AIIMS (All India Institute of Medical Sciences) Physics: Questions 202 - 204 of 500

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Question number: 202

» Dual Nature of Matter and Radiation » Photoelectric Effect

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Appeared in Year: 2006

Assertion-Reason▾

Question

Assertion (Ꭺ)

The photoelectrons produced by a monochromatic light beam incident on a metal surface have a spread in their kinetic energies.

Reason (Ꭱ)

The work function of the metal varies as a function of depth from the surface.

Choices

Choice (4)Response

a.

Ꭺ is false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are false

Question number: 203

» Dual Nature of Matter and Radiation » Black-Body Radiation

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Appeared in Year: 2005

Assertion-Reason▾

Question

Assertion (Ꭺ)

For higher temperature the peak emission wavelength of a black body shifts to lower wavelength.

Reason (Ꭱ)

Peak emission wavelength of black body is proportional to the fourth power of temperature.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is false but Ꭱ is true

d.

Ꭺ is true but Ꭱ is false

Question number: 204

» Laws of Motion » Laws of Friction

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Appeared in Year: 2008

Assertion-Reason▾

Question

Assertion (Ꭺ)

Angle of repose is equal to the angle of limiting friction.

Reason (Ꭱ)

When the body is just at the point of motion, the force of friction in this stage is called limiting friction.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Ꭺ is false but Ꭱ is true

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

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