AIIMS Physics: Questions 202 - 204 of 500

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Question number: 202

» Dual Nature of Matter and Radiation » Photoelectric Effect

Appeared in Year: 2006

Assertion-Reason▾

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. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
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. Ꭺ is false but Ꭱ is true

Question number: 203

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

Appeared in Year: 2005

Assertion-Reason▾

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. Ꭺ is true but Ꭱ is false
b. Both Ꭺ and Ꭱ are false
c. Ꭺ is false but Ꭱ is true
d. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

Question number: 204

» Laws of Motion » Laws of Friction

Appeared in Year: 2008

Assertion-Reason▾

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 false
b. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
c. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
d. Ꭺ is true but Ꭱ is false

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