

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Question number: 453

» Ray Optics » Deviation and Dispersion of Light by a Prism

Appeared in Year: 2001

MCQ▾

Question

A disc is placed on a surface of pond which has 53 refractive index. A source of light is placed 4m below the surface of liquid. The minimum radius of disc will be so light is not coming out – [AIPMT]

Choices

Choice (4) Response

a.

3m

b.

6m

c.

4m

d.

Question number: 454

» Atoms and Nuclei » Half Life and Mean Life

Appeared in Year: 2002

MCQ▾

Question

A sample of radioactive element is containing 4×1015 active nuclei. Half life of element is 10 days, then number of decayed nuclei after 30 days –

[AIPMT]

Choices

Choice (4) Response

a.

2 x 1015

b.

3.5 x 1015

c.

0.5 x 1015

d.

1 x 1015

Question number: 455

» Electrostatics » Electric Potential

MCQ▾

Question

Calculated the kinetic energy of a point charge of 6μC at x=3m . This charge is initially at rest at the origin. And a uniform electric field of 4kNC1 is in x direction.

Choices

Choice (4) Response

a.

24mJ

b.

72mJ

c.

24mJ

d.

72mJ

Question number: 456

» Dual Nature of Matter and Radiation » De-Broglie Relation

MCQ▾

Question

The De – Broglie wavelength of neutron of energy 5eV is –

Choices

Choice (4) Response

a.

0.236

b.

0.128

c.

0.101

d.

0.256

Question number: 457

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

MCQ▾

Question

If the work function of a metal is 2.1eV and the wavelength of incident photon is 5.2×107m , than what is the maximum kinetic energy of photo electrons?

Choices

Choice (4) Response

a.

4.5eV

b.

0.3eV

c.

1.3eV

d.

2.4eV

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