Dual Nature of Matter and Radiation (AIIMS Physics): Questions 13 - 16 of 27

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Question number: 13

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

MCQ▾

Question

A black body, at a temperature of 240°C, radiates heat at a rate of 30calm2s1 . When its temperature is raised to 750°C, the heat radiated by it in calm2s1 will be closest to –

Choices

Choice (4) Response

a.

380

b.

260

c.

480

d.

140

Question number: 14

» Dual Nature of Matter and Radiation » Photoelectric Effect

Appeared in Year: 1999

MCQ▾

Question

Light of wavelength 3000 in Photoelectric effect gives electron of maximum Kinetic Energy 0.5eV . If wavelength change to 2000 then maximum kinetic energy of emitted electrons will be – [AIPMT]

Choices

Choice (4) Response

a.

Greater than 0.5 eV

b.

Less than 0.5 eV

c.

Photoelectric effect does not occurs

d.

0.5 eV

Question number: 15

» Dual Nature of Matter and Radiation » Einstein's Photoelectric Equation

Appeared in Year: 1993

MCQ▾

Question

The wavelength of a 1KeV photon is 1.24×109m . What is the frequency of 1MeV photon: [AIPMT]

Choices

Choice (4) Response

a.

2.4×1023Hz

b.

1.24×1015Hz

c.

2.4×1020Hz

d.

1.24×1018Hz

Question number: 16

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

MCQ▾

Question

A proton moves on a circular path of radius 4.2×103m in a perpendicular magnetic field of 0.490T . The De Broglie wavelength associated with the proton will be –

Choices

Choice (4) Response

a.

0.002

b.

0.2

c.

2

d.

0.02

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